FINAL LICENSE RENEWAL INTERIM STAFF GUIDANCE LR-ISG-2012-01

WALL THINNING DUE TO EROSION MECHANISMS

INTRODUCTION This license renewal interim staff guidance (LR-ISG), LR-ISG-2012-01, provides interim guidance for an approach acceptable to the U.S. Nuclear Regulatory Commission (NRC) staff to manage the effects of aging during the period of extended operation for wall thinning due to various erosion mechanisms for piping and components within the scope of the License Renewal Rule (Title 10 of the Code of Federal Regulations Part 54 (10 CFR Part 54), “Requirements for Renewal of Operating Licenses for Nuclear Power Plants”). This LR-ISG revises NUREG-1801, Rev. 2, “Generic Aging Lessons Learned (GALL) Report,” aging management program (AMP) XI.M17, “Flow-Accelerated Corrosion.” It also supplements, or revises, related aging management recommendations in the GALL Report and NUREG-1800, Rev. 2, “Standard Review Plan for Review of License Renewal Applications for Nuclear Power Plants” (SRP-LR). DISCUSSION Wall thinning due to erosion mechanisms has caused problems in the past and continues to be encountered in some operating reactor systems. Recent licensee event reports (254/2009-004-00, 237/2007-003-00, 277/2006-003-00) have documented inoperable equipment resulting from erosion which occurred during infrequent test activities and for piping that had previously been replaced with chromium-molybdenum material that was resistant to flow-accelerated corrosion (FAC). The staff has determined that existing guidance in the SRP-LR and the GALL Report does not adequately address wall thinning due to erosion mechanisms such as cavitation, flashing, droplet impingement, and solid particle impingement. Erosion, similar to FAC, is a wall-thinning phenomenon related to fluid dynamics. However, each wall-thinning mechanism has unique causes, and effective aging management of wall thinning requires consideration of these individual mechanisms. The NRC and industry guidance for the aging management of erosion mechanisms is largely absent, but in the case of cavitation erosion, industry guidelines (Electric Power Research Institute (EPRI) 1010639, Revision 4, “Non-Class 1 Mechanical Implementation Guideline and Mechanical Tools”) state that it is typically associated with improper operation and is not an applicable aging effect because it is considered to be a design deficiency. The industry guidelines also state that this deficiency will be corrected during the current term of operation. In that regard, the Statement of Considerations (60 FR 22461, 22469; May 8, 1995) for 10 CFR Part 54 notes that corrective actions that should be taken to address functional degradation logically include cause determinations, which could involve mechanisms other than aging (e.g., improper operation), but those corrective actions should focus on prevention, elimination, or management of the effects caused by these mechanisms. During recent license renewal reviews, the staff found instances where applicants continued to experience loss of material due to cavitation erosion because the design deficiency was not corrected. In some of these cases, the applicants did not identify loss of material due to erosion as an aging effect requiring management, even though they conducted ongoing wall thickness monitoring and periodic repairs to in-scope components.

- 2 - As noted in SRP-LR Section 2.1.3.2.2, “Long-Lived,” passive components that are not replaced on the basis of a qualified life or specified time period require an aging management review (AMR) under 10 CFR 54.21(a)(1)(ii). SRP-LR Section 2.1.3.2.2 also states that components replaced on the basis of condition are not generically excluded from an AMR, and condition monitoring may be evaluated as a program to ensure functionality during the period of extended operation. If an applicant has implemented a replacement strategy for susceptible items, such as replacement frequency that utilizes actual wall thinning data from past plant-specific operating experience, then the staff recognizes these items do not meet the definition of long-lived, passive components; therefore, they do not have to be managed for aging within the context of license renewal. However, if other strategies to manage the aging of the susceptible items are utilized, such as replacement based on periodic monitoring for loss of material by wall thickness measurements, then these items should be managed for aging, and this LR-ISG is applicable. GALL Report AMP XI.M17, “Flow-Accelerated Corrosion,” manages wall thinning due to FAC. It is well established and widely used by industry. However, the existing guidance in this program is not fully applicable to wall thinning due to erosion mechanisms. For example, the “monitoring and trending” program element of AMP XI.M17 includes the use of software to identify locations most susceptible to wall thinning due to FAC, but the software does not identify locations most susceptible to erosion. Also, the “corrective actions” program element of AMP XI.M17 includes the replacement of susceptible components with FAC-resistant material, which does not necessarily prevent wall thinning due to erosion mechanisms. As such, additional consideration is needed to address wall thinning due to erosion mechanisms. As noted in EPRI guidelines in Nuclear Safety Analysis Center (NSAC)-202L, Revision 2 (April 1999) or Revision 3 (May 2006), “Recommendations for an Effective Flow-Accelerated Corrosion Program,” (NSAC-202L-R2 or -R3), if wall thinning has been caused by a mechanism other than FAC (e.g., erosion mechanisms such as cavitation, flashing, droplet impingement, and solid particle impingement), and it is being managed through periodic monitoring, then an appropriate inspection program to address the suspected phenomenon should be developed. Clarifications to Definitions Section IX.E, “Aging Effects,” of the GALL Report currently includes “erosion,” and “flow-accelerated corrosion,” in its definition of “loss of material,” but only includes “cavitation” for concrete structures. Section IX.F, “Significant Aging Mechanisms,” of the GALL Report defines “erosion” as the “loss of material from a solid surface…due to mechanical interaction between that surface and a fluid.” In addition, it defines “flow-accelerated corrosion” as the “co-joint activity involving corrosion and erosion in the presence of a moving corrosive fluid leading to the accelerated loss of material.” Although the GALL Report definition associates FAC with erosion, NSAC-202L-R3 states that FAC is sometimes, but incorrectly, called erosion corrosion and notes that erosion is not part of the FAC degradation mechanism. Since erosion is not involved in the FAC process, as the GALL Report definition suggests, this may lead to some confusion and inconsistencies in how NRC guidance is applied. In addition, Section IX.E of the GALL Report currently defines “wall thinning” as an aging effect that “is a specific type of loss of material attributed to general corrosion or flow-accelerated corrosion.” In light of this discussion, the definitions of these aging effects and their associated mechanisms need to be revised to include additional mechanisms associated with erosion.

- 3 - Although the GALL Report defines “erosion” and includes it as one of the mechanisms which causes loss of material, there are currently no specific AMR items for piping, piping components, or piping elements that cite loss of material due to erosion. This aspect has been recognized by the industry in EPRI Report 1010639, Section 3.1.6, which cites erosion as a plausible aging mechanism where particulates are not controlled or a two-phase flow is present. Within AMPs in the GALL Report, only AMP XI.M20, “Open-Cycle Cooling Water System,” includes erosion in its description of aging effects being managed, and this is only due to the presence of solid particles in raw water systems. There are, however, several other AMPs that discuss erosion in the “parameters monitored,” “detection of aging effects,” and “acceptance criteria,” program elements, but the AMR items associated with these other AMPs do not address piping, piping components or piping elements. Erosion in piping is the result of fluid motion. It may take many forms including cavitation, flashing, liquid droplet impingement, and solid particle impingement. Due to the wide variety of conditions that can lead to erosion, erosion has been observed in many types of water systems. Erosion mechanisms are sometimes perceived as being comparable to wall thinning due to FAC; however, these other mechanisms are not addressed in the prediction methodology for FAC programs. Based on staff reviews of industry-wide operating experience, these additional mechanisms require further consideration to ensure that passive components are being maintained consistent with the current licensing basis. Changes to the Flow-Accelerated Corrosion Aging Management Program GALL Report AMP XI.M17, “Flow-Accelerated Corrosion,” relies on implementation of NSAC-202L-R2 or -R3. In 1989, the NRC issued Generic Letter 89-08, “Erosion/Corrosion-Induced Pipe Wall Thinning,” to ensure that operating nuclear power plants had developed these types of programs to address long-term degradation due to FAC. In general, FAC programs include analyses to determine critical locations, inspections to identify the extent of wall thinning at these locations, and follow-up inspections to monitor degradation rates. Corrective actions are taken as necessary to repair or replace the component subject to ongoing degradation to ensure it continues to meet the current licensing basis. The FAC guideline, NSAC-202L-R2 and -R3, states that it does not address other wall-thinning mechanisms, such as cavitation or erosive wear. The staff notes that these other wall-thinning mechanisms are fundamentally different and require alternate analyses to predict susceptible locations and potentially require different solutions. However, the staff notes that the existing FAC program provides a useful methodology to plan and perform component inspections, and to record and trend inspection data. In that respect, NSAC-202L-R2 or -R3 notes that if the wear mechanism has not been identified, then inspections of components replaced with FAC-resistant materials should continue because these materials do not protect against damage from erosion mechanisms such as cavitation and liquid impingement. The staff’s review of operating experience has shown that, in some cases, wall thinning is caused by a combination of mechanisms, which includes FAC and some type of erosion (Callaway 1999, Dresden 2007). These alternate wall-thinning mechanisms have been recognized in EPRI 1011231, “Cavitation, Flashing, Liquid Droplet Impingement, and Solid Particle Erosion in Nuclear Power Plant Piping Systems.” In addition, EPRI 112657, Revision B-A, “Revised Risk-Informed Inservice Inspection Evaluation Procedure,” includes “erosion cavitation” in the same “flow sensitive”

- 4 - category as FAC. Section 4.4.2 of NSAC-202L-R3 provides guidance for “Susceptible-Not-Modeled” lines, where reasonably accurate analytical models cannot be developed due to unknown or widely varying operating conditions. Lines or locations that are being monitored for wall thinning due to erosion mechanisms may be included with these other non-modeled lines and treated in a comparable fashion. In its reviews of recent license renewal applications (LRAs) (e.g., Duane Arnold, Palo Verde, Columbia, South Texas Project), the staff noted that applicants were monitoring wall thinning due to various erosion mechanisms, including cavitation during infrequent operational alignments, such as surveillance activities or pump starts/stops. In addition, the staff noted some recent licensee event reports that documented inoperable equipment associated with erosion mechanisms (Dresden 2007, Quad Cities 2009). As stated, it is the staff’s view that, if an applicant has resolved these types of situations (e.g., cavitation) by eliminating the source of the degradation through design or operating parameter changes, and after follow-up inspections confirmed that the degradation source was eliminated, then it would be expected that no further aging management activities for the specific concern that was eliminated would be required. The design change and effectiveness confirmation activities associated with these situations would be part of the normal corrective action program and would be considered in a license renewal review through ongoing operating experience reviews. However, if an applicant has decided to periodically monitor a component’s condition instead of resolving erosion through a design change, then these monitoring activities should become part of an AMP to ensure the applicable code-required wall thicknesses are maintained consistent with the current licensing basis. In addition, if an applicant has resolved these types of situations by substituting more resistant material and not eliminating the source of the degradation, then periodic monitoring should continue. Although every plant site may not encounter erosion mechanisms, if ongoing monitoring of wall thinning due to erosion is not included as part of any other AMP, then these monitoring activities should be included in the FAC program. ACTION The staff has determined that the existing guidance in the SRP-LR and GALL Report does not adequately address aging management of wall thinning due to erosion mechanisms such as cavitation, flashing, droplet impingement, and solid particle impingement. Consequently, the staff is taking the following actions:

1. The staff revised the definition of “wall thinning” in the GALL Report Table IX.E, “Selected Use of Terms for Describing and Standardizing AGING EFFECTS,” to include erosion mechanisms such as cavitation, flashing, droplet impingement, and solid particle impingement.

2. The staff revised the definition of “flow-accelerated corrosion,” and “erosion,” in the GALL Report Table IX.F, “Selected Definitions & Use of Terms for Describing and Standardizing AGING MECHANISMS,” in order to better align them with the definitions commonly used in industry and to include specific forms of erosion, respectively.

3. The staff revised GALL Report AMP XI.M17 to include the following activities for applicants that have identified and chosen to monitor wall thinning due to erosion mechanisms:

- 5 -

• Identify susceptible locations based on the extent-of-condition reviews from corrective actions in response to plant-specific and industry operating experience. While this is clearly a corrective action program activity, its applicability to AMRs is also clear. As noted in SRP-LR Section A.1.2.3.4, a program based solely on detecting component failures should not be considered an effective AMP. For example, for wall thinning due to cavitation, in addition to addressing the loss of material, the extent of condition may need to consider the consequences of vibrational loading caused by cavitation.

• If an applicant has chosen to implement design changes which will eliminate the

source of the erosion mechanism, then the confirmation process discussed in SRP-LR Section A.1.2.3.8 should periodically verify the effectiveness of the corrective actions. Periodic wall thickness measurements may be required until the effectiveness of the corrective actions has been confirmed.

• If an applicant has chosen to periodically monitor wall thickness as its basis for

ensuring that the intended function(s) will be maintained in the period of extended operation, then this activity is part of a monitoring AMP that needs to be reviewed. As noted in SRP-LR Section 2.1.3.2.2, for periodic replacements based on condition, condition monitoring may be evaluated in the integrated plant assessment as a program to ensure functionality during the period of extended operation.

In addition, the staff revised GALL Report AMP XI.M17 in order to organize information in a more coherent manner and to correct inconsistencies. The “scope of program” specifies high-energy systems, and the staff notes that the term “high-energy” is not consistently defined, but it is typically associated with high pressure systems. Although this was the initial focus of the NRC’s generic communication in this area, as correctly noted in NSAC-202L-R2 or -R3, “pressure does not affect the level of FAC wear,” but a “failure in a low-pressure system could have significant consequences.” Therefore, the reference to high-energy systems was deleted in the “scope of program” to better align the AMP with the more accurately stated scope of NSAC-202L-R2 or -R3.

4. The staff revised SRP-LR Table 3.0-1, “FSAR Supplement for Aging Management of

Applicable Systems,” for GALL Report Chapter XI.M17 to align it with the proposed change made to the scope of the program and revised SRP-LR Tables 3.1-1, 3.2-1, 3.3-1, and 3.4-1 by adding aging management review items to align the guidance with the change made to the scope of GALL Report AMP XI.M17. The staff also added associated items in the GALL Report to correspond with the new items in the SRP-LR.

The revised portions of the SRP-LR and the GALL Report are documented in Appendix A, “Revised SRP-LR,” and Appendix B, “Revised GALL Report.” The extent and locations of these changes are clarified in Appendix C, “Mark-Up Showing Changes to the SRP-LR,” and Appendix D, “Mark-Up Showing Changes to the GALL Report.” The guidance in this final LR-ISG is approved. The staff will follow this guidance during its reviews of LRAs, and will incorporate this final LR-ISG into the next formal revision of the associated license renewal guidance documents. Current and future license renewal applicants should address this and all other active final LR-ISGs as stated in Nuclear Energy Institute (NEI) 95-10, Revision 6, “Industry Guidelines for Implementing the Requirements of

- 6 - 10 CFR Part 54 – License Renewal Rule.” On July 13, 2012, the staff issued a Federal Register notice (77 FR 41457) to request public comments on the draft LR-ISG. In response, the NRC received comments from NEI by letter dated August 27, 2012. The NRC staff considered these comments in developing the final LR-ISG-2012-01. The staff’s responses to these comments are in Appendix E, “Resolution of Public Comments on Draft LR-ISG-2012-01.” NEWLY IDENTIFIED SYSTEMS, STRUCTURES, AND COMPONENTS UNDER 10 CFR 54.37(b) This LR-ISG addresses how wall thinning due to erosion mechanisms can be managed. It does not address whether components subject to wall thinning are within the scope of license renewal under 10 CFR 54.4. The NRC is not proposing to treat components being managed for wall thinning due to erosion mechanisms as “newly identified” systems, structures, and components (SSCs) under 10 CFR 54.37(b). Therefore, any additional action on such components which the NRC may impose upon current holders of renewed operating licenses under 10 CFR Part 54 would not fall within the scope of 10 CFR 54.37(b). BACKFITTING AND ISSUE FINALITY This LR-ISG contains guidance as to one acceptable approach for managing the effects of aging during the period of extended operation caused by erosion mechanisms for components within the scope of license renewal. Set forth below is the staff’s discussion on compliance with the requirements of the Backfit Rule, 10 CFR 50.109. Compliance with the Backfit Rule and Issue Finality Issuance of this LR-ISG does not constitute backfitting as defined in 10 CFR 50.109(a)(1), and the NRC staff did not prepare a backfit analysis for issuing this LR-ISG. There are several rationales for this conclusion, depending upon the status of the nuclear power plant licensee. Licensees who are currently in the license renewal process – The backfitting provisions in 10 CFR 50.109 do not protect an applicant, as backfitting policy considerations are not applicable to an applicant. Therefore, issuance of this LR-ISG does not constitute backfitting as defined in 10 CFR 50.109(a)(1). There are, currently, no combined license renewal applicants, and therefore the changes and new positions presented in the LR-ISG may be made without consideration of the issue finality provisions in 10 CFR Part 52. Licensees who already hold a renewed license – This guidance is non-binding and the LR-ISG does not require current holders of renewed licenses to take any action (i.e., programmatic or plant hardware changes for managing the aging of components caused by erosion mechanisms). However, current holders of renewed licenses should treat this guidance as operating experience and take actions as appropriate to ensure that applicable AMPs are, and will remain, effective. If, in the future, the NRC decides to take additional action and impose requirements for management of components affected by erosion mechanisms, then the NRC will follow the requirements of the Backfit Rule. Current operating license holders or combined license holders who have not applied for renewed licenses – The backfitting provisions in 10 CFR 50.109 do not protect a future applicant, as backfitting policy considerations are not applicable to a future applicant.

- 7 - Therefore, issuance of this LR-ISG does not constitute backfitting as defined in 10 CFR 50.109(a)(1). The issue finality provisions of Part 52 do not extend to the aging management matters covered by Part 54, as evidenced by the requirement in 10 CFR 52.107 stating that applications for renewal of a combined license must be in accordance with 10 CFR Part 54. CONGRESSIONAL REVIEW ACT This ISG is a rule as designated in the Congressional Review Act (5 USC, Sec. 801-808). However, the Office of Management and Budget has determined that LR-ISG-2012-01 is not a major rule as designated under the Congressional Review Act. REFERENCES

5 USC, Section 801, Congressional Review of Agency Rulemaking, Office of the Law Revision Counsel of the House of Representatives, 2012.

10 CFR Part 50, Domestic Licensing of Production and Utilization Facilities, Office of the Federal Register, National Archives and Records Administration, 2012.

10 CFR Part 52, Licenses, Certifications, and Approvals for Nuclear Power Plants, Office of the Federal Register, National Archives and Records Administration, 2012.

10 CFR Part 54, Requirements for Renewal of Operating Licenses for Nuclear Power Plants, Office of the Federal Register, National Archives and Records Administration, 2012.

EPRI TR-112657, “Revised Risk-Informed Inservice Inspection Evaluation Procedure,” Revision B-A, Electric Power Research Institute, Palo Alto, CA, December 1999 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML013470102).

EPRI 1010639, “Non-Class 1 Mechanical Implementation Guideline and Mechanical Tools, Revision 4,” Electric Power Research Institute, Palo Alto, CA, January 2006.

EPRI 1011231, “Recommendations for Controlling Cavitation, Flashing, Liquid Droplet Impingement, and Solid Particle Erosion in Nuclear Power Plant Piping Systems.” Electric Power Research Institute, Palo Alto, CA, November 2004.

Letter from C.R. Costanzo, NextEra Energy Duane Arnold, LLC to Document Control Desk, NRC, February 2, 2010, Subject: Response to Request for Additional Information, Letter No. NG-10-0043 (ADAMS Accession No. ML100350390).

Letter from J.H. Hesser, APS Palo Verde Nuclear Generating Station, to Document Control Desk, NRC, July 30, 2010, Subject: Response to Follow-up Request for Additional Information, Letter No. 102-06233-JHH/GAM (ADAMS Accession No. ML102240166).

Letter from S.K. Gambhir, Energy Northwest, Columbia Generating Station, to Document Control Desk, NRC, January 28, 2011, Subject: Response to Request for Additional Information, Letter No. G02-11-029, (ADAMS Accession No. ML110320419).

Letter from D.W. Rencurrel, South Texas Project, to Document Control Desk, NRC, November 21, 2011, Subject: Response to Requests for Additional Information, Letter No. NOC-AE-11002742, (ADAMS Accession No. ML11335A131).

Letter from Jason Remer, Nuclear Energy Institute, to Cindy Bladey, NRC, August 27, 2012, Subject: Industry Comments on Draft License Renewal Interim Staff Guidance,

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LR-ISG-2012-01, “Wall Thinning Due to Erosion Mechanisms,” (ADAMS Accession No. ML12244A004).

Licensee Event Report 483/1999-003-01, Callaway Unit 1, “Manual Reactor Trip Due to Heater Drain System Pipe Rupture Caused by Flow Accelerated Corrosion,” May 1, 2000 (ADAMS Accession No. ML003712775).

Licensee Event Report 277/2006-003-00, Peach Bottom Unit 2, “Elbow Leak on Piping Attached to Suppression Pool Results in Loss of Containment Integrity,” December 4, 2006 (ADAMS Accession No. ML063420059).

Licensee Event Report 237/2007-003-00, Dresden Unit 2, “High Pressure Coolant Injection System Declared Inoperable,” September 24, 2007 (ADAMS Accession No. ML072750663).

Licensee Event Report 254/2009-004-00, Quad Cities Unit 1, “Pinhole Leak in Core Spray Piping Results in Loss of Containment Integrity and Plant Shutdown for Repairs,” November 6, 2009 (ADAMS Accession No. ML093170206).

NEI 95-10, “Industry Guideline for Implementing the Requirements of 10 CFR Part 54 – License Renewal Rule, Revision 6, Nuclear Energy Institute, Washington, D.C., June 2005 (ADAMS Accession No. ML051860406).

NRC Generic Letter 89-08, “Erosion/Corrosion-Induced Pipe Wall Thinning,” Washington, D.C., May 2, 1989 (ADAMS Accession No. ML072780548).

NRC NUREG-1800, “Standard Review Plan for Review of License Renewal Applications for Nuclear Power Plants,” Revision 2, Washington, D.C., December 2010 (ADAMS Accession No. ML103490036).

NRC NUREG-1801, “Generic Aging Lessons Learned (GALL) Report,” Revision 2, Washington, D.C., December 2010 (ADAMS Accession No. ML103490041).

NSAC 202L, “Recommendations for an Effective Flow Accelerated Corrosion Program,” Revision 2, Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, April 1999.

NSAC 202L, “Recommendations for an Effective Flow Accelerated Corrosion Program,” Revision 3, Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, May 2006.

Appendices

Appendix A, Revised SRP-LR

Appendix B, Revised GALL Report

Appendix C, Mark-up Showing Changes to the SRP-LR

Appendix D, Mark-up Showing Changes to the GALL Report

Appendix E, Resolution of Public Comments on Draft LR-ISG-2012-01

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er, t

reat

ed

wat

er (

bora

ted)

, raw

wat

er

Wal

l thi

nnin

g du

e to

ero

sion

C

hapt

er X

I.M17

, “F

low

-A

ccel

erat

ed C

orro

sion

” N

o V

II.C

1.A

-40

9 V

II.E

1.A

-40

7 V

II.E

3.A

-40

8

N/A

N

/A

N/A

Tab

le 3

.3-2

Ag

ing

Man

agem

ent

Pro

gra

ms

for

Au

xilia

ry S

yste

ms

for

Ag

ing

Man

agem

ent

of

Au

xilia

ry S

yste

ms

GA

LL

Rep

ort

Ch

apte

r/A

MP

P

rog

ram

Nam

e

Cha

pter

XI.M

17

Flo

w-A

ccel

erat

ed C

orro

sion

T

able

3.4

-1 S

um

mar

y o

f A

gin

g M

anag

emen

t P

rog

ram

s fo

r S

team

an

d P

ow

er C

on

vers

ion

Sys

tem

Eva

luat

ed in

Ch

apte

r V

III o

f th

e G

AL

L R

epo

rt

ID

Typ

e

Co

mp

on

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

ms

Fu

rth

er E

valu

atio

n

Rec

om

men

ded

R

ev2

Item

R

ev1

Item

60

BW

R/

PW

R

Any

mat

eria

l, pi

ping

, pip

ing

com

pone

nts,

and

pip

ing

elem

ents

exp

osed

to

trea

ted

wat

er

Wal

l thi

nnin

g du

e to

ero

sion

C

hapt

er X

I.M17

, “F

low

-A

ccel

erat

ed C

orro

sion

” N

o V

III.D

1.S

-40

8 V

III.D

2.S

-40

8 V

II.G

.S-

408

N/A

N

/A

N/A

Appendix B

Revised GALL Report

App

endi

x B

: R

evis

ed G

ALL

Rep

ort

B-2

IV

R

EA

CT

OR

VE

SS

EL,

INT

ER

NA

LS, A

ND

RE

AC

TO

R C

OO

LAN

T S

YS

TE

M

C1

Rea

ctor

Coo

lant

Pre

ssur

e B

ound

ary

(BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

IV.C

1.R

-40

6

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y R

eact

or C

oola

nt

Wal

l thi

nni

ng

due

to

ero

sio

n

Cha

pter

XI.M

17,

“Flo

w-A

ccel

erat

ed

Cor

rosi

on”

No

V

EN

GIN

EE

RE

D S

AF

ET

Y F

EA

TU

RE

S

D1

Em

erge

ncy

Cor

e C

oolin

g S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

V.D

1.E

-407

Pip

ing,

pip

ing

com

pone

nts,

and

pi

ping

ele

men

ts

An

y T

reat

ed W

ater

(b

orat

ed)

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

V

EN

GIN

EE

RE

D S

AF

ET

Y F

EA

TU

RE

S

D2

Em

erge

ncy

Cor

e C

oolin

g S

yste

m (

BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

V.D

2.E

-408

Pip

ing,

pip

ing

com

pone

nts,

and

pi

ping

ele

men

ts

An

y T

reat

ed w

ater

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

VII

AU

XIL

IAR

Y S

YS

TE

MS

C

1 O

pen-

Cyc

le C

oolin

g W

ater

Sys

tem

(S

ervi

ce W

ater

Sys

tem

)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VII.

C1

.A-4

09

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y R

aw

wat

er

Wal

l thi

nni

ng

due

to

ero

sio

n

Cha

pter

XI.M

17,

“Flo

w-A

ccel

erat

ed

Cor

rosi

on”

No

App

endi

x B

: R

evis

ed G

ALL

Rep

ort

B-3

V

II A

UX

ILIA

RY

SY

ST

EM

S

E1

Che

mic

al a

nd V

olum

e C

ontr

ol S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VII

.E1

.A-4

07

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y T

reat

ed w

ater

(b

orat

ed)

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

VII

AU

XIL

IAR

Y S

YS

TE

MS

E

3 R

eact

or W

ater

Cle

anup

Sys

tem

(B

WR

)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VII

.E3

.A-4

08

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

VIII

S

TE

AM

AN

D P

OW

ER

CO

NV

ER

SIO

N S

YS

TE

M

D1

Fee

dwat

er S

yste

ms

(PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VIII

.D1.

S-4

08

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

VIII

S

TE

AM

AN

D P

OW

ER

CO

NV

ER

SIO

N S

YS

TE

M

D2

Fee

dwat

er S

yste

ms

(BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VIII

.D2.

S-4

08

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

App

endi

x B

: R

evis

ed G

ALL

Rep

ort

B-4

V

III

ST

EA

M A

ND

PO

WE

R C

ON

VE

RS

ION

SY

ST

EM

G

A

uxili

ary

Fee

dwat

er S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VII

I.G.

S-4

08

P

ipin

g, p

ipin

g co

mpo

nent

s, a

nd

pipi

ng e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g d

ue

to e

rosi

on

C

hapt

er X

I.M17

, “F

low

-Acc

eler

ated

C

orro

sion

” N

o

Appendix B: Revised GALL Report

B-5

Table IX.E, Selected Use of Terms for Describing and Standardizing AGING EFFECTS

Term Usage in this document

Wall thinning Wall thinning is a specific type of loss of material attributed in the AMR items to general corrosion, flow-accelerated corrosion, and erosion mechanisms including cavitation, flashing, droplet impingement, or solid particle impingement.

Table IX.F, Selected Definitions & Use of Terms for Describing and Standardizing AGING MECHANISMS

Term Definition as used in this document

Erosion Erosion is the progressive loss of material due to the mechanical interaction between a surface and a moving fluid. Different forms of erosion include cavitation, flashing, droplet impingement, and solid particle impingement.

Flow-accelerated corrosion (FAC)

Flow-accelerated corrosion is a corrosion mechanism which results in wall thinning of carbon steel components exposed to moving, high temperature, low-oxygen water, such as PWR primary and secondary water, and BWR reactor coolant. FAC is the result of dissolution of the surface film of the steel which is transported away from the site of dissolution by the movement of water. [Ref. 27]

Appendix B: Revised GALL Report

B-6

XI.M17 FLOW-ACCELERATED CORROSION

Program Description

This program manages wall thinning caused by flow-accelerated corrosion (FAC) and may be used to manage wall thinning due to various erosion mechanisms. The program relies on implementation of the Electric Power Research Institute (EPRI) guidelines in the Nuclear Safety Analysis Center (NSAC)-202L-R2 or -R3 for an effective FAC program. The program includes performing (a) an analysis to determine critical locations, (b) limited baseline inspections to determine the extent of thinning at these locations, and (c) follow-up inspections to confirm the predictions, or repairing or replacing components as necessary. NSAC-202L-R2 or -R3 provides general guidelines for the FAC program. To provide reasonable assurance that all the aging effects caused by FAC are properly managed, the program includes the use of a predictive code, such as CHECWORKS, that uses the implementation guidance of NSAC-202L-R2 or -R3 to satisfy the criteria specified in 10 CFR Part 50, Appendix B, for development of procedures and control of special processes. With appropriate considerations, this program may also manage wall thinning caused by mechanisms other than FAC, in situations where periodic monitoring is used in lieu of eliminating the cause of various erosion mechanism(s).

Evaluation and Technical Basis

1. Scope of Program: The FAC program, described by the EPRI guidelines in NSAC-202L-R2 or -R3, includes procedures or administrative controls to assure that structural integrity is maintained for carbon steel piping containing two-phase and single-phase fluids. This program also covers valve bodies that retain pressure in these systems. The FAC program was originally outlined in NUREG-1344 and was further described through the Nuclear Regulatory Commission (NRC) Generic Letter 89-08, “Erosion/Corrosion-Induced Pipe Wall Thinning.” The program may also include piping, piping components, and piping elements that are susceptible to erosion wall-thinning mechanisms such as cavitation, flashing, droplet impingement, or solid particle impingement in various water systems. Since there are no known materials that are immune to wall thinning due to erosion, piping and components of any material may be included in the erosion portion of the program.

2. Preventive Actions: The FAC program is an analysis, inspection, and verification program; no preventive action has been recommended in this program. However, it is noted that monitoring of water chemistry to control pH and dissolved oxygen content are effective in reducing FAC, and the selection of appropriate piping material, geometry, and hydrodynamic conditions can be effective in reducing both FAC and erosion mechanisms.

3. Parameters Monitored/Inspected: The aging management program monitors the effects of wall thinning due to FAC and erosion on the intended function of piping and components by measuring wall thickness.

4. Detection of Aging Effects: Degradation of piping and components occurs by wall thinning. For FAC, the inspection program delineated in NSAC-202L-R2 or -R3 consists of identification of susceptible locations, as indicated by operating conditions or special considerations. This program specifies ultrasonic or radiographic testing to detect wall thinning. A representative sample of components is selected based on the most susceptible locations for wall thickness measurements at a frequency in accordance with NSAC-202L guidelines to ensure that degradation is identified and mitigated before the component integrity is challenged. The extent and schedule of the inspections ensure detection of wall thinning before the loss of intended function.

Appendix B: Revised GALL Report

B-7

For erosion mechanisms, the program includes the identification of susceptible locations based on the extent-of-condition reviews from corrective actions in response to plant-specific or industry operating experience. Components in this category can be treated in a manner similar to other “susceptible–not-modeled” lines discussed in NSAC-202L-R2 or -R3. EPRI 1011231 provides guidance for identifying potential damage locations. EPRI TR-112657, “Revised Risk-Informed Inservice Inspection Evaluation Procedure,” Revision B-A, or NUREG/CR-6031, “Cavitation Guide for Control Valves,” provides additional insights for cavitation. For cavitation, in addition to wall thinning, the extent-of-condition review may need to consider the consequences of vibrational loading caused by cavitation.

5. Monitoring and Trending: For FAC mechanisms, CHECWORKS or a similar predictive code estimates component degradation, as indicated by specific plant data, including material, hydrodynamic, and operating conditions. CHECWORKS was developed and benchmarked by comparing CHECWORKS predictions against actual component thickness measurements obtained from many plants. Data from each component inspection is used to calibrate the wear rates calculated in the predictive model with the observed field data. The use of such a predictive code to develop an inspection schedule provides reasonable assurance that structural integrity will be maintained between inspections. The program includes the evaluation of inspection results to determine if additional inspections are needed to ensure that the extent of wall thinning is adequately determined, that intended function will not be lost, and that corrective actions are adequately identified. Previous wear rate predictions due to FAC may change after a power uprate is implemented. The program includes updating wear rates in CHECWORKS according to power uprate conditions. Subsequent field measurements are used to calibrate or benchmark the predicted wear rates.

For erosion mechanisms, the program includes trending of wall thickness measurements at susceptible locations to adjust the monitoring frequency and to predict the remaining service life of the component for scheduling repairs or replacements. Inspection results are evaluated to determine if assumptions in the extent-of-condition review remain valid. If degradation is associated with infrequent operational alignments, such as surveillances or pump starts/stops, then trending activities may need to consider the number or duration of these occurrences. Periodic wall thickness measurements of replacement components may be required and should continue until the effectiveness of corrective actions has been confirmed.

6. Acceptance Criteria: Components are suitable for continued service if calculations determine that the predicted wall thickness at the next scheduled inspection is greater than or equal to the minimum allowable wall thickness. The minimum allowable wall thickness is typically the thickness needed to satisfy the hoop stress allowable under the original code of construction, but additional code requirements may also need to be met. A reasonable safety factor should be applied to the predicted wear rate determination to account for inaccuracies in the wear rate calculations and may need to consider uncertainties of ultrasonic testing measurements. As discussed in NSAC-202L-R3, the minimum safety factor should never be less than 1.1.

7. Corrective Actions: The program includes reevaluation, repair, or replacement of components for which the acceptance criteria are not satisfied, prior to their return to service. For FAC, long-term corrective actions could include adjusting operating parameters or replacing components with FAC-resistant materials. However, if the wear mechanism has not been identified, then the replaced components should remain in the inspection program because FAC-resistant materials do not protect against other damage

Appendix B: Revised GALL Report

B-8

mechanisms. When components are replaced with FAC-resistant materials, the susceptible components immediately downstream should be monitored to identify any increased wear due to the “entrance effect” as discussed in EPRI 1015072.

For erosion mechanisms, long-term corrective actions to eliminate the cause could include adjusting operating parameters or changing component designs; however, the effectiveness of these corrective actions should be verified. Periodic monitoring activities should continue for any components replaced with an alternate material, since a material that is completely erosion resistant is not available. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the corrective actions.

8. Confirmation Process: Site quality assurance (QA) procedures, review and approval processes, and administrative controls are implemented in accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the confirmation process.

9. Administrative Controls: Site QA procedures, review and approval processes, and administrative controls are implemented in accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the administrative controls.

10. Operating Experience: Wall-thinning problems in single-phase systems have occurred in feedwater and condensate systems (NRC IE Bulletin No. 87-01; NRC Information Notice [IN] 92-35, IN 95-11, IN 2006-08) and in two-phase piping in extraction steam lines (NRC IN 89-53, IN 97-84) and moisture separator reheater and feedwater heater drains (NRC IN 89-53, IN 91-18, IN 93-21, IN 97-84). Observed wall thinning may be due to mechanisms other than FAC or, less commonly, due to a combination of mechanisms (NRC IN 99-19, Licensee Event Report (LER) 483/1999-003-01, LER 277/2006-003-00, LER 237/2007-003-00, LER 254/2009-004-00).

References

10 CFR Part 50, Appendix B, Quality Assurance Criteria for Nuclear Power Plants, Office of the Federal Register, National Archives and Records Administration, 2009.

10 CFR Part 50.55a, Codes and Standards, Office of the Federal Register, National Archives and Records Administration, 2009.

EPRI 1011231, Recommendations for Controlling Cavitation, Flashing, Liquid Droplet Impingement, and Solid Particle Erosion in Nuclear Power Plant Piping Systems, Electric Power Research Institute, Palo Alto, CA, November 2004.

EPRI 1015072, Flow-Accelerated Corrosion – The Entrance Effect, Electric Power Research Institute, Palo Alto, CA, November 2007.

EPRI TR-112657, Revised Risk-Informed Inservice Inspection Evaluation Procedure, Revision B-A, Electric Power Research Institute, Palo Alto, CA, December 1999, Agencywide Documents Access and Management System (ADAMS) Accession No. ML013470102.

Licensee Event Report 483/1999-003-01, Callaway, Manual Reactor Trip due to Heater Drain System Pipe Rupture Caused by Flow Accelerated Corrosion, U.S. Nuclear Regulatory Commission, May 1, 2000, ADAMS Accession No. ML003712775.

Appendix B: Revised GALL Report

B-9

Licensee Event Report 277/2006-003-00, Peach Bottom Unit 2, Elbow Leak on Piping Attached to Suppression Pool Results in Loss of Containment Integrity, Exelon Nuclear, December 4, 2006, ADAMS Accession No. ML063420059.

Licensee Event Report 237/2007-003-00, Dresden Unit 2, High Pressure Coolant Injection System Declared Inoperable, U.S. Nuclear Regulatory Commission, September 24, 2007, ADAMS Accession No. ML072750663.

Licensee Event Report 254/2009-004-00, Quad Cities Unit 1, Pinhole Leak in Core Spray Piping Results in Loss of Containment Integrity and Plant Shutdown for Repairs, U.S. Nuclear Regulatory Commission, November 6, 2009, ADAMS Accession No. ML093170206.

NRC Generic Letter 89-08, Erosion/Corrosion-Induced Pipe Wall Thinning, U.S. Nuclear Regulatory Commission, May 2, 1989.

NRC IE Bulletin 87-01, Thinning of Pipe Walls in Nuclear Power Plants, U.S. Nuclear Regulatory Commission, July 9, 1987.

NRC Information Notice 89-53, Rupture of Extraction Steam Line on High Pressure Turbine, U.S. Nuclear Regulatory Commission, June 13, 1989.

NRC Information Notice 91-18, High-Energy Piping Failures Caused by Wall Thinning, U.S. Nuclear Regulatory Commission, March 12, 1991.

NRC Information Notice 91-18, Supplement 1, High-Energy Piping Failures Caused by Wall Thinning, U.S. Nuclear Regulatory Commission, December 18, 1991.

NRC Information Notice 92-35, Higher than Predicted Erosion/Corrosion in Unisolable Reactor Coolant Pressure Boundary Piping inside Containment at a Boiling Water Reactor, U.S. Nuclear Regulatory Commission, May 6, 1992.

NRC Information Notice 93-21, Summary of NRC Staff Observations Compiled during Engineering Audits or Inspections of Licensee Erosion/Corrosion Programs, U.S. Nuclear Regulatory Commission, March 25, 1993.

NRC Information Notice 95-11, Failure of Condensate Piping Because of Erosion/Corrosion at a Flow Straightening Device, U.S. Nuclear Regulatory Commission, February 24, 1995.

NRC Information Notice 97-84, Rupture in Extraction Steam Piping as a Result of Flow- Accelerated Corrosion, U.S. Nuclear Regulatory Commission, December 11, 1997.

NRC Information Notice 99-19, Rupture of the Shell Side of a Feedwater Heater at the Point Beach Nuclear Plant, U.S. Nuclear Regulatory Commission, June 23, 1999.

NRC Information Notice 2006-08, Secondary Piping Rupture at the Mihama Power Station in Japan, U.S. Nuclear Regulatory Commission, March 16, 2006.

NSAC-202L-R2, Recommendations for an Effective Flow Accelerated Corrosion Program, Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, April 8, 1999.

NSAC-202L-R3, Recommendations for an Effective Flow Accelerated Corrosion Program, (1011838), Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, May 2006.

NUREG-1344, Erosion/Corrosion-Induced Pipe Wall Thinning in U.S. Nuclear Power Plants, P. C. Wu, U.S. Nuclear Regulatory Commission, April 1989.

NUREG/CR-6031, Cavitation Guide for Control Valves, J. P. Tullis, U.S. Nuclear Regulatory Commission, April 1993.

Appendix C

Mark-up Showing Changes to the SRP-LR

Additions shown in underlineand bold Deletions marked with strikethrough

App

endi

x C

: M

ark-

up S

how

ing

Cha

nges

to th

e S

RP

-LR

C-2

T

able

3.0

-1 F

SA

R S

up

ple

men

t fo

r A

gin

g M

anag

emen

t o

f A

pp

licab

le S

yste

ms

GA

LL

C

hap

ter

GA

LL

Pro

gra

m

Des

crip

tio

n o

f P

rog

ram

Im

ple

men

tati

on

S

ched

ule

A

pp

licab

le G

AL

L

Rep

ort

an

d S

RP

-LR

C

hap

ter

Ref

eren

ces

XI.M

17

Flo

w-A

ccel

erat

ed

Cor

rosi

on (

FA

C)

The

pro

gram

con

sist

s of

(a)

con

duct

ing

appr

opria

te

anal

ysis

and

bas

elin

e in

spec

tions

, (b)

det

erm

inin

g th

e ex

tent

of t

hinn

ing

and

repl

acem

ent/r

epai

r of

co

mpo

nent

s, a

nd (

c) p

erfo

rmin

g fo

llow

-up

insp

ectio

n to

con

firm

or

quan

tify

and

take

long

-ter

m c

orre

ctiv

e ac

tions

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he p

rogr

am r

elie

s on

impl

emen

tatio

n of

E

PR

I gui

delin

es o

f NS

AC

-202

L-R

2 or

-R

3. [

Wh

ere

app

licab

le, t

he

pro

gra

m a

lso

man

ages

wal

l th

inn

ing

du

e to

ero

sio

n m

ech

anis

ms

such

as

cavi

tati

on

, fla

shin

g, d

rop

let

imp

ing

emen

t, a

nd

so

lid p

arti

cle

imp

ing

emen

t.]

Exi

stin

g P

rogr

am

GA

LL IV

/ S

RP

3.1

GA

LL V

/ S

RP

3.2

GA

LL

VII

/ SR

P 3

.3

G

ALL

VIII

/ S

RP

3.4

Tab

le 3

.1-1

Su

mm

ary

of

Ag

ing

Man

agem

ent

Pro

gra

ms

for

Rea

cto

r V

esse

l, In

tern

als,

an

d R

eact

or

Co

ola

nt

Sys

tem

Eva

luat

ed in

C

hap

ter

IV o

f th

e G

AL

L R

epo

rt

ID

Typ

e

Co

mp

on

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

ms

Fu

rth

er E

valu

atio

n

Rec

om

men

ded

R

ev2

Item

R

ev1

Item

110

BW

R/

An

y m

ater

ial,

pip

ing

, p

ipin

g c

om

po

nen

ts, a

nd

p

ipin

g e

lem

ents

exp

ose

d

to r

eact

or

coo

lan

t

Wal

l th

inn

ing

d

ue

to e

rosi

on

C

hap

ter

XI.M

17, “

Flo

w-

Acc

eler

ated

Co

rro

sio

n”

No

IV

.C1.

R-

406

N/A

App

endi

x C

: M

ark-

up S

how

ing

Cha

nges

to th

e S

RP

-LR

C-3

T

able

3.2

-1 S

um

mar

y o

f A

gin

g M

anag

emen

t P

rog

ram

s fo

r E

ng

inee

red

Saf

ety

Fea

ture

s E

valu

ated

in C

hap

ter

V o

f th

e G

AL

L R

epo

rt

ID

Typ

e

Co

mp

on

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

ms

Fu

rth

er E

valu

atio

n

Rec

om

men

ded

R

ev2

Item

R

ev1

Item

65

BW

R/

PW

R

An

y m

ater

ial,

pip

ing

, p

ipin

g c

om

po

nen

ts, a

nd

p

ipin

g e

lem

ents

exp

ose

d

to t

reat

ed w

ater

, tre

ated

w

ater

(b

ora

ted

)

Wal

l th

inn

ing

d

ue

to e

rosi

on

C

hap

ter

XI.M

17, “

Flo

w-

Acc

eler

ated

Co

rro

sio

n”

No

V

.D1.

E-

407

V.D

2.E

-40

8

N/A

N

/A

Tab

le 3

.3-1

Su

mm

ary

of

Ag

ing

Man

agem

en

t P

rog

ram

s fo

r A

uxi

liary

Sys

tem

s E

valu

ated

in C

hap

ter

VII

of

the

GA

LL

Rep

ort

ID

Typ

e

Co

mp

on

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

ms

Fu

rth

er E

valu

atio

n

Rec

om

men

ded

R

ev2

Item

R

ev1

Item

126

BW

R/

PW

R

An

y m

ater

ial,

pip

ing

, p

ipin

g c

om

po

nen

ts, a

nd

p

ipin

g e

lem

ents

exp

ose

d

to t

reat

ed w

ater

, tre

ated

w

ater

(b

ora

ted

), r

aw

wat

er

Wal

l th

inn

ing

d

ue

to e

rosi

on

C

hap

ter

XI.M

17, “

Flo

w-

Acc

eler

ated

Co

rro

sio

n”

No

V

II.C

1.A

-40

9 V

II.E

1.A

-40

7 V

II.E

3.A

-40

8

N/A

N

/A

N/A

Tab

le 3

.3-2

Ag

ing

Man

agem

ent

Pro

gra

ms

Rec

om

men

ded

fo

r A

gin

g M

an

agem

ent

of

Au

xilia

ry S

yste

ms

GA

LL

Rep

ort

Ch

apte

r/A

MP

P

rog

ram

Nam

e

Ch

apte

r X

I.M17

F

low

-Acc

eler

ated

Co

rro

sio

n

Tab

le 3

.4-1

S

um

mar

y o

f A

gin

g M

anag

emen

t P

rog

ram

s fo

r S

team

an

d P

ow

er C

on

vers

ion

Sys

tem

Eva

luat

ed in

Ch

apte

r V

III o

f th

e G

AL

L R

epo

rt

ID

Typ

e

Co

mp

on

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

ms

Fu

rth

er E

valu

atio

n

Rec

om

men

ded

R

ev2

Item

R

ev1

Item

60

BW

R/

PW

R

An

y m

ater

ial,

pip

ing

, p

ipin

g c

om

po

nen

ts, a

nd

p

ipin

g e

lem

ents

exp

ose

d

to t

reat

ed w

ater

Wal

l th

inn

ing

d

ue

to e

rosi

on

C

hap

ter

XI.M

17, “

Flo

w-

Acc

eler

ated

Co

rro

sio

n”

No

V

III.D

1.S

-40

8 V

III.D

2.S

-40

8 V

II.G

.S-

408

N/A

N

/A

N/A

Appendix D

Mark-up Showing Changes to the GALL Report

Additions shown in underline and bold Deletions marked with strikethrough

App

endi

x D

: M

ark-

up S

how

ing

Cha

nges

to th

e G

ALL

Rep

ort

D-2

IV

R

EA

CT

OR

VE

SS

EL,

INT

ER

NA

LS, A

ND

RE

AC

TO

R C

OO

LAN

T S

YS

TE

M

C1

Rea

ctor

Coo

lant

Pre

ssur

e B

ound

ary

(BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

IV.C

1 R

-406

Pip

ing

, pip

ing

co

mp

on

ents

, an

d

pip

ing

ele

men

ts

An

y R

eact

or

Co

ola

nt

Wal

l th

inn

ing

d

ue

to e

rosi

on

C

hap

ter

XI.M

17, “

Flo

w-

Acc

eler

ated

Co

rro

sio

n”

No

V

EN

GIN

EE

RE

D S

AF

ET

Y F

EA

TU

RE

S

D1

Em

erge

ncy

Cor

e C

oolin

g S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

V.D

1 E

-407

Pip

ing

, pip

ing

co

mp

on

ents

, an

d

pip

ing

ele

men

ts

An

y T

reat

ed W

ater

(b

ora

ted

) W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

V

EN

GIN

EE

RE

D S

AF

ET

Y F

EA

TU

RE

S

D2

Em

erge

ncy

Cor

e C

oolin

g S

yste

m (

BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

V.D

2 E

-408

Pip

ing

, pip

ing

co

mp

on

ents

, an

d

pip

ing

ele

men

ts

An

y T

reat

ed w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

VII

AU

XIL

IAR

Y S

YS

TE

MS

C

1 O

pen-

Cyc

le C

oolin

g W

ater

Sys

tem

(S

ervi

ce W

ater

Sys

tem

)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VII.

C1

A-4

09

P

ipin

g, p

ipin

g

com

po

nen

ts, a

nd

p

ipin

g e

lem

ents

An

y R

aw w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

App

endi

x D

: M

ark-

up S

how

ing

Cha

nges

to th

e G

ALL

Rep

ort

D-3

V

II A

UX

ILIA

RY

SY

ST

EM

S

E1

Che

mic

al a

nd V

olum

e C

ontr

ol S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VII.

E1

A

-407

Pip

ing

, pip

ing

co

mp

on

ents

, an

d

pip

ing

ele

men

ts

An

y T

reat

ed w

ater

(b

ora

ted

) W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

VII

AU

XIL

IAR

Y S

YS

TE

MS

E

3 R

eact

or W

ater

Cle

anup

Sys

tem

(B

WR

)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VII.

E3

A

-408

Pip

ing

, pip

ing

co

mp

on

ents

, an

d

pip

ing

ele

men

ts

An

y T

reat

ed w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

VIII

S

TE

AM

AN

D P

OW

ER

CO

NV

ER

SIO

N S

YS

TE

M

D1

Fee

dwat

er S

yste

ms

(PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VIII

.D1

S-4

08

P

ipin

g, p

ipin

g

com

po

nen

ts, a

nd

p

ipin

g e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

VIII

S

TE

AM

AN

D P

OW

ER

CO

NV

ER

SIO

N S

YS

TE

M

D2

Fee

dwat

er S

yste

ms

(BW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

m

Ag

ing

Man

agem

ent

Pro

gra

m

(AM

P)

Fu

rth

er

Eva

luat

ion

VIII

.D2

S-4

08

P

ipin

g, p

ipin

g

com

po

nen

ts, a

nd

p

ipin

g e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

App

endi

x D

: M

ark-

up S

how

ing

Cha

nges

to th

e G

ALL

Rep

ort

D-4

V

III

ST

EA

M A

ND

PO

WE

R C

ON

VE

RS

ION

SY

ST

EM

G

A

uxili

ary

Fee

dwat

er S

yste

m (

PW

R)

Item

L

ink

Str

uct

ure

an

d/o

r C

om

po

nen

t M

ater

ial

En

viro

nm

ent

Ag

ing

Eff

ect/

M

ech

anis

mA

gin

g M

anag

emen

t P

rog

ram

(A

MP

)F

urt

her

E

valu

atio

n

VIII

.G

S-4

08

P

ipin

g, p

ipin

g

com

po

nen

ts, a

nd

p

ipin

g e

lem

ents

An

y T

reat

ed w

ater

W

all t

hin

nin

g

du

e to

ero

sio

n

Ch

apte

r X

I.M17

, “F

low

-A

ccel

erat

ed C

orr

osi

on

” N

o

Appendix D: Mark-up Showing Changes to the GALL Report

D-5

Table IX.E, Selected Use of Terms for Describing and Standardizing AGING EFFECTS

Term Usage in this document

Wall thinning Wall thinning is a specific type of loss of material attributed in the AMR line items to general corrosion, or flow-accelerated corrosion, and erosion mechanisms including cavitation, flashing, droplet impingement, or solid particle impingement.

Table IX.F, Selected Definitions & Use of Terms for Describing and Standardizing AGING MECHANISMS

Term Definition as used in this document

Erosion Erosion, or is the progressive loss of material from a solid surface, is due to the mechanical interaction between that a surface and a moving fluid, a multicomponent fluid, or solid particles carried by the fluid. Different forms of erosion include cavitation, flashing, droplet impingement, and solid particle impingement.

Flow-accelerated corrosion (FAC)

Flow-accelerated corrosion, also termed “erosion-corrosion,” is a co-joint activity involving corrosion and erosion in the presence of a moving corrosive fluid, leading to the accelerated loss of material. Susceptibility may be determined using the review process outlined in Section 4.2 of NSAC-202L-R2 and R3 recommendations for an effective FAC program. is a corrosion mechanism which results in wall thinning of carbon steel components exposed to moving, high temperature, low-oxygen water, such as PWR primary and secondary water, and BWR reactor coolant. FAC is the result of dissolution of the surface film of the steel which is transported away from the site of dissolution by the movement of water. [Ref. 27]

Appendix D: Mark-up Showing Changes to the GALL Report

D-6

XI.M17 FLOW-ACCELERATED CORROSION

Program Description

This program manages wall thinning caused by flow-accelerated corrosion (FAC) and may be used to manage wall thinning due to various erosion mechanisms. The program relies on implementation of the Electric Power Research Institute (EPRI) guidelines in the Nuclear Safety Analysis Center (NSAC)-202L-R2 or -R3 for an effective flow-accelerated corrosion (FAC) program. The program includes performing (a) an analysis to determine critical locations, (b) limited baseline inspections to determine the extent of thinning at these locations, and (c) follow-up inspections to confirm the predictions, or repairing or replacing components as necessary. NSAC-202L-R2 or -R3 provides general guidelines for the FAC program. To provide reasonable assurance that all the aging effects caused by FAC are properly managed, the program includes the use of a predictive code, such as CHECWORKS, that uses the implementation guidance of NSAC-202L-R2 or -R3 to satisfy the criteria specified in 10 CFR Part 50, Appendix B, for development of procedures and control of special processes. With appropriate considerations, this program may also manage wall thinning caused by mechanisms other than FAC, in situations where periodic monitoring is used in lieu of eliminating the cause of various erosion mechanism(s).

Evaluation and Technical Basis

1. Scope of Program: The FAC program, described by the EPRI guidelines in NSAC-202L-R2 or -R3, includes procedures or administrative controls to assure that the structural integrity is maintained for carbon steel piping containing two-phase and single-phase fluids of all carbon steel lines containing high-energy fluids (two-phase as well as single-phase) is maintained. This program also covers Vvalve bodies that retaining pressure in these high-energy systems are also covered by the program. The FAC program was originally outlined in NUREG-1344 and was further described through the Nuclear Regulatory Commission (NRC) Generic Letter 89-08, “Erosion/Corrosion-Induced Pipe Wall Thinning.” The program may also include piping, piping components, and piping elements that are susceptible to erosion wall-thinning mechanisms such as cavitation, flashing, droplet impingement, or solid particle impingement in various water systems. Since there are no known materials that are immune to wall thinning due to erosion, piping and components of any material may be included in the erosion portion of the program.

2. Preventive Actions: The FAC program is an analysis, inspection, and verification program; no preventive action has been recommended in this program. However, it is noted that monitoring of water chemistry to control pH and dissolved oxygen content are effective in reducing FAC, and the selection of appropriate piping material, geometry, and hydrodynamic conditions, can be effective in reducing both FAC and erosion mechanisms.

3. Parameters Monitored/Inspected: The aging management program monitors the effects of loss of material wall thinning due to wall thinning FAC and erosion on the intended function of piping and components by measuring wall thickness.

4. Detection of Aging Effects: Degradation of piping and components occurs by wall thinning. For FAC, Tthe inspection program delineated in NSAC-202L-R2 or -R3 consists of identification of susceptible locations, as indicated by operating conditions or special considerations. This program specifies Uultrasonic or radiographic testing is used to detect wall thinning. A representative sample of components is selected based on the most susceptible locations for wall thickness measurements at a frequency in accordance with

Appendix D: Mark-up Showing Changes to the GALL Report

D-7

NSAC-202L guidelines to ensure that degradation is identified and mitigated before the component integrity is challenged. The extent and schedule of the inspections ensure detection of wall thinning before the loss of intended function.

For erosion mechanisms, the program includes the identification of susceptible locations based on the extent-of-condition reviews from corrective actions in response to plant-specific or industry operating experience. Components in this category may be treated in a manner similar to other “susceptible-not-modeled” lines discussed in NSAC-202L-R2 or -R3. EPRI 1011231 provides guidance for identifying potential damage locations. EPRI TR-112657, “Revised Risk-Informed Inservice Inspection Evaluation Procedure,” Revision B-A, or NUREG/CR-6031, “Cavitation Guide for Control Valves,” provides additional insights for cavitation. For cavitation, in addition to wall-thinning, the extent-of-condition review may need to consider the consequences of vibrational loading caused by cavitation.

5. Monitoring and Trending: For FAC mechanisms, CHECWORKS or a similar predictive code estimates component degradation in the systems conducive to FAC, as indicated by specific plant data, including material, hydrodynamic, and operating conditions. CHECWORKS is acceptable because it provides a bounding analysis for FAC. The analysis is bounding because in general the predicted wear rates and component thicknesses are conservative when compared to actual field measurements. CHECWORKS was developed and benchmarked by comparing CHECWORKS predictions against actual component thickness measurements obtained from many plants. Data from each component inspection is used to calibrate the wear rates calculated in the predictive model with the observed field data. It is recognized that CHECWORKS is not always conservative in predicting component thickness; therefore, when measurements show the predictions to be non-conservative, the model must be re-calibrated using the latest field data. CHECWORKS was developed and benchmarked by comparing CHECWORKS predictions against actual measured component thickness measurements obtained from many plants. The use of such a predictive code to develop an inspection schedule developed by the licensee on the basis of the results of such a predictive code provides reasonable assurance that structural integrity will be maintained between inspections. The program includes the evaluation of Iinspection results are evaluated to determine if additional inspections are needed to ensure that the extent of wall thinning is adequately determined, that intended function will not be lost, and that corrective actions are adequately identified. Previous wear rate predictions due to FAC may change after a power uprate is implemented. The program includes updating Wwear rates are updated in CHECWORKS according to power uprate conditions. Subsequent field measurements are used to calibrate or benchmark the predicted wear rates.

For erosion mechanisms, the program includes trending of wall thickness measurements at susceptible locations to adjust the monitoring frequency and to predict the remaining service life of the component for scheduling repairs or replacements. Inspection results are evaluated to determine if assumptions in the extent-of-condition review remain valid. If degradation is associated with infrequent operational alignments, such as surveillances or pump starts/stops, then trending activities may need to consider the number or duration of these occurrences. Periodic wall thickness measurements of replacement components may be required and should continue until the effectiveness of corrective actions has been confirmed.

6. Acceptance Criteria: Inspection results are input for a predictive computer code, such as CHECWORKS, to calculate the number of refueling or operating cycles remaining before the component reaches the minimum allowable wall thickness. If calculations indicate that an

Appendix D: Mark-up Showing Changes to the GALL Report

D-8

area will reach the minimum allowed wall thickness before the next scheduled outage, corrective action should be considered. Components are suitable for continued service if calculations determine that the predicted wall thickness at the next scheduled inspection is greater than or equal to the minimum allowable wall thickness. The minimum allowable wall thickness is typically the thickness needed to satisfy the hoop stress allowable under the original code of construction, but additional code requirements may also need to be met. A reasonable safety factor should be applied to the predicted wear rate determination to account for inaccuracies in the wear rate calculations and may need to consider uncertainties of ultrasonic testing measurements. As discussed in NSAC-202L-R3, the minimum safety factor should never be less than 1.1.

7. Corrective Actions: The program includes reevaluation, repair or replacement of Prior to service, components for which the acceptance criteria are not satisfied, prior to their return to service are reevaluated, repaired, or replaced. For FAC, Llong-term corrective actions could include adjusting operating parameters or selecting replacing components with FAC-resistant materials resistant to FAC. However, if the wear mechanism has not been identified, then the replaced components should remain in the inspection program because FAC-resistant materials do not protect against other damage mechanisms. When susceptible components are replaced with FAC-resistant materials, such as high Cr material, the susceptible components immediately downstream components should be monitored closely to mitigate identify any increased wear due to the “entrance effect” as discussed in EPRI 1015072.

For erosion mechanisms, long-term corrective actions to eliminate the cause could include adjusting operating parameters or changing component designs; however, the effectiveness of these corrective actions should be verified. Periodic monitoring activities should continue for any components replaced with an alternate material, since a material that is completely erosion resistant is not available. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the corrective actions.

8. Confirmation Process: Site quality assurance (QA) procedures, review and approval processes, and administrative controls are implemented in accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the confirmation process.

9. Administrative Controls: Site QA procedures, review and approval processes, and administrative controls are implemented in accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in the Appendix for the GALL Report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the administrative controls.

10. Operating Experience: Wall-thinning problems in single-phase systems have occurred in feedwater and condensate systems (NRC IE Bulletin No. 87-01; NRC Information Notice [IN] 81-28, IN 92-35, IN 95-11, IN 2006-08) and in two-phase piping in extraction steam lines (NRC IN 89-53, IN 97-84) and moisture separatorion reheater and feedwater heater drains (NRC IN 89-53, IN 91-18, IN 93-21, IN 97-84). Observed wall thinning may be due to mechanisms other than FAC, which require alternate materials to resolve the issue or less commonly, due to a combination of mechanisms (NRC IN 99-19, Licensee Event Report (LER) 483/1999-003-01, LER 277/2006-003-00, LER 50-237/2007-003-00, LER 254/2009-004-00).

Appendix D: Mark-up Showing Changes to the GALL Report

D-9

References

10 CFR Part 50, Appendix B, Quality Assurance Criteria for Nuclear Power Plants, Office of the Federal Register, National Archives and Records Administration, 2009.

10 CFR Part 50.55a, Codes and Standards, Office of the Federal Register, National Archives and Records Administration, 2009.

EPRI 1011231, Recommendations for Controlling Cavitation, Flashing, Liquid Droplet Impingement, and Solid Particle Erosion in Nuclear Power Plant Piping Systems, Electric Power Research Institute, Palo Alto, CA, November 2004.

EPRI 1015072, Flow-Accelerated Corrosion – The Entrance Effect, Electric Power Research Institute, Palo Alto, CA, November 2007.

EPRI TR-112657, Revised Risk-Informed Inservice Inspection Evaluation Procedure, Revision B-A, Electric Power Research Institute, Palo Alto, CA, December 1999, Agencywide Documents Access and Management System (ADAMS) Accession No. ML013470102.

Licensee Event Report 483/1999-003-01, Callaway, Manual Reactor Trip due to Heater Drain System Pipe Rupture Caused by Flow Accelerated Corrosion, May 1, 2000, ADAMS Accession No. ML003712775.

Licensee Event Report 277/2006-003-00, Peach Bottom Unit 2, Elbow Leak on Piping Attached to Suppression Pool Results in Loss of Containment Integrity, Exelon Nuclear, December 4, 2006, ADAMS Accession No. ML063420059.

Licensee Event Report 237/2007-003-00, Dresden Unit 2, High Pressure Coolant Injection System Declared Inoperable, September 24, 2007, ADAMS Accession No. ML072750663.

Licensee Event Report 254/2009-004-00, Quad Cities Unit 1, Pinhole Leak in Core Spray Piping Results in Loss of Containment Integrity and Plant Shutdown for Repairs, November 6, 2009, ADAMS Accession No. ML093170206.

NRC Generic Letter 89-08, Erosion/Corrosion-Induced Pipe Wall Thinning, U.S. Nuclear Regulatory Commission, May 2, 1989.

NRC IE Bulletin 87-01, Thinning of Pipe Walls in Nuclear Power Plants, U.S. Nuclear Regulatory Commission, July 9, 1987.

NRC Information Notice 89-53, Rupture of Extraction Steam Line on High Pressure Turbine, U.S. Nuclear Regulatory Commission, June 13, 1989.

NRC Information Notice 91-18, High-Energy Piping Failures Caused by Wall Thinning, U.S. Nuclear Regulatory Commission, March 12, 1991.

NRC Information Notice 91-18, Supplement 1, High-Energy Piping Failures Caused by Wall Thinning, U.S. Nuclear Regulatory Commission, December 18, 1991.

NRC Information Notice 92-35, Higher than Predicted Erosion/Corrosion in Unisolable Reactor Coolant Pressure Boundary Piping inside Containment at a Boiling Water Reactor, U.S. Nuclear Regulatory Commission, May 6, 1992.

NRC Information Notice 93-21, Summary of NRC Staff Observations Compiled during Engineering Audits or Inspections of Licensee Erosion/Corrosion Programs, U.S. Nuclear Regulatory Commission, March 25, 1993.

Appendix D: Mark-up Showing Changes to the GALL Report

D-10

NRC Information Notice 95-11, Failure of Condensate Piping Because of Erosion/Corrosion at a Flow Straightening Device, U.S. Nuclear Regulatory Commission, February 24, 1995.

NRC Information Notice 97-84, Rupture in Extraction Steam Piping as a Result of Flow- Accelerated Corrosion, U.S. Nuclear Regulatory Commission, December 11, 1997.

NRC Information Notice 99-19, Rupture of the Shell Side of a Feedwater Heater at the Point Beach Nuclear Plant, U.S. Nuclear Regulatory Commission, June 23, 1999.

NRC Information Notice 2006-08, Secondary Piping Rupture at the Mihama Power Station in Japan, U.S. Nuclear Regulatory Commission, March 16, 2006.

NSAC-202L-R2, Recommendations for an Effective Flow Accelerated Corrosion Program, Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, April 8, 1999.

NSAC-202L-R3, Recommendations for an Effective Flow Accelerated Corrosion Program, (1011838), Electric Power Research Institute, Nuclear Safety Analysis Center, Palo Alto, CA, May 2006.

NUREG-1344, Erosion/Corrosion-Induced Pipe Wall Thinning in U.S. Nuclear Power Plants, P.C. Wu, U.S. Nuclear Regulatory Commission, April 1989.

NUREG/CR-6031, Cavitation Guide for Control Valves, J. P. Tullis, U.S. Nuclear Regulatory Commission, April 1993.

NRC Information Notice 2006-08, Secondary Piping Rupture at the Mihama Power Station in Japan, U.S. Nuclear Regulatory Commission, March 16, 2006.

NRC Licensee Event Report 50‑ 237/2007‑ 003‑ 00, Unit 2 High Pressure Coolant Injection System Declared Inoperable, U.S. Nuclear Regulatory Commission, September 24, 2007.

NRC Licensee Event Report 1999-003-01, Manual Reactor Trip due to Heater Drain System Pipe Rupture Caused by Flow Accelerated Corrosion, U.S. Nuclear Regulatory Commission, May 1, 2000

Appendix E

Resolution of Public Comments on Draft LR-ISG-2012-01

Appendix E: Resolution of Public Comments on Draft LR-ISG-2012-01

E-2

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-3

Not

e: T

he N

ucle

ar E

nerg

y In

stitu

te (

NE

I) s

ubm

itted

com

men

ts b

y le

tter

date

d A

ugus

t 27,

201

2 (A

DA

MS

Acc

essi

on N

o.

ML1

2244

A0

04),

whi

ch in

tegr

ated

mul

tiple

indu

stry

com

men

ts o

n th

e su

bjec

t LR

-IS

G, i

nclu

ding

thos

e su

bmitt

ed s

epar

atel

y by

Wol

f C

reek

Nuc

lear

Ope

ratin

g C

orpo

ratio

n in

a le

tter

date

d A

ugus

t 23,

201

2 (A

DA

MS

Acc

essi

on N

o. M

L122

50A

668)

. N

EI’s

sub

mitt

al

lette

r co

ntai

ns tw

o se

para

te a

ttach

men

ts.

In th

e ta

ble

belo

w, t

he fi

rst c

olum

n, N

o., r

efe

rs to

the

atta

chm

ent n

umbe

r (e

ither

1 o

r 2)

fo

llow

ed b

y th

e co

mm

ent

num

ber

from

NE

I’s c

omm

ent l

ette

r. T

he “

Com

men

t” a

nd “

Pro

pose

d R

esol

utio

n” c

olum

ns a

re fr

om N

EI’s

co

mm

ent l

ette

r. T

he “

Sta

ff R

espo

nse”

col

umn

is s

elf-

expl

anat

ory.

N

o.

Com

men

t P

ropo

sed

Res

olut

ion

S

taff

Res

pons

e 1-

1

G

ener

al:

The

incl

usio

n or

add

ition

of

mec

hani

cal e

rosi

on m

echa

nis

ms

into

the

FA

C

AM

P X

I.M17

wou

ld b

e co

nfus

ing

and

poss

ibly

de

trim

ent

al to

the

curr

ent

ly w

ell

boun

ded

and

st

ruct

ured

indu

stry

FA

C p

rogr

ams.

The

su

scep

tibili

ty b

ases

of i

ndus

try

FA

C p

rogr

ams

are

cle

arly

def

ined

and

the

incl

usio

n of

ero

sion

m

echa

nism

s w

ould

cro

ss m

any

of th

ose

bou

ndar

ies.

Thi

s w

oul

d re

sult

in th

e F

AC

pr

ogra

m h

avin

g tw

o se

para

te s

ets

of

susc

eptib

ility

cri

teria

for

FA

C a

nd e

rosi

on, a

s w

ell

as s

epar

ate

met

hods

for

sele

ctin

g in

spec

tions

an

d st

rate

gies

; th

eref

ore,

it m

akes

se

nse

to r

esp

ond

by

crea

ting

a se

para

te e

rosi

on

prog

ram

rat

her

than

mix

ing

it in

to th

e cu

rre

nt

prog

ram

. T

he in

clus

ion

or

addi

tion

of m

echa

nica

l ero

sion

m

echa

nism

s in

to th

e F

AC

AM

P (

XI.M

17)

wo

uld

sign

ifica

ntly

de

trac

t fro

m th

e ef

fect

iven

ess

of th

e cu

rren

t in

dust

ry F

AC

pro

gram

s in

that

the

scop

e of

the

curr

ent p

rogr

ams

wo

uld

req

uire

exp

ansi

on

aw

ay

from

the

focu

sed

“FA

C s

usce

ptib

le”

syst

ems

and

com

pone

nts

to th

e in

corp

orat

ion

of

virt

ually

all

pip

ing

syst

ems

into

the

prog

ram

re

gard

less

of t

heir

susc

eptib

ility

to F

AC

. A

dditi

ona

lly s

igni

fica

nt c

han

ges

to th

e cu

rren

t F

AC

pro

gram

str

uctu

res

alo

ng w

ith n

ew

gu

idan

ce w

oul

d be

ne

eded

to fa

cilit

ate

new

m

etho

dol

ogi

es r

equ

ired

for

rank

ing

of

susc

eptib

le lo

catio

ns, n

ew

or

upd

ated

“fit

ness

fo

r se

rvic

es”

met

hod

olog

ies

for

dete

rmin

atio

n o

f re

mai

nin

g se

rvic

e lif

e (i.

e. –

lin

ear

vs. n

on-l

inea

r w

ear

) a

nd g

uid

ance

for

reco

mm

end

ed m

itig

atio

n st

rate

gies

.

Cre

ate

a se

para

te A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms.

If

a se

para

te A

MP

is n

ot c

reat

ed, c

onsi

der

revi

sin

g X

I.M38

- In

spec

tion

of In

tern

al

Sur

face

s in

Mis

cella

neou

s P

ipin

g an

d D

uctin

g C

omp

one

nts

inst

ead.

C

reat

e p

lant

sp

ecifi

c pr

ogr

am A

MR

[agi

ng

man

age

me

nt r

evie

w] l

ines

or

crea

te a

sep

arat

e A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms

in

ES

F a

nd S

tea

m &

Po

wer

Co

nver

sion

Sys

tem

s.

Con

side

r m

ana

gem

ent

of e

rosi

on in

saf

ety

rela

ted

cool

ing

wat

er s

yste

ms

with

AM

P X

I.M20

O

pen-

Cyc

le C

oolin

g W

ater

Sys

tem

.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Mec

hani

cal e

rosi

on

mec

hani

sms

hav

e be

en d

ete

cted

and

are

bei

ng

man

age

d b

y se

vera

l site

s th

at

have

rec

ently

su

bmitt

ed li

cen

se r

ene

wa

l app

licat

ions

(LR

As)

th

roug

h th

e F

AC

or

Ope

n-C

ycle

Co

olin

g W

ater

S

yste

m A

MP

s. T

he s

taff,

how

eve

r, is

un

aw

are

of a

ny

site

that

has

pre

viou

sly

prop

osed

a

sepa

rate

AM

P to

add

ress

me

chan

ical

ero

sio

n m

echa

nism

s.

T

he s

taff

caut

ions

, as

note

d in

the

LR-I

SG

, tha

t G

ALL

Rep

ort A

MP

XI.M

20 im

plem

ents

the

reco

mm

end

atio

ns o

f Gen

eric

Let

ter

89-1

3,

wh

ich

only

add

ress

ed e

rosi

on

due

to th

e pr

ese

nce

of s

olid

par

ticle

s in

ra

w w

ate

r sy

stem

s.

As

such

, if m

echa

nis

ms

othe

r th

an

solid

par

ticle

ero

sio

n ar

e b

ein

g m

ana

ged

by

GA

LL R

epor

t AM

P X

I.M20

, the

n th

is is

in

cons

iste

nt w

ith th

e G

ALL

Re

port

, and

an

enh

ance

men

t for

the

AM

P s

houl

d be

incl

ude

d in

the

LRA

. T

his

LR-I

SG

ref

lect

s on

e a

ppro

ach

to m

anag

e er

osio

n m

ech

ani

sms

that

is a

ccep

tab

le to

the

staf

f and

doe

s no

t pre

clud

e a

n ap

plic

ant

from

cr

eatin

g a

plan

t-sp

ecifi

c A

MP

or

from

man

agin

g er

osio

n m

ech

ani

sms

thro

ugh

an

exi

stin

g A

MP

b

y m

akin

g ap

pro

pria

te e

nha

nce

men

ts.

No

chan

ge w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

th

is c

omm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-4

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-2

G

ener

al:

LR

-IS

G-2

012-

01 d

oes

not a

ddre

ss a

ke

y co

nsid

erat

ion

of o

per

atin

g e

xper

ienc

e as

soci

ated

with

man

y of

the

eros

ion

rela

ted

ph

eno

me

na s

uch

[as]

dam

agin

g ca

vita

tion,

or

solid

par

ticle

impi

nge

me

nt. M

any

plan

ts h

ave

ch

ose

n to

“m

anag

e” o

r ad

dre

ss e

rosi

on

phe

nom

ena

with

a d

esig

n m

odi

ficat

ion

or in

so

me

case

s w

ith a

per

iodi

c re

plac

emen

t pr

ogra

m. B

oth

of th

ese

“man

age

me

nt”

tech

niqu

es a

re e

xam

ple

of o

per

atin

g e

xper

ienc

e th

at d

oes

requ

ire

an a

gin

g m

ana

gem

ent

prog

ram

.

Cre

ate

pla

nt s

pec

ific

pro

gram

AM

R li

nes

or

crea

te a

sep

arat

e A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms

in E

SF

and

Ste

am

& P

ow

er

Con

vers

ion

Sys

tem

s. C

onsi

der

man

age

me

nt

of

eros

ion

in s

afet

y re

late

d co

olin

g w

ate

r sy

stem

s w

ith A

MP

XI.M

20 O

pen-

Cyc

le C

oolin

g W

ater

S

yste

m.

The

sta

ff di

sag

rees

with

the

initi

al s

tate

me

nt in

th

e co

mm

ent a

nd th

e pr

opo

sed

reso

lutio

n.

As

stat

ed in

the

LR

-IS

G, i

f an

appl

ica

nt r

esol

ves

eros

ion

issu

es th

roug

h de

sign

or

oper

atio

nal

ch

ange

s, th

en n

o fu

rthe

r a

ge m

ana

gem

ent

ac

tiviti

es w

oul

d b

e re

quire

d.

Sim

ilarl

y, if

a

com

pone

nt is

per

iodi

cally

rep

lace

d b

ase

d on

a

fixe

d re

pla

cem

ent f

requ

enc

y, th

en th

e co

mpo

nent

do

es n

ot m

eet t

he d

efin

itio

n of

a

“lon

g-liv

ed”

com

pon

ent a

nd

it is

not

man

age

d fo

r ag

ing

in li

cens

e re

ne

wa

l. R

egar

ding

the

prop

osal

to c

reat

e a

pla

nt-s

peci

fic A

MP

, see

th

e st

aff r

espo

nse

to c

omm

ent

1-1

. N

o ch

ang

e w

as

mad

e to

the

LR-I

SG

in r

esp

onse

to th

is

com

men

t.

1-3

G

ener

al:

The

incl

usio

n or

add

ition

of

mec

hani

cal e

rosi

on m

echa

nis

ms

into

the

cle

arly

de

fined

and

bo

und

ed F

AC

AM

P (

XI.M

17)

wou

ld

requ

ire s

igni

fican

t pro

gram

ch

ang

es a

nd

conf

licts

with

NS

AC

202

L-R

3 an

d as

soci

ated

pr

edic

tive

code

s su

ch a

s C

HE

CK

WO

RK

S.

Dur

ing

agin

g m

ana

gem

ent

pro

gram

rev

iew

s se

vera

l exc

eptio

ns w

oul

d be

req

uire

d to

in

corp

orat

e m

ana

gem

ent o

f ero

sio

n in

to th

e F

AC

pro

gram

. F

or e

xam

ple

man

age

me

nt o

f er

osio

n in

co

olin

g w

ater

sys

tem

s an

d se

vera

l E

SF

sys

tem

s w

oul

d re

qui

re a

n e

xce

ptio

n to

the

FA

C p

rogr

am e

xem

ptio

ns fo

r flu

id te

mpe

ratu

res

less

than

200

F, s

yste

ms

with

hig

h le

vels

of

diss

olve

d o

xyg

en, a

nd s

yste

m w

ith s

tain

less

st

eel (

chro

me

cont

ent)

pip

ing

. In

addi

tion

NS

AC

20

2L-

R3

stat

es th

at if

wal

l thi

nni

ng

is b

eing

de

velo

ped

by

mec

hani

sm o

ther

than

FA

C, a

n ap

prop

riat

e in

spec

tion

pro

gra

m s

houl

d be

de

velo

ped

.

Cre

ate

pla

nt s

pec

ific

pro

gram

AM

R li

nes

or

crea

te a

sep

arat

e A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms

in E

SF

and

Ste

am

& P

ow

er

Con

vers

ion

Sys

tem

s. C

onsi

der

man

age

me

nt

of

eros

ion

in s

afet

y re

late

d co

olin

g w

ate

r sy

stem

s w

ith A

MP

XI.M

20 O

pen-

Cyc

le C

oolin

g W

ater

S

yste

m.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

sta

ff do

es n

ot e

xpec

t th

e ap

plic

ant t

o us

e th

e F

AC

pro

gram

to p

redi

ct

eros

ion.

R

athe

r, th

e LR

-IS

G a

llow

s th

e F

AC

pr

ogra

m to

mon

itor

com

pon

ent

s w

her

e er

osio

n ha

s be

en id

entif

ied,

sim

ilar

to o

ther

co

mpo

nent

s th

at a

re s

usce

ptib

le to

FA

C b

ut

cann

ot b

e m

odel

ed

usin

g th

e pr

edic

tive

soft

war

e of

the

FA

C p

rogr

am.

Reg

ard

ing

the

prop

osal

to c

reat

e a

sep

arat

e A

MP

, see

the

staf

f res

pons

e to

com

men

t 1-1

. N

o ch

ange

w

as

mad

e to

the

LR-I

SG

in r

esp

onse

to th

is

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-5

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-4

G

ener

al:

LR

-IS

G-2

012-

01 c

lear

ly d

efin

es F

AC

an

d er

osio

n as

tw

o d

iffer

ent a

gin

g m

echa

nism

s th

at c

ause

loss

of m

ater

ial.

De

tect

ion,

an

alys

is,

and

corr

ectiv

e ac

tion

asso

ciat

ed w

ith e

rosi

on

re

late

d ph

eno

men

a su

ch a

s da

ma

gin

g ca

vita

tion,

and

sol

id p

artic

le im

pin

gem

ent

are

be

yond

the

pre

dict

ive

too

ls o

f the

FA

C p

rogr

am.

GA

LL in

clud

es s

peci

aliz

ed a

ging

man

agem

ent

pr

ogra

m s

uch

as X

I.M33

Se

lect

ive

Leac

hing

and

X

I.M35

OT

I of A

SM

E C

ode

Cla

ss 1

Sm

all-B

ore

P

ipin

g fo

r un

ique

ag

ing

mec

han

ism

s a

nd/o

r co

mpo

nent

co

nsid

erat

ions

.

Cre

ate

pla

nt s

pec

ific

pro

gram

AM

R li

nes

or

crea

te a

sep

arat

e A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms

in E

SF

and

Ste

am

& P

ow

er

Con

vers

ion

Sys

tem

s. C

onsi

der

man

age

me

nt

of

eros

ion

in s

afet

y re

late

d co

olin

g w

ate

r sy

stem

s w

ith A

MP

XI.M

20 O

pen-

Cyc

le C

oolin

g W

ater

S

yste

m.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

LR

-IS

G a

llow

s th

e F

AC

pro

gram

to

mon

itor

com

pon

ents

wh

ere

er

osio

n ha

s be

en id

entif

ied,

sim

ilar

to o

ther

co

mpo

nent

s th

at a

re s

usce

ptib

le to

FA

C b

ut

cann

ot b

e m

odel

ed

usin

g th

e pr

edic

tive

soft

war

e of

the

FA

C p

rogr

am.

Reg

ard

ing

the

prop

osal

to c

reat

e a

pla

nt-s

peci

fic A

MP

, see

th

e st

aff r

espo

nse

to c

omm

ent

1-1

. N

o ch

ang

e w

as

mad

e to

the

LR-I

SG

in r

esp

onse

to th

is

com

men

t.

1-5

G

ener

al:

E

rosi

on→

Ero

sion

-cor

rosi

on→

Cor

rosi

on is

a

cont

inuu

m, m

ovi

ng fr

om a

pur

ely

mec

han

ical

ef

fect

to a

pur

ely

ele

ctro

chem

ical

effe

ct. F

AC

is

a sp

ecia

l cas

e of

ero

sio

n-co

rros

ion

sinc

e it

onl

y af

flict

s ca

rbon

ste

el u

nde

r ve

ry s

pec

ific

envi

ronm

ent

al c

ond

ition

s (i.

e.,

tem

pera

ture

, pH

, di

ssol

ved

oxy

gen

, all

of w

hic

h c

ontr

ol th

e so

lubi

lity

of m

agn

etite

and

its

susc

eptib

ility

to

rem

oval

by

turb

ulen

ce).

Add

on

e or

mo

re p

ara

grap

hs th

at s

tate

wh

at is

di

scus

sed

in th

e co

mm

ent,

notin

g th

at F

AC

pr

ogra

ms

have

bee

n sh

ow

n to

effe

ctiv

ely

addr

ess

FA

C; h

ow

eve

r, s

olut

ions

for

FA

C w

ill

not n

eces

saril

y be

effe

ctiv

e fo

r er

osio

n or

for

eros

ion-

corr

osio

n ph

enom

ena

of o

ther

m

ater

ials

.

The

sta

ff un

ders

tand

s th

e co

mm

ent,

but d

oes

not a

gre

e th

at th

e LR

-IS

G s

houl

d b

e re

vise

d.

The

effe

ctiv

enes

s of

the

FA

C p

rogr

am is

im

plie

d b

y its

exi

ste

nce

in th

e G

ALL

Rep

ort,

but

see

com

me

nt 1

-11

for

addi

tiona

l dis

cuss

ion

rega

rdin

g th

e e

ffect

iven

ess

of th

e F

AC

pr

ogra

m.

The

LR

-IS

G a

nd r

evi

sed

AM

P X

I.M17

cur

rent

ly d

istin

gui

sh b

etw

een

FA

C

and

eros

ion

and

clea

rly

stat

e th

at n

o m

ater

ial i

s co

mpl

etel

y re

sist

ant t

o er

osio

n m

echa

nism

s.

No

cha

nge

wa

s m

ade

to th

e LR

-IS

G in

re

spon

se t

o th

is c

omm

ent.

1-

6

Gen

era

l: W

here

trea

ted

wat

er is

mon

itore

d fo

r pa

rtic

ula

tes,

ero

sio

n w

ould

on

ly b

e du

e to

ca

vita

tion

in a

sin

gle

phas

e e

nviro

nmen

t or

only

be

du

e to

dro

ple

t im

pin

gem

en

t or

flas

hing

in a

tw

o ph

ase

envi

ronm

ent

.

Con

side

r a

ddin

g th

is k

ind

of

guid

ance

/info

rmat

ion.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

SR

P-L

R

Sec

tions

3.1

.2.2

.8 a

nd 3

.2.2

.2.4

des

crib

e er

osio

n in

trea

ted

wat

er th

at is

not

due

to

cavi

tatio

n or

dro

plet

impi

nge

men

t. N

o ch

ang

e w

as

mad

e to

the

LR-I

SG

in r

esp

onse

to th

is

com

men

t.

1-7

P

age

2, 1

st p

arag

raph

3rd

se

nten

ce:

The

C

HE

CW

OR

KS

TM s

oftw

are

does

not

spe

cific

ally

“id

ent

ify lo

catio

ns s

usce

ptib

le t

o w

all

thin

ning

” or

“p

redi

ct s

usce

ptib

le lo

catio

ns r

elat

ed

to e

rosi

on.”

S

usce

ptib

ility

is d

efin

ed

and

docu

men

ted

by

prog

ram

s en

gin

eers

bas

ed

on

spec

ific

crite

ria

and

the

soft

wa

re e

valu

ates

or

pred

icts

a r

ela

tive

rate

of F

AC

we

ar fo

r ea

ch c

om

pon

ent i

n th

e

susc

eptib

le li

nes.

Re

wor

d:

For

exa

mpl

e, th

e “m

onito

ring

and

tren

ding

” pr

ogra

m e

lem

ent

of G

ALL

Rep

ort A

MP

XI.M

17

incl

ude

s th

e us

e of

sof

twar

e to

iden

tify

loca

tions

m

ost

sus

cept

ible

to w

all

thin

nin

g du

e to

FA

C,

but t

he s

oftw

are

doe

s n

ot id

enti

fy l

oca

tio

ns

mo

st s

usc

epti

ble

to

ero

sio

n.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-6

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-8

P

age

2, 1

st p

arag

raph

in C

larif

icat

ion:

The

st

atem

ent “

FA

C is

a p

ure

corr

osio

n pr

oces

s th

at

does

not

hav

e an

ero

sion

co

mpo

nen

t” is

no

t co

rrec

t. W

hile

ele

ctro

chem

ica

l con

diti

ons

ma

ke

the

“win

dow

” w

here

FA

C w

ill b

e op

erat

ive

very

sm

all,

if th

ere

is n

o tu

rbul

ence

, the

re is

no

FA

C

and

ther

e is

on

ly m

inim

al d

isso

lutio

n.

1. R

evis

e th

e in

corr

ect

stat

emen

t.

2. D

efin

e th

e (p

ure

ly m

echa

nica

l) er

osio

n to

the

(p

urel

y el

ectr

och

emic

al)

corr

osio

n co

ntin

uum

di

scus

sed

abo

ve. P

rope

rly

no

te w

her

e F

AC

lies

in

that

con

tinuu

m a

nd w

hy

FA

C o

nly

occu

rs fo

r a

sing

le m

ater

ial c

lass

und

er s

peci

al

envi

ronm

ent

al c

ond

ition

s

The

cite

d st

atem

ent h

as b

een

del

ete

d an

d re

plac

ed w

ith: “

NS

AC

20

2L-R

3 st

ates

that

FA

C

is s

omet

imes

, but

inco

rrec

tly,

calle

d er

osio

n co

rros

ion

and

note

s th

at e

rosi

on is

not

par

t of

the

FA

C d

egra

datio

n m

ech

anis

m.”

1-9

P

age

3, 2

nd p

arag

raph

in C

hang

es:

The

end

of

the

seco

nd

para

gra

ph in

the

“Cha

nges

to F

AC

A

MP

” se

ctio

n, th

ere

is a

ref

ere

nce

to C

alla

wa

y 19

99;

this

is o

bvi

ousl

y a

refe

renc

e to

the

failu

re

OE

fro

m C

alla

wa

y. T

his

OE

eve

nt w

as a

ttrib

uted

in

par

t by

both

FA

C a

nd E

rosi

on m

ech

anis

ms.

T

here

is s

till a

dis

agr

eem

ent i

n th

e in

dus

try

betw

een

the

site

, and

EP

RI,

as

to w

het

her

the

repo

rt o

n th

is is

sue

perf

orm

ed

by

an o

utsi

de

vend

or is

acc

urat

e.

Con

side

r co

mm

ents

by

EP

RI,

whi

ch h

ave

bee

n co

mm

unic

ated

bet

we

en th

e cu

rren

t Cal

law

ay

site

FA

C P

rogr

am E

ngin

eer

, and

EP

RI e

xper

ts

on F

AC

and

Wal

l Thi

nnin

g m

ech

anis

ms.

The

y ha

ve e

xte

nsiv

ely

rev

iew

ed

this

OE

, and

are

re

visi

ting

the

inci

dent

to s

uppo

rt th

e co

mm

ents

to

thi

s IS

G.

The

sta

ff ca

nnot

con

sid

er c

om

men

ts th

at

addr

ess

futu

re u

nkn

ow

n ac

tions

of t

he in

dus

try.

T

he L

R-I

SG

is b

ase

d on

doc

kete

d co

rres

pon

den

ce in

an

LER

fro

m M

ay

2000

. T

he s

taff

will

con

side

r ch

ang

es to

that

in

form

atio

n w

hen

a s

uppl

eme

nt to

the

LER

is

issu

ed.

N

o ch

ang

e w

as m

ad

e to

the

LR-I

SG

in

resp

onse

to th

is c

omm

ent.

1-10

P

age

3, C

larif

icat

ions

to D

efin

ition

s, la

st

para

grap

h: T

his

para

grap

h is

com

plet

ely

corr

ect,

how

ever

, it d

oes

not o

ffer

a so

lutio

n.

1. C

lear

ly d

efin

e er

osio

n, e

rosi

on-c

orro

sion

, co

rros

ion

(an

d F

AC

) as

not

ed a

bove

. 2.

Not

e th

at e

rosi

on,

in v

ario

us

form

s (c

avita

tion,

par

ticle

s, e

t al.)

will

cau

se m

eta

l lo

ss.

3.

Lic

ense

es m

ust d

emon

stra

te th

at th

eir

prog

ram

s ad

dres

s ar

eas

of “

pur

e” e

rosi

on in

te

rms

of p

redi

ctio

n, in

spec

tion

, an

d re

solu

tion.

The

sta

ff un

ders

tand

s th

e co

mm

ent b

ut

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

The

LR

-IS

G c

urre

ntly

sta

tes

that

ero

sio

n is

a

prog

ress

ive

loss

of m

ater

ial.

The

def

initi

on

cann

ot b

e lim

ited

to m

etal

loss

, sin

ce e

rosi

on

is

also

ass

ocia

ted

with

de

gra

datio

n of

con

cret

e,

elas

tom

ers,

an

d ea

rthe

n st

ruct

ures

. R

egar

din

g th

e “p

red

ictio

n, in

spec

tion,

an

d re

solu

tion”

of

eros

ion,

thes

e as

pect

s ar

e a

ddr

esse

d in

the

“det

ectio

n of

agi

ng

effe

cts,

” “m

onito

ring

and

tr

endi

ng,”

an

d “c

orre

ctiv

e ac

tions

” pr

ogra

m

elem

ents

of t

he r

evis

ed

AM

P.

Cla

rific

atio

ns

we

re a

dde

d to

eac

h pr

ogra

m e

lem

ent t

o cl

earl

y de

line

ate

betw

een

activ

ities

for

FA

C a

nd

activ

ities

for

eros

ion

mec

hani

sms.

N

o ot

her

chan

ges

wer

e m

ade

to th

e L

R-I

SG

in r

espo

nse

to t

his

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-7

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-11

P

age

3, C

han

ges

to th

e F

AC

AM

P, 3

rd

para

grap

h:

“Lin

es th

at a

re b

ein

g m

oni

tore

d fo

r w

all

thin

nin

g d

ue to

ero

sion

mec

hani

sms

ma

y be

in

clu

ded

with

thes

e ot

her

no

n-m

odel

ed (

per

the

FA

C p

rogr

am)

lines

and

tre

ated

in a

com

para

ble

fash

ion.

”

Add

a c

lear

ly w

orde

d se

nte

nce

or p

ara

gra

ph

that

sta

tes

that

sol

utio

ns to

(pu

re)

eros

ion

cond

ition

s w

ill b

e di

ffere

nt th

an

solu

tions

to

FA

C, s

o th

e tw

o de

grad

atio

n m

echa

nism

s m

ust

be a

ddr

esse

d se

para

tely

, but

that

the

exis

ting

and

we

ll es

tabl

ishe

d F

AC

pro

gram

an

d m

etho

dol

og

y p

rovi

des

a u

sefu

l wa

y to

pla

n in

spec

tions

, re

cord

an

d tr

end

data

, etc

.

The

sta

ff ag

ree

s in

par

t w

ith th

e pr

opos

ed

reso

lutio

n fo

r e

rosi

on

con

ditio

ns.

The

sta

ff be

lieve

s th

at th

e pa

ragr

aph

ab

ove

the

one

with

th

e ci

ted

sent

enc

e pr

ovid

es s

uffic

ient

gu

idan

ce

rega

rdin

g di

ffere

nt s

olut

ions

to e

rosi

on

from

F

AC

. H

ow

ever

, th

e st

aff a

dded

the

follo

win

g se

nten

ce in

the

LR

-IS

G to

add

ress

usi

ng

the

exis

ting

FA

C p

rogr

am:

“Ho

wev

er, t

he e

xist

ing

FA

C p

rogr

am p

rovi

des

a us

eful

met

hodo

log

y to

pl

an

and

perf

orm

com

pon

ent i

nspe

ctio

ns, a

nd

to r

ecor

d an

d tr

end

insp

ectio

n da

ta.”

In

ad

diti

on, t

he s

taff

chan

ged

the

“cor

rect

ive

actio

ns”

prog

ram

ele

me

nt o

f the

AM

P to

cle

arl

y di

stin

guis

h be

twe

en

actio

ns fo

r F

AC

and

ac

tions

for

ero

sion

.

1-12

P

age

3, 3

rd fu

ll pa

ragr

aph,

last

sen

tenc

e.

The

op

erat

ing

exp

erie

nce

at C

alla

wa

y (i

n 1

999)

and

D

resd

en (

in 2

007

) ar

e ci

ted

as

exam

ples

of

com

bine

d F

AC

and

ero

sio

n. C

alla

wa

y m

ay

hav

e be

en

an e

xam

ple

but

it is

not

cle

ar fr

om th

e la

b an

aly

sis

that

it w

as.

The

Dre

sden

ope

ratin

g ex

peri

ence

cou

ld n

ot h

ave

con

tain

ed

an F

AC

el

emen

t sin

ce t

he m

ater

ial w

as

FA

C-r

esis

tan

t P

11 c

hrom

e-m

oly

stee

l.

Re

wor

d:

The

sta

ff’s

revi

ew

of o

pera

ting

exp

erie

nce

has

sh

ow

n th

at, i

n so

me

case

s, w

all t

hinn

ing

is m

ay

be

caus

ed b

y a

com

bina

tion

of m

echa

nis

ms,

w

hic

h in

clud

es F

AC

and

som

e ty

pe o

f ero

sio

n (C

alla

wy

199

9, D

resd

en

2007

).

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

Cal

law

ay

even

t is

disc

usse

d in

com

men

t 1-9

. F

or th

e D

resd

en

even

t, al

thou

gh

the

seco

nd fa

ilure

in 2

007

wa

s no

t cau

sed

by

FA

C b

ecau

se o

f the

mat

eria

l, th

e co

mpo

nent

initi

ally

faile

d in

19

96 w

hen

it w

as

carb

on

stee

l. T

he a

ssoc

iate

d L

ER

(23

7/1

996-

007)

sta

tes

tha

t pi

pin

g fa

iled

due

to F

AC

as

dete

rmin

ed b

y an

insp

ectio

n.

Bas

ed o

n th

e su

bse

quen

t 20

07 e

vent

, the

pro

blem

wa

s re

aso

nab

ly d

ue

a co

mbi

natio

n of

mec

han

ism

s.

No

cha

nge

wa

s m

ade

to th

e LR

-IS

G in

re

spon

se t

o th

is c

omm

ent,

but s

ee c

omm

ent

1-32

for

a re

late

d ch

ang

e to

XI.M

17.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-8

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-13

P

age

3, 3

rd p

arag

raph

in “

Cha

nges

to F

AC

A

MP

”:

Whi

le m

any

FA

C s

usce

ptib

le lo

catio

ns

are

mod

ele

d a

nd w

ear

pre

dict

ed u

sin

g so

ftw

are

such

as

CH

EC

WO

RK

S, a

ver

y la

rge

por

tion

of

the

prog

ram

sco

pe is

incl

ude

d in

the

SN

M (

Non

-m

ode

led)

eva

luat

ion.

The

val

ue a

dde

d b

y th

e ne

w C

HE

CW

OR

KS

ero

sion

mod

ule

wh

ich

is

soon

to b

e re

leas

ed w

ill b

e m

inim

al a

nd o

nly

usef

ul in

the

SS

E (

mod

eled

) sc

ope.

EP

RI T

R

101

1231

an

d 1

126

57 a

re d

iscu

ssed

and

co

mpa

red

as b

ein

g us

ed

toge

ther

for

eros

ion

m

onito

ring

.

Don

’t co

unt o

n th

e us

e of

an

y m

odifi

catio

ns t

o cu

rren

tly u

sed

prog

ram

sof

twar

e, s

uch

as

CH

EC

WO

RK

S, t

o gr

eatly

imp

rove

the

indu

stry

’s a

bilit

y to

pre

dict

or

insp

ect

for

pote

ntia

l mec

han

ical

ero

sio

n in

duce

d w

all

thin

nin

g. C

omp

one

nts

wh

ich

will

be

mon

itore

d fo

r er

osio

n th

inni

ng

sho

uld

not

be

trea

ted

sim

ilarl

y to

SN

M, a

s su

gges

ted

in th

e IS

G.

SN

M c

ompo

nent

s in

spec

tions

are

str

ateg

ica

lly

chos

en

at k

now

n lik

ely

pro

blem

are

as b

ase

d up

on

com

pon

ent

geo

met

ry, a

nd th

en

gen

eral

ities

are

mad

e fo

r th

e w

all

thin

nin

g of

th

e co

mpo

nent

s an

d lin

es. C

hoo

sing

loca

tion

s w

hic

h ar

e m

ore

likel

y to

exp

erie

nce

eros

ion

and

actu

ally

find

ing

an

ythi

ng

of v

alue

wo

uld

be v

ery

un

likel

y.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

LR

-IS

G e

xpec

ts

licen

sees

to id

entif

y ad

diti

ona

l loc

atio

ns

susc

eptib

le to

ero

sion

as

par

t of t

he e

xte

nt o

f co

nditi

on fo

llow

ing

the

iden

tific

atio

n of

an

eros

ion

con

ditio

n. T

he in

clus

ion

of c

ompo

nent

s be

ing

mon

itore

d fo

r er

osio

n w

ith S

NM

co

mpo

nent

s sh

ould

not

cha

nge

how

lice

nsee

s im

plem

ent t

he S

NM

por

tion

of th

e cu

rren

t pr

ogra

m.

The

exi

stin

g F

AC

pro

gram

m

etho

dol

og

y p

rovi

des

a u

sefu

l wa

y to

pla

n in

spec

tions

, an

d re

cord

and

tren

d d

ata

for

man

agi

ng

loss

of m

ater

ial d

ue to

wa

ll th

inni

ng.

N

o ch

ang

es w

ere

mad

e in

re

spon

se to

this

co

mm

ent.

1-14

P

age

3, 4

th p

arag

raph

, las

t se

nten

ce:

Thi

s se

nten

ce d

iscu

sses

lin

es b

ein

g m

onito

red

for

eros

ion

dam

age.

Mos

t ero

sio

n m

echa

nism

s ar

e ca

use

d b

y lo

caliz

ed c

ond

itio

ns.

As

such

, the

y ar

e co

mp

onen

t is

sues

an

d no

t lin

e is

sues

. For

ex

amp

le, c

avita

tion

ma

y oc

cur

dow

nstr

eam

of a

flo

w c

ontr

ol v

alve

but

it w

ill n

ot

be a

con

cern

th

roug

hout

the

entir

e lin

e.

Re

wor

d:

Lin

es o

r lo

cati

on

s th

at a

re b

ein

g m

onito

red

for

wa

ll th

inn

ing

due

to e

rosi

on m

echa

nism

s m

ay

be in

clud

ed w

ith th

ese

oth

er n

on-m

ode

led

lines

an

d tr

eate

d in

a c

ompa

rabl

e fa

shio

n.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-15

P

age

4, 1

st p

arag

raph

, las

t se

nten

ce:

Alth

ou

gh

this

sen

tenc

e d

oes

not s

pec

ifica

lly im

ply

tha

t m

echa

nica

l ero

sion

mec

han

ism

s sh

ould

be

cove

red

in th

e F

AC

pro

gram

it m

ay

lead

to s

om

e ex

pect

atio

ns a

nd th

ese

conc

ern

s ha

ve b

een

note

d in

the

gene

ral c

omm

ents

abo

ve.

Re

wor

d:

Alth

ough

eve

ry p

lant

site

ma

y no

t enc

oun

ter

eros

ion

mec

ha

nism

s, if

ong

oin

g m

onito

ring

acti

viti

es o

f w

all t

hinn

ing

due

to e

rosi

on a

re

occ

urr

ing

, th

ey s

ho

uld

be

incl

ud

ed in

an

A

MP

. is

not

incl

uded

as

par

t of a

ny

oth

er A

MP

, th

en th

ese

mo

nito

ring

act

iviti

es s

hou

ld b

e in

clu

ded

in th

e F

AC

pro

gram

.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

sta

ff fe

els

that

su

ffici

ent c

ave

ats

have

bee

n ad

ded

in th

e F

AC

A

MP

to h

ighl

ight

the

diffe

renc

es b

etw

een

FA

C

and

eros

ion

mec

hani

sms.

N

o ch

ange

wa

s m

ade

to th

e L

R-I

SG

in r

espo

nse

to th

is

com

men

t.

1-16

P

age

4, A

ctio

n B

ulle

t 2:

The

rev

ise

d de

finiti

on

does

not

cla

rify

the

diffe

renc

es

betw

een

FA

C

and

(pur

e) e

rosi

on. T

he r

evis

ed d

efin

ition

an

d co

ntin

ued

ties

to th

e F

AC

pro

gra

m, m

ay

actu

ally

ad

d co

nfus

ion.

See

initi

al c

omm

ent o

n cl

ear

ly d

efin

ing

eros

ion

thro

ugh

eros

ion-

corr

osio

n to

cor

rosi

on

and

defin

ing

wh

ere

FA

C fi

ts.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

A n

umb

er o

f lic

ense

es

use

the

app

roa

ch d

ocum

ente

d in

the

LR-I

SG

w

itho

ut a

ppar

ent

con

fusi

on.

N

o ch

ang

e w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

this

co

mm

ent.

1-

17

Pag

e 4,

Act

ion

Bul

let 1

and

2:

The

se b

ulle

ts

basi

cally

com

e o

ut a

nd s

ay

that

ero

sio

n sh

oul

d be

a s

epar

ate

AM

P, b

ut th

at in

dust

ry a

nd

NR

C

don’

t w

ant

to

mak

e a

sepa

rate

AM

P.

See

Pro

pos

ed

Res

olut

ion

for

“Cha

nges

to th

e

FA

C A

MP

, thi

rd p

ara

gra

ph.”

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

See

sta

ff r

espo

nse

to

com

men

t 1-1

3.

No

chan

ge

was

mad

e to

the

LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-9

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-18

A

-2, S

RP

Tab

le 3

.0-1

: IS

G s

tate

s, "

Whe

re

app

lica

ble,

the

prog

ram

als

o m

ana

ges

wa

ll th

inn

ing…

." T

his

chan

ge

is u

nne

cess

ary.

The

te

xt d

oes

not

def

ine

the

mec

han

ism

exc

ept

thro

ugh

refe

renc

e to

NS

AC

-202

L, s

o st

atin

g th

at

it al

so in

clud

es e

rosi

on

mec

han

ism

s is

un

nec

essa

ry.

NS

AC

-202

L in

clud

es id

ent

ifyin

g lo

ss o

f mat

eria

l bas

ed o

n O

E r

egar

dles

s of

w

het

her

du

e to

ero

sio

n m

ech

anis

ms

or F

AC

. M

ana

gin

g lo

ss o

f mat

eria

l due

to e

rosi

on

mec

hani

sms

is n

ot p

recl

ude

d b

y th

e e

xist

ing

wo

rdin

g.

Del

ete

the

add

ed p

hras

e.

T

he s

taff

disa

gre

es w

ith th

e co

mm

ent a

nd

the

prop

osed

res

olut

ion.

A

ltho

ugh

man

agi

ng

loss

of

mat

eria

l due

to e

rosi

on is

not

pre

clu

ded

by

the

exi

stin

g w

ord

ing,

the

add

ition

of t

he

sent

ence

as

prop

osed

by

the

NR

C w

ill c

lear

ly

delin

eat

e w

hen

the

FA

C A

MP

man

age

s m

echa

nism

s ot

her

than

FA

C.

No

cha

nge

wa

s m

ade

to th

e L

R-I

SG

in r

espo

nse

to th

is

com

men

t.

1-19

A

pp B

/D G

ener

al:

The

FA

C p

rogr

am

impl

emen

tatio

n a

t PW

Rs

addr

esse

s sy

stem

s w

ith c

arb

on s

teel

com

pon

ent

s. T

hese

are

pr

ese

nt in

the

seco

nda

ry s

yste

ms,

and

FA

C is

no

t use

d to

ma

nag

e pr

imar

y (b

orat

ed)

sys

tem

s.

If si

te-s

peci

fic O

E in

dica

tes

the

nee

d to

man

age

add

ition

al a

gin

g ef

fect

s in

the

se s

yste

ms,

a

diffe

rent

(or

ne

w)

prog

ram

wo

uld

be

chos

en to

pr

ovid

e th

at m

ana

gem

ent

.

Rep

lace

rec

omm

end

atio

ns fo

r as

sign

men

t of

FA

C in

tabl

es I

V.C

2, V

.D1,

VII.

C1,

and

VII.

E1

with

a p

lant

-sp

ecifi

c pr

ogr

am f

or m

anag

eme

nt

of w

all

thin

ning

due

to e

rosi

on in

thes

e sy

stem

s.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Reg

ard

ing

the

pro

posa

l to

crea

te a

pla

nt-s

peci

fic A

MP

, see

the

staf

f re

spo

nse

to c

om

men

t 1-1

. N

o ch

ange

wa

s m

ade

to th

e L

R-I

SG

in r

espo

nse

to th

is

com

men

t.

1-20

A

pp B

/D G

ener

al X

I.M1

7, S

cope

: A

s ab

ove,

the

pr

ogra

m im

ple

men

ted

by

NS

AC

-20

2L-R

2 or

R3

gen

eral

ly a

ddr

esse

s sy

stem

s w

ith F

AC

-su

scep

tible

car

bon

stee

l com

pon

ent

s (le

ss th

an

1.25

% c

hrom

ium

) in

sin

gle

phas

e sy

stem

s at

or

abov

e 20

0F, o

r in

tw

o-ph

ase

syst

ems.

A

llow

anc

e is

pro

vid

ed to

incl

ude

ad

ditio

nal n

on-

mod

ele

d co

mp

one

nts

that

may

hav

e un

kno

wn

or

wid

ely

var

ying

ope

ratin

g co

nditi

ons

that

ma

y pr

eve

nt d

eve

lopm

ent o

f rea

sona

bly

acc

urat

e an

aly

tical

mo

del

s. T

he in

clus

ion

of th

is

allo

wa

nce

for

scop

e e

xpa

nsio

n in

NS

AC

-202

L-R

2/R

3 w

as

not

inte

nded

to e

xten

d to

ad

ditio

nal

syst

ems

and

sig

nific

antly

diff

ere

nt m

ater

ials

. If

site

-spe

cific

OE

indi

cate

s th

e n

eed

to m

ana

ge

add

ition

al a

gin

g ef

fect

s in

the

se s

yste

ms,

a

diffe

rent

(or

ne

w)

prog

ram

wo

uld

be

chos

en to

pr

ovid

e th

at m

ana

gem

ent

.

Rev

ise

last

tw

o s

ente

nces

of E

lem

ent

1. S

cope

of

Pro

gram

: to

read

: “T

he p

rogr

am m

ay

also

in

clu

de p

ipin

g an

d co

mpo

nen

ts th

at a

re

susc

eptib

le to

ero

sion

wa

ll-th

inni

ng

mec

hani

sms

such

as

cavi

tatio

n, fl

ashi

ng,

drop

let i

mpi

ngem

ent,

or s

olid

par

ticle

im

pin

gem

ent i

n v

ario

us w

ater

sys

tem

s th

at

ma

y b

e su

sce

pti

ble

to

FA

C. S

ince

ther

e ar

e

no k

now

n m

ate

rials

that

are

imm

une

to w

all

thin

nin

g du

e to

ero

sio

n, p

ipin

g a

nd c

omp

one

nts

of a

ny

mat

eria

l ma

y b

e in

clud

ed in

the

non-

FA

C

port

ion

of th

e p

rogr

am.”

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

pro

pose

d ad

ditio

n of

th

e ph

rase

lim

its th

e F

AC

pro

gra

m to

onl

y sy

stem

s su

sce

ptib

le to

FA

C, w

hic

h is

cou

nter

to

the

appr

oach

bei

ng p

roffe

red

by th

e st

aff.

R

egar

ding

the

com

men

t to

crea

te a

pla

nt-

spec

ific

AM

P, s

ee th

e st

aff r

espo

nse

to

com

men

t 1-1

. N

o ch

ang

e w

as

mad

e to

the

LR-I

SG

in r

espo

nse

to t

his

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

0

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-21

P

age

B-5

& D

-5, T

able

IX.F

: In

the

entr

y un

der

Ero

sio

n, in

the

sent

ence

tha

t sta

tes,

“E

rosi

on is

th

e pr

ogre

ssiv

e lo

ss o

f mat

eria

l du

e to

the

mec

hani

cal i

nter

actio

n be

twe

en a

sur

face

and

a

hig

h-ve

loci

ty fl

uid.

” T

his

stat

emen

t is

inco

rre

ct.

Hig

h-ve

loci

ties

are

not r

equi

red,

esp

ecia

lly fo

r so

lid p

artic

le e

rosi

on

as v

eloc

ities

~ 5

feet

per

se

con

d ha

ve b

een

sho

wn

to c

ause

dam

age

in

raw

wa

ter

syst

ems

(e.g

., S

ervi

ce W

ater

S

yste

ms)

.

Re

wor

d:

Ero

sio

n is

the

prog

ress

ive

loss

of m

ater

ial d

ue

to th

e m

echa

nica

l int

erac

tion

betw

een

a s

urfa

ce

and

a h

igh -

velo

city

flu

id.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but i

nste

ad

of d

elet

ing

“hig

h ve

loci

ty”

repl

aced

it w

ith

“mov

ing.

”

1-22

P

age

B-5

, GA

LL

Tab

le IX

.F:

The

def

initi

on

of

eros

ion

is c

orre

ct a

nd c

lear

. The

initi

al p

ortio

n of

th

e de

finiti

on

of F

AC

is a

lso

corr

ect (

and

imp

lies

alth

oug

h no

t sta

ted)

that

FA

C is

a s

peci

al c

ase

of e

rosi

on-

corr

osio

n th

at o

nly

app

lies

to c

arb

on

stee

l un

der

very

sp

ecifi

c en

viro

nme

ntal

co

nditi

ons)

. The

add

ed it

ems

in b

rack

ets

“[In

pr

evio

us v

ersi

ons

of t

he G

ALL

Rep

ort a

nd

past

N

RC

ge

neri

c co

mm

unic

atio

ns,

this

type

of

corr

osio

n ha

s be

en

inco

rrec

tly c

alle

d er

osio

n-co

rros

ion,

whi

ch is

mis

lead

ing

sin

ce e

rosi

on

impl

ies

a m

ech

anic

al p

roce

ss in

stea

d of

ch

emic

al d

isso

lutio

n.]”

are

not

cor

rect

, as

note

d ab

ove

in c

omm

ents

on

Cla

rific

atio

n a

nd

Def

initi

ons.

1. R

emov

e th

e ad

ded

item

s in

bra

cket

s.

2. A

dd a

ddi

tion

al d

efin

itio

ns o

f er

osio

n-co

rros

ion

(an

inte

ract

ion

betw

een

mec

hani

cal

effe

cts

and

ele

ctro

chem

ical

eff

ects

) an

d co

rros

ion

(a p

ure

ly e

lect

roch

em

ical

pro

cess

) an

d n

ote

that

FA

C is

a s

peci

al c

ase

of e

rosi

on-

corr

osio

n.

3. F

AC

Pro

gra

m. N

ote

that

FA

C p

rogr

ams

prov

ide

a us

eful

an

d pr

oven

met

hod

for

pla

nnin

g, e

xecu

ting,

an

d re

cord

ing

insp

ectio

ns,

and

tren

ding

thos

e re

sults

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd d

elet

ed

the

sent

enc

e in

bra

cket

s as

su

gges

ted

in it

em 1

of

the

prop

ose

d re

solu

tion.

H

ow

ever

, the

sta

ff do

es n

ot b

elie

ve th

at a

ne

w d

efin

ition

, as

prop

osed

in it

em

2 w

hic

h n

ote

s th

at F

AC

is a

sp

ecia

l cas

e of

ero

sio

n-co

rros

ion,

sho

uld

be

add

ed, s

ince

indu

stry

gui

danc

e do

cum

ents

do

not s

upp

ort t

his

poin

t. S

ee c

omm

ent 1

-36

for

mor

e in

form

atio

n.

No

cha

nge

was

ma

de to

the

LR-I

SG

in r

esp

onse

to th

is p

ort

ion

of th

e co

mm

ent.

See

com

men

t 1-1

1 fo

r ch

ange

s m

ade

to th

e L

R-I

SG

reg

ardi

ng

the

3rd p

rop

ose

d re

solu

tion.

1-23

P

age

B-6

, Pro

gram

Des

crip

tion:

S

tatin

g th

at

the

FA

C p

rogr

am “

ma

y b

e us

ed

to m

ana

ge w

all

thin

nin

g du

e to

var

ious

ero

sio

n m

echa

nism

s” is

go

od

but a

lso

pote

ntia

lly a

sks

for

trou

ble

(i.e.

, bl

indl

y us

ing

the

FA

C p

rogr

am

will

hav

e lic

ense

es w

on

der

wh

y h

igh

er C

r ca

rbon

ste

el

erod

es (

e.g.

, as

sho

wn

in s

om

e of

the

OE

).

Cle

arly

sta

te th

at th

e F

AC

pro

gram

pro

vide

s a

usef

ul fo

rmat

and

met

hodo

log

y, h

ow

eve

r, th

e

diffe

renc

es in

the

sour

ce, r

ate

s, s

olut

ions

to

degr

adat

ion,

etc

. mus

t be

prop

erly

und

erst

ood

.

The

sta

ff un

ders

tand

s th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

The

st

aff b

elie

ves

that

it h

as in

clu

ded

suffi

cien

t ca

veat

s re

gar

din

g th

e lim

itatio

ns o

f usi

ng th

e F

AC

pro

gram

for

man

agi

ng

eros

ion

mec

hani

sms.

E

xam

ples

incl

ude

the

add

ition

of

“for

FA

C”

and

“for

ero

sio

n m

ech

anis

ms”

in th

e “d

etec

tion

of a

gin

g ef

fect

s,”

mon

itori

ng a

nd

tren

ding

,” a

nd

“cor

rect

ive

actio

n” p

rogr

am

elem

ents

. N

o ch

ange

wa

s m

ade

to th

e L

R-I

SG

in

res

pons

e to

thi

s co

mm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

1

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-24

P

age

B-6

(D

-6)

item

2:

The

not

ed c

ondi

tions

are

ef

fect

ive

in r

educ

ing

or e

limin

atin

g F

AC

but

hav

e m

inim

al i

mpa

ct o

n er

osio

n m

ech

anis

ms.

Re

wor

d:

Ho

wev

er, i

t is

note

d th

at m

onito

ring

of w

ater

ch

emis

try

to c

ont

rol p

H a

nd d

isso

lve

d o

xyge

n co

nten

t, an

d se

lect

ion

of a

pp

ropr

iate

pip

ing

mat

eria

l, g

eom

etry

, an

d h

ydro

dyn

amic

co

nditi

ons,

are

effe

ctiv

e in

red

ucin

g F

AC

and

b

ut

no

t er

osio

n m

echa

nism

s.

The

sta

ff pa

rtia

lly a

gree

s w

ith t

he c

omm

ent i

n th

at p

H c

ontr

ol a

nd o

xyg

en

cont

ent

will

not

af

fect

ero

sion

; ho

we

ver,

the

oth

er c

ited

cond

ition

s m

ay

be e

ffect

ive.

G

ALL

AM

P

XI.M

17 w

as

chan

ged

as

follo

ws:

“…

are

effe

ctiv

e in

red

ucin

g F

AC

, and

the

sele

ctio

n of

ap

prop

riat

e pi

pin

g m

ater

ial,

geo

met

ry,

and

hyd

rod

ynam

ic c

ond

ition

s ca

n be

effe

ctiv

e in

re

duci

ng b

oth

FA

C a

nd e

rosi

on m

ech

anis

ms.

” 1-

25

Pag

e B

-6 (

D-6

) ite

m 1

: R

ecom

men

d re

visi

ng

“pip

ing

and

co

mpo

nen

ts”

to r

ead

“pip

ing,

pip

ing

com

pone

nts,

and

pip

ing

elem

ents

” si

nce

the

se

are

the

only

co

mpo

nen

ts li

ste

d in

the

mar

ked

up

pag

es o

f the

GA

LL in

clud

ed in

the

ISG

. Thi

s w

oul

d im

prov

e th

e cl

arity

of t

he s

cope

.

Re

wor

d:

Rev

ise

“pip

ing

and

com

pone

nts

” to

rea

d “p

ipin

g, p

ipin

g co

mpo

nent

s, a

nd p

ipin

g el

emen

ts”

to b

e co

nsis

tent

with

oth

er G

ALL

co

mpo

nent

typ

es.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-26

P

age

B-7

(D

-7)

item

5, l

ine

5:

The

sen

tenc

e th

at

beg

ins,

“It

is r

ecog

niz

ed …

” m

isre

pres

ents

the

desi

gn a

nd u

sage

of C

HE

CW

OR

KS

. C

HE

CW

OR

KS

TM

is a

“be

st e

stim

ate”

pro

gra

m

and

as s

uch

its p

redi

ctio

ns a

re a

djus

ted

by

insp

ectio

n da

ta to

pas

s th

roug

h th

e ce

nter

of

the

insp

ectio

n da

ta.

Re

wor

d:

It is

rec

ogni

zed

that

CH

EC

WO

RK

ST

M is

not

al

wa

ys c

onse

rvat

ive

in p

redi

ctin

g co

mp

onen

t th

ickn

ess;

ther

efor

e, w

hen

mea

sure

men

ts s

how

th

e pr

edic

tions

to b

e no

n-co

nser

vativ

e, th

e m

ode

l mus

t be

re-

calib

rate

d u

sing

the

late

st

field

dat

a.

Insp

ectio

n da

ta fr

om e

very

ref

uelin

g o

utag

e is

in

put

into

CH

EC

WO

RK

ST

M to

ens

ure

that

the

pred

ictiv

e m

odel

is p

rope

rly

re-c

alib

rate

d.

The

sta

ff no

tes

that

the

com

men

t per

tain

s to

ex

istin

g w

ord

ing

in th

e A

MP

that

is n

ot b

ein

g

chan

ged

by

this

LR

-IS

G.

How

eve

r, th

e st

aff

agre

es th

at th

e u

se o

f ins

pec

tion

data

can

be

m

ore

cle

arly

des

crib

ed in

the

AM

P.

The

se

nten

ce in

the

pro

pose

d re

solu

tion

was

de

lete

d a

nd r

epl

aced

with

: “D

ata

from

eac

h co

mpo

nent

insp

ectio

n is

use

d to

cal

ibra

te th

e w

ear

rat

es c

alc

ulat

ed

in th

e pr

edic

tive

mod

el

with

thos

e o

bser

ved

in fi

eld

dat

a.”

1-27

P

age

B-7

(D

-7)

elem

ent

4:

It is

unc

erta

in a

t w

hat

leve

l of

wal

l thi

nnin

g a

n ex

tent

of r

evie

w is

re

quire

d.

E

lem

ent

4 s

tate

s “I

f w

all t

hin

nin

g d

ue to

an

eros

ion

mec

ha

nism

(e.

g., c

avita

tion,

flas

hing

, dr

ople

t im

ping

emen

t, or

sol

id p

artic

le

impi

nge

men

t) is

iden

tifie

d, th

en

the

appl

ican

t pe

rfor

ms

an e

xten

t-of

-con

diti

on

revi

ew

to id

ent

ify

othe

r co

mp

one

nts

that

are

com

para

bly

susc

eptib

le to

the

sam

e m

ech

anis

m”

Incl

ude

crite

ria t

o de

fine

wh

en

an e

xten

t of

revi

ew

is r

equ

ired

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

A

licen

see

’s c

orre

ctiv

e ac

tion

prog

ram

co

ntro

ls

wh

en

an e

xte

nt o

f con

ditio

n is

req

uire

d, a

nd

guid

ance

in th

at

rega

rd is

not

app

ropr

iate

for

an

AM

P.

No

chan

ge w

as m

ade

to th

e LR

-IS

G in

re

spon

se to

this

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

2

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-28

P

age

B-7

(D

-7)

elem

ent

5, 2

nd p

ara

grap

h:

Ele

me

nt 5

doe

s no

t ide

ntify

a p

refe

rre

d m

etho

dol

og

y to

be

use

d to

“p

redi

ct th

e re

mai

nin

g se

rvic

e lif

e of

the

com

pon

ent”

Iden

tify

the

me

thod

olo

gy

pref

erre

d b

y th

e N

RC

to

“pr

edic

t the

rem

aini

ng

serv

ice

life

to th

e co

mpo

nent

.”

The

sta

ff un

ders

tand

s th

e co

mm

ent b

ut

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

NS

AC

-20

2L

prov

ides

sev

era

l met

hods

to d

eter

min

e w

ear

bet

wee

n tw

o ou

tage

s a

nd

rem

aini

ng

serv

ice

life.

C

ompa

rabl

e to

deg

rada

tion

due

to

FA

C, t

he N

RC

allo

ws

licen

see

s to

det

erm

ine

the

met

hod

tha

t is

use

d.

No

chan

ge w

as

ma

de

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

1-29

P

age

B-7

(D

-7)

elem

ent

5, 2

nd p

ara

grap

h:

Pre

dict

ive

tool

s ar

e ab

sent

. Id

entif

y th

e la

ck o

f pre

dict

ive

tool

s, m

eani

ng

that

the

lice

nse

e m

ust h

ave

som

e un

der

stan

din

g of

wh

ere

susc

ept

ibili

ties

coul

d ex

ist i

n th

e sy

stem

and

mus

t act

acc

ordi

ngly

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

The

“d

etec

tion

of a

gin

g ef

fect

s” p

rogr

am e

lem

ent

pr

ovid

es s

ever

al r

efer

enc

es th

at p

rovi

de

insi

ght

s in

to u

nde

rsta

ndi

ng

susc

eptib

ilitie

s in

th

e sy

stem

. N

o ch

ange

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

1-30

P

age

B-8

(D

-8)

elem

ent

7, 2

nd s

ente

nce:

The

pa

ragr

aph

is a

ccur

ate,

but

it w

oul

d be

cle

arer

to

mod

ify t

he s

econ

d se

nten

ce.

Re

wor

d:

For

FA

C, l

ong-

term

cor

rect

ive

act

ions

cou

ld

incl

ude

adj

ustin

g op

erat

ing

par

amet

ers

or

sele

ctin

g re

sist

ant m

ater

ials

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-31

P

age

B-8

(D

-8)

elem

ent

7, C

orre

ctiv

e A

ctio

ns:

N

o gu

ida

nce

is g

iven

for

eva

luat

ing

the

effe

ctiv

enes

s o

f co

rrec

tive

actio

ns fo

r er

osio

n

mec

hani

sms

or “

as p

art a

n A

MP

,” p

resu

ma

bly,

a

diffe

rent

AM

P.

As

note

d a

bove

, cle

arly

sta

te (

and

reite

rate

) th

at th

e F

AC

pro

gram

(m

erel

y) p

rovi

des

a

usef

ul fo

rmat

and

met

hodo

log

y, h

ow

eve

r, th

e

diffe

renc

es in

the

sour

ces,

rat

es,

solu

tions

to

degr

adat

ion,

etc

. mus

t be

prop

erly

und

erst

ood

. T

hat i

s, in

the

abse

nce

of a

sep

arat

e A

MP

to

cove

r er

osio

n m

echa

nism

s, th

e A

MP

form

at,

etc.

can

be

use

d; h

ow

ever

, the

diff

eren

ces

betw

een

FA

C a

nd e

rosi

on

mus

t be

clea

rly

und

erst

ood

in te

rms

of d

river

s an

d so

lutio

ns.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd th

e pr

opos

ed r

esol

utio

n.

The

ass

ocia

ted

port

ion

of

the

“cor

rect

ive

actio

n” p

rogr

am

ele

me

nt w

as

revi

sed

to c

larif

y th

e co

rrec

tive

act

ions

for

eros

ion.

A

lso,

the

“mon

itori

ng a

nd tr

end

ing”

pr

ogra

m e

lem

ent

cur

rent

ly d

iscu

sses

con

tinu

ing

peri

odic

wa

ll th

ickn

ess

me

asu

rem

ents

as

part

of

con

firm

ing

the

effe

ctiv

ene

ss o

f cor

rect

ive

actio

ns fo

r re

pla

cem

ent

com

pon

ent

s.

With

re

gard

to d

iffer

ence

s b

etw

een

FA

C a

nd n

on-

FA

C “

driv

ers

and

solu

tions

,” s

ever

al c

hang

es

have

bee

n m

ade

to c

lear

ly d

istin

guis

h b

etw

een

thes

e m

ech

anis

ms

in r

espo

nse

to t

his

com

men

t an

d co

mm

ents

1-2

4, 1

-30,

1-4

3, a

nd 2

-6.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

3

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-32

P

age

B-8

(D

-8)

item

10:

F

ive

exam

ple

s of

op

erat

ing

exp

erie

nce

are

cite

d as

“…

oth

er th

an

FA

C o

r a

com

bin

atio

n of

mec

han

ism

s.”

Look

ing

at th

e fiv

e: 1

) P

oint

Bea

ch –

FW

H s

hell

was

due

to

FA

C a

lone

acc

ordi

ng to

EP

RI r

evie

w.

2) C

alla

wa

y -

ma

y h

ave

bee

n an

exa

mpl

e bu

t it

is n

ot c

lear

fro

m th

e la

b an

alys

is. 3

) P

each

B

otto

m –

cav

itatio

n er

osio

n, a

bras

ive

eros

ion

(i.e.

, sol

id p

artic

le e

rosi

on),

and

wat

er je

t cut

ting

4) D

resd

en –

liqu

id d

rop

let i

mpi

nge

me

nt,

5) Q

uad

Citi

es –

“er

osio

n.”

Whi

le w

all

thin

nin

g ca

use

d b

y a

com

bin

atio

n of

mec

hani

sms

ma

y oc

cur,

it is

not

com

mon

.

Re

wor

d:

Obs

erve

d w

all

thin

nin

g m

ay

be

due

to

mec

hani

sms

othe

r th

an F

AC

or,

less

co

mm

only

, due

to a

com

bina

tion

of

mec

hani

sms.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-33

P

age

D-2

, GA

LL IV

-C2:

It

is h

ard

to im

agin

e th

at w

all

thin

ning

is a

n is

sue

in th

e R

CS

sys

tem

of

a P

WR

. Par

ticul

ates

are

mo

nito

red,

the

only

pl

ace

two

-ph

ase

cool

ant e

xist

s is

ne

xt to

the

fuel

ro

ds a

nd

in th

e p

ress

uriz

er, a

nd th

e o

nly

pla

ce

cavi

tatio

n or

fla

shin

g w

ould

occ

ur is

in th

e R

CP

or

do

wn

stre

am o

f con

nect

ing

valv

es o

r or

ifice

s,

wh

ich

ma

y or

ma

y n

ot b

e th

e R

CS

sys

tem

. B

ased

on

revi

ew

of E

PR

I 10

112

31

“Rec

omm

end

atio

ns fo

r C

ontr

ollin

g C

avita

tion,

F

lash

ing,

Liq

uid

Dro

ple

t Im

pin

gem

ent

, and

Sol

id

Par

ticle

Ero

sio

n in

Nuc

lear

Po

wer

Pla

nt P

ipin

g S

yste

ms,

” w

e do

not

und

erst

and

the

NR

C

conc

ern

for

ero

sion

in th

e R

CS

of P

WR

s. B

WR

s ar

e m

entio

ned

in E

PR

I 101

1231

, but

not

PW

Rs.

Mak

e lin

e ite

m s

peci

fic to

BW

Rs.

In G

ALL

, R

ev 2

, FA

C is

onl

y a

pplie

d to

BW

Rs.

I di

d no

t se

e an

y e

xam

ple

s of

wal

l thi

nni

ng

in th

e R

CS

sy

stem

in t

he I

SG

, ye

t th

e re

visi

ons

seem

to

focu

s on

the

RC

S s

yste

m. I

kno

w P

alo

Ver

de

expe

rien

ced

cavi

tatio

n is

sues

rel

ate

d to

the

RC

Ps

duri

ng s

tart

-up,

but

thes

e w

ere

res

olve

d.

Add

OE

rel

ate

d to

ero

sio

n to

the

AM

P a

nd

prov

ide

the

caus

e.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd d

elet

ed

the

new

item

in IV

-C2

for

wa

ll th

inn

ing

due

to

eros

ion

in th

e re

acto

r co

ola

nt s

yste

m o

f PW

Rs.

R

egar

ding

the

prop

osed

res

olut

ion

to a

dd

eros

ion-

rela

ted

OE

to

the

AM

P,

the

staf

f be

lieve

s su

ffici

ent o

pera

ting

exp

erie

nce

rela

ting

to e

rosi

on

is in

clud

ed in

the

curr

ent c

hang

es to

th

e A

MP

.

1-34

P

age

D-3

, VII

C1:

Thi

s lin

e ite

m is

not

nee

ded

as

XI.

M20

ma

nag

es e

rosi

on in

ser

vice

wat

er

syst

ems

in a

ccor

danc

e w

ith [

Gen

eric

Let

ter

(GL)

] 89-

13 c

om

mitm

ents

. Thi

s ne

w it

em

conf

uses

this

issu

e. T

o do

this

wo

uld

be c

on

trar

y to

the

[GL]

89-

13 c

omm

itme

nt

whi

ch is

par

t of

[X

I.]M

20.

Del

ete

this

lin

e it

em a

s it

is n

ot n

eede

d. R

evis

e [X

I.]M

20 to

incl

ude

wa

ll th

inni

ng d

ue to

ero

sion

as

an

agin

g ef

fect

. Do

not c

redi

t a p

rogr

am th

at

is n

ot p

art o

f the

[GL]

89-

13 c

omm

itmen

ts.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Alth

oug

h G

L 89

-13

incl

ude

d ro

utin

e in

spec

tions

for

eros

ion,

it o

nly

cons

ider

ed

ero

sion

due

to s

uspe

nde

d pa

rtic

ula

tes.

If

eros

ion

due

to c

ause

s ot

her

th

an s

olid

par

ticle

ero

sion

has

bee

n id

ent

ified

, th

en th

is d

egra

datio

n ty

pic

ally

wo

uld

not b

e in

clud

ed in

GL

89-1

3 co

mm

itmen

ts.

Ho

wev

er,

wh

ile X

I.M20

rel

ies

on im

ple

men

tatio

n of

G

L 89

-13,

this

doe

s n

ot p

recl

ude

a lic

ens

ee

from

per

form

ing

agin

g m

ana

gem

ent a

ctiv

itie

s th

roug

h a

diffe

rent

AM

P b

y us

ing

a ge

neri

c no

te E

. N

o ch

ang

e w

as m

ad

e to

the

LR-I

SG

in

resp

onse

to

this

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

4

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-35

P

age

D-5

, Tab

le IX

.F::S

ays

, “D

iffer

ent f

orm

s of

er

osio

n m

ay

incl

ude

cavi

tatio

n, fl

ashi

ng,

dro

plet

im

pin

gem

ent,

or s

olid

par

ticle

impi

nge

me

nt.”

F

orm

s of

ero

sion

DO

incl

ude

the

liste

d ite

ms.

Cha

nge

to r

ea

d, “

Diff

eren

t for

ms

of e

rosi

on

incl

ude

cav

itatio

n, fl

ashi

ng, d

ropl

et

impi

nge

men

t, an

d so

lid p

artic

le im

ping

emen

t.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-36

P

age

D-5

, Tab

le IX

.F:

Def

initi

on o

f FA

C

cont

ains

ref

ere

nce

to p

revi

ous

defin

ition

s. T

his

is u

nnec

essa

ry. R

ecom

men

d ju

st s

ticki

ng w

ith

the

new

def

initi

on w

ithou

t ap

olog

izin

g fo

r pr

evio

us v

ersi

on.

Del

ete

“[In

pre

viou

s ve

rsio

ns o

f the

GA

LL

Rep

ort a

nd p

ast

NR

C g

ener

ic c

omm

unic

atio

ns,

this

typ

e of

cor

rosi

on h

as b

een

inco

rrec

tly

calle

d er

osio

n-co

rros

ion,

whi

ch is

mis

lead

ing

si

nce

eros

ion

impl

ies

a m

ech

anic

al p

roce

ss

inst

ead

of c

hem

ical

dis

solu

tion]

.”

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G a

s pr

opos

ed.

1-37

P

age

D-5

, Tab

le IX

.F, F

AC

: T

his

sect

ion

was

m

ore

corr

ect b

efor

e th

e m

odifi

catio

ns.

Tha

t is

, it

did

not

def

ine

FA

C a

s on

ly b

ein

g op

erat

ive

on

pipi

ng. I

t did

co

rrec

tly s

tate

that

FA

C is

a fo

rm o

f er

osio

n-co

rros

ion,

and

that

the

mec

hani

sm is

w

ell

und

erst

ood

and

we

ll de

scrib

ed.

1. R

etur

n to

the

orig

ina

l wor

din

g.

2. A

dd d

iscu

ssio

n as

pro

pose

d in

the

com

men

t fo

r D

iscu

ssio

n –

Gen

era

l.

The

sta

ff ag

ree

s th

at t

he d

efin

ition

sho

uld

not

be r

estr

icte

d o

nly

to p

ipin

g, a

nd r

epla

ced

“pip

ing”

with

“co

mpo

nent

s” in

the

def

initi

on.

H

ow

ever

, NS

AC

-20

2L s

tate

s:

Flo

w-

acce

lera

ted

corr

osio

n is

so

me

times

, but

in

corr

ectly

, ca

lled

eros

ion-

corr

osio

n.

Ero

sion

, it

shou

ld b

e no

ted,

is n

ot p

art o

f the

deg

rada

tion

mec

hani

sm.

Bas

ed o

n th

e ab

ove,

the

staf

f di

sagr

ees

that

the

prev

ious

def

initi

on w

as m

ore

corr

ect b

efor

e th

e m

odifi

catio

n, a

nd th

us

reta

ined

the

revi

sion

to th

e L

R-I

SG

. 1-

38

Pag

e D

-6, P

rogr

am D

escr

iptio

n: T

he q

ualif

ier

is

unn

eces

sary

. S

hou

ld li

mit

the

disc

ussi

on to

wh

at

the

prog

ram

do

es; n

ot n

eces

saril

y w

hen

yo

u m

ay

choo

se to

use

it.

Del

ete

“if th

e er

osio

n m

echa

nism

s ar

e no

t be

ing

man

age

d b

y an

othe

r pr

ogra

m.”

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G.

Als

o se

e re

spon

ses

to

com

men

ts 1

-39

and

2-7.

1-39

P

age

D-6

, Pro

gram

Des

crip

tion:

A

dde

d pa

ragr

aph

indi

cate

s th

at “

an a

ppro

pria

te

insp

ectio

n pr

ogra

m …

sho

uld

be d

evel

ope

d.”

The

FA

C “

prog

ram

” m

ay

be

that

pro

gram

and

it

is a

lread

y “d

evel

ope

d” a

s de

scrib

ed

in X

I.M17

.

Rec

omm

end

mod

ifyin

g th

e fir

st s

ente

nce

to

indi

cate

that

wal

l thi

nnin

g m

ay

be

caus

ed

by

the

liste

d m

ech

anis

ms

and

ref

eren

ce th

e E

PR

I 10

1123

1, a

nd t

hat

this

[X

I.]M

17 p

rogr

am m

ay

be u

sed

to m

ana

ge

such

wa

ll th

inni

ng. P

erh

aps

com

bine

the

first

sen

tenc

e of

the

Pro

gram

D

escr

iptio

n in

to t

his

para

grap

h.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd

chan

ged

the

LR

-IS

G.

Als

o se

e re

spon

ses

to

com

men

ts 1

-38

and

2-7.

1-40

P

age

D-6

, Ele

men

t 1:

In a

dded

text

, don

’t n

eed

to s

peci

fy a

“no

n-F

AC

por

tion

of th

e pr

ogra

m.”

Del

ete

from

last

sen

tenc

e, “

the

non-

FA

C

port

ion

of.”

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Ho

we

ver,

for

clar

ity th

e

term

“no

n-F

AC

” w

as c

han

ged

to “

eros

ion.

” T

he

phra

se “

...er

osio

n po

rtio

n of

...”

is b

eing

ret

aine

d to

rei

nfor

ce th

e di

stin

ctio

n be

twe

en

com

pone

nts

in s

cop

e fo

r F

AC

and

com

pon

ents

in s

cop

e fo

r er

osio

n.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

5

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-41

P

age

D-6

, Ele

men

t 3:

In it

s ba

sic

form

, w

all

thin

nin

g is

stil

l los

s of

mat

eria

l.

Rec

omm

end

leav

ing

loss

of m

ater

ial a

s th

e re

leva

nt a

ging

effe

ct.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent b

ut

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

GA

LL

Rep

ort T

able

IX.E

cur

rent

ly d

efin

es th

e ag

ing

effe

ct “

wa

ll th

inni

ng”

as

a sp

ecifi

c ty

pe

of lo

ss o

f m

ater

ial a

ttrib

ute

d to

FA

C, a

nd d

efin

es F

AC

an

d er

osio

n as

agi

ng

mec

han

ism

s. T

he A

MP

ha

s be

en c

orre

cted

bec

aus

e it

prev

ious

ly

ascr

ibed

an

agin

g ef

fect

due

to

anot

her

ag

ing

effe

ct in

stea

d o

f ag

ing

mec

hani

sms.

N

o ch

ange

wa

s m

ade

to th

e L

R-I

SG

in r

espo

nse

to

this

com

men

t.

1-42

P

age

D-6

, Ele

men

t 4:

T

he a

dded

dis

cuss

ion

on p

erfo

rmin

g e

xten

t of

cond

ition

rev

iew

is u

nnec

essa

ry a

nd r

edu

ndan

t. A

s st

ated

on

pag

e 4

ext

ent o

f con

ditio

n is

pa

rt o

f co

rrec

tive

actio

n el

emen

t an

d sh

ould

rem

ain

on

ly th

ere.

The

re is

no

need

to

incl

ude

this

re

vie

w in

ele

men

t 4 a

s de

tect

ion

of a

ging

eff

ects

is

use

d to

pro

vide

info

rmat

ion

on h

ow

the

agin

g ef

fect

s w

ill b

e de

tect

ed n

ot c

orre

ctiv

e ac

tion

s. It

st

ates

in th

is e

lem

ent t

hat t

he p

rogr

am in

clud

es

iden

tific

atio

n of

sus

cept

ible

loca

tions

wh

ich

is

the

sam

e as

an

ext

ent o

f con

ditio

n re

vie

w.

Del

ete

the

ext

ent

of c

ondi

tion

revi

ew

di

scus

sion

.

The

sta

ff ag

ree

s th

at t

he e

xte

nt-o

f-co

nditi

on

revi

ew

is p

art o

f th

e co

rrec

tive

act

ion

elem

ent

. H

ow

ever

, sin

ce th

e pr

edic

tion

of s

usce

ptib

le

loca

tions

for

eros

ion

mec

hani

sms

is n

ot a

s de

fined

as

for

FA

C th

roug

h C

HE

CW

OR

KS

, the

ex

tent

-of-

con

ditio

n re

vie

w is

the

star

ting

poi

nt

for

this

asp

ect a

nd n

eeds

to b

e di

scus

sed

in t

he

“det

ectio

n of

agi

ng

effe

cts”

pro

gram

ele

me

nt.

AM

P X

I.M17

“d

etec

tion

of a

gin

g ef

fect

s”

prog

ram

ele

me

nt w

as

revi

sed

to c

larif

y th

at th

e ex

tent

-of-

con

ditio

n re

vie

ws

are

from

cor

rect

ive

actio

ns in

res

pon

se to

ope

ratin

g e

xper

ienc

e.

1-43

P

age

D-7

, Ele

men

t 5:

The

firs

t par

agra

ph is

m

odifi

ed to

exp

and

and

upd

ate

disc

ussi

ons

of

CH

EC

WO

RK

S, e

t al.

but d

oes

not c

lear

ly s

tate

th

at th

ose

cod

es a

nd a

ssoc

iate

d ch

emis

try

and

m

ater

ials

sel

ectio

n so

lutio

ns a

re fo

r F

AC

and

F

AC

onl

y.

The

firs

t par

agra

ph m

ust c

lear

ly s

tate

wh

enev

er

poss

ible

that

CH

EC

WO

RK

S, e

t al.

are

for

FA

C

and

FA

C o

nly

. T

he (

adde

d) s

eco

nd p

ara

grap

h on

ero

sion

sho

uld

not

e th

at th

e m

etho

dol

ogy

for

insp

ectio

n pl

an

nin

g, e

xecu

tion

of i

nspe

ctio

ns,

data

rec

ordi

ng,

data

tren

ding

, et

c. p

rovi

ded

in

FA

C p

rogr

ams

can

be u

sefu

l for

ero

sion

ev

alua

tions

, bu

t tha

t pre

dict

ive

met

hods

for

FA

C o

r F

AC

sol

utio

ns w

ill n

ot b

e ap

plic

able

to

eros

ion.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent a

nd n

ote

s th

at, a

lthou

gh N

SA

C-2

02L

an

d C

HE

CW

OR

KS

tr

aini

ng p

rovi

des

suf

ficie

nt g

uid

anc

e re

gar

din

g lim

itatio

ns fo

r e

rosi

on

mec

hani

sms,

the

staf

f ad

ded

add

ition

al c

larif

icat

ions

in th

e A

MP

by

re-

wo

rdin

g th

e fir

st s

ente

nce

of e

lem

ent 5

. A

lso,

cl

arifi

catio

n b

etw

ee

n F

AC

and

ero

sio

n w

ere

mad

e in

res

pons

e to

com

me

nts

1-24

, 1-3

0, a

nd

2-6.

1-44

P

age

D-8

, Ele

men

t 6:

Acc

epta

nce

crite

ria

shou

ld n

ot r

efer

to

inpu

tting

dat

a in

to a

pr

edic

tive

cod

e o

r sa

y yo

u ne

ed to

incl

ude

corr

ectiv

e ac

tions

. The

pre

dict

ion

ma

y b

e a

sim

ple

stra

ight

line

pro

ject

ion

from

tw

o m

easu

red

poi

nts

. Cor

rect

ive

act

ions

are

cov

ere

d b

y el

emen

t #7.

Rev

ise

the

first

par

t of f

irst s

ente

nce

to r

ead,

“I

nspe

ctio

n re

sults

are

use

d to

cal

cula

te…

”.

Cha

nge

last

se

nten

ce to

sa

y, “

Cal

cula

tions

in

dica

te th

at a

n a

rea

will

not

re

ach

the

min

imu

m

allo

we

d w

all

thic

knes

s be

fore

the

next

sc

hed

ule

d in

spec

tion.

”

The

sta

ff ag

ree

s th

at th

e w

ordi

ng in

the

acce

pta

nce

crite

ria p

rogr

am e

lem

ent s

houl

d be

re

vise

d. T

he s

taff

repl

aced

the

exi

stin

g pr

ogra

m e

lem

ent

with

wo

rds

from

NS

AC

-202

L S

ectio

n 4.

7 an

d 4.

9.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

6

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

1-45

P

age

D-8

, Ele

men

t 7:

The

sta

tem

ent,

"The

se

lect

ion

of r

epla

cem

ent m

ate

rials

req

uire

s co

nsid

erat

ion

of

a nu

mbe

r fa

ctor

s, b

ecau

se a

m

ater

ial t

hat

is c

ompl

etel

y er

osi

on r

esis

tant

is

not a

vaila

ble.

" ca

n be

sh

orte

ned

. It c

ould

just

sa

y "A

mat

eria

l tha

t is

com

plet

ely

eros

ion

resi

stan

t is

not

avai

lab

le."

Wh

enev

er

repl

acem

ent

mat

eria

ls a

re e

valu

ated

a n

umbe

r of

fact

ors

are

norm

ally

co

nsid

ered

.

Rev

ise

the

wor

din

g to

sho

rten

the

stat

emen

t.

T

he s

taff

agre

es

with

the

com

men

t and

ch

ange

d X

I.M1

7 “c

orre

ctiv

e a

ctio

n” p

rogr

am

elem

ent a

s fo

llow

s:

“Per

iod

ic m

onito

ring

ac

tiviti

es s

hou

ld c

ontin

ue fo

r an

y co

mp

onen

ts

repl

aced

with

res

ista

nt m

ater

ial,

sinc

e a

mat

eria

l th

at is

com

plet

ely

ero

sion

res

ista

nt is

no

t ava

ilabl

e.”

2-1

In

trod

uctio

n:

Ero

sio

n m

echa

nism

s ar

e no

t "A

ging

Effe

cts.

"

The

ero

sion

mec

hani

sms

disc

usse

d d

o re

sult

in

wa

ll th

inn

ing

but

are

not

ag

ing

effe

cts

sim

ilar

to

gen

eral

cor

rosi

on, F

AC

, M

IC, e

tc. R

emov

e th

e re

fere

nce

to a

gin

g m

echa

nis

ms

and

only

ref

er

to th

e w

all

thin

nin

g or

wea

r at

trib

utes

of t

he

eros

ion

mec

ha

nism

s.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Wal

l thi

nnin

g ca

used

by

eros

ion

mec

ha

nism

s is

a ti

me

-dep

end

ent l

oss

of m

ater

ial s

imila

r to

FA

C.

EP

RI 1

010

639

note

s th

at c

avita

tion

eros

ion

is n

ot c

onsi

der

ed

an a

ppl

icab

le a

gin

g m

echa

nism

bec

ause

“it

is

assu

me

d th

at a

ll co

nditi

ons

that

cou

ld r

esu

lt in

ca

vita

tion

eros

ion

wer

e co

rrec

ted

duri

ng th

e cu

rren

t ter

m o

f ope

ratio

n.”

EP

RI 1

010

639

also

no

tes

that

cav

itatio

n er

osio

n m

ay

nee

d to

be

cons

ider

ed

duri

ng p

lant

-sp

ecifi

c ag

ing

man

age

me

nt r

evie

w in

infr

eq

uent

ly o

pera

ted

syst

ems

wh

ere

loss

of

func

tion

may

occ

ur in

th

e pe

riod

of e

xte

nde

d op

erat

ion.

T

his

wou

ld

sim

ilarl

y ap

ply

wh

ere

cavi

tatio

n er

osio

n h

as

bee

n id

entif

ied

duri

ng th

e cu

rren

t ter

m o

f op

erat

ion,

but

has

not

bee

n co

rrec

ted.

A

s st

ated

in th

e L

R-I

SG

, the

Sta

tem

ent o

f C

onsi

dera

tions

for

Par

t 54

note

s th

at c

orre

ctiv

e ac

tions

sh

ould

foc

us o

n pr

eve

ntio

n, e

limin

atio

n,

or m

ana

gem

en

t of

the

effe

cts

caus

ed

by

thes

e m

echa

nism

s.

Sin

ce s

ome

licen

sees

hav

e ch

ose

n to

man

age

som

e er

osio

n m

echa

nis

ms

rath

er th

an c

orre

ct th

e co

nditi

ons,

the

resu

lting

lo

ss o

f mat

eria

l is

an a

ging

eff

ect t

hat r

equi

res

man

age

me

nt.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

7

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-2

G

ener

al:

The

incl

usio

n or

add

ition

of

mec

hani

cal e

rosi

on m

echa

nis

ms

into

the

FA

C

AM

P (

XI.M

17)

wo

uld

be c

onfu

sing

and

pos

sibl

y de

trim

ent

al to

the

curr

ent

ly w

ell

boun

ded

and

st

ruct

ured

indu

stry

FA

C p

rogr

ams.

The

su

scep

tibili

ty b

ases

of i

ndus

try

FA

C p

rogr

ams

are

cle

arly

def

ined

and

the

incl

usio

n of

ero

sion

m

echa

nism

s w

ould

cro

ss m

any

of th

ose

bou

ndar

ies.

Cre

ate

a se

para

te A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms.

T

he s

taff

disa

gre

es w

ith th

is c

omm

ent a

nd

the

prop

osed

res

olut

ion.

R

egar

din

g th

e pr

opo

sal t

o cr

eate

a s

epar

ate

AM

P, s

ee th

e st

aff r

espo

nse

to

com

men

t 1-1

. N

o ch

ange

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

2-3

D

iscu

ssio

n:

Ero

sio

n, s

imila

r to

FA

C, i

s a

wa

ll-th

inn

ing

phe

nom

eno

n re

late

d to

flui

d d

ynam

ics

FA

C is

a tr

ue a

gin

g m

echa

nism

due

to

corr

osio

n; in

this

cas

e, th

e de

gra

datio

n of

the

norm

ally

pro

tect

ive

oxi

de

laye

r of

a c

arbo

n st

eel

com

pone

nt.

Flu

id d

ynam

ics

onl

y ac

cele

rate

s th

e pr

oces

s.

Rem

ove

“sim

ilar

to F

AC

” fr

om th

e st

atem

ent.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent b

ut

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n. E

rosi

on

and

FA

C c

ause

a s

imila

r ag

ing

effe

ct, l

oss

of

mat

eria

l, b

ut th

roug

h di

ffere

nt m

echa

nism

s.

The

pur

pose

of

this

LR

-IS

G is

to e

nsur

e th

at

wa

ll th

inn

ing

caus

ed

by

eros

ion

is b

ein

g ef

fect

ivel

y m

anag

ed.

N

o ch

ange

was

ma

de to

th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

2-4

Dis

cuss

ion:

E

rosi

on m

echa

nism

suc

h as

ca

vita

tion,

flas

hin

g an

d dr

ople

t im

pin

gem

en

t ar

e no

t agi

ng m

echa

nis

ms

but t

ypic

ally

ass

ocia

ted

with

impr

ope

r op

erat

ion

and

cons

ider

ed

to b

e a

desi

gn d

efic

ien

cy.

Rem

ove

the

refe

renc

e to

agi

ng

mec

hani

sms

as

rela

ted

to c

avita

tion,

flas

hin

g an

d dr

ople

t im

pin

gem

ent o

r cl

arify

/rei

tera

te th

at th

ese

are

not a

ging

mec

han

ism

s.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Cav

itatio

n, fl

ashi

ng,

drop

let i

mpi

ngem

ent c

ause

an

agin

g ef

fect

, los

s of

mat

eria

l, si

mila

r to

FA

C, b

ut th

roug

h d

iffer

ent

m

echa

nism

s.

Whi

le s

ome

eros

ion

mec

hani

sms

ma

y b

e co

nsid

ered

des

ign

defic

ienc

ies,

if

licen

sees

hav

e c

hose

n to

ma

nag

e th

e re

sulti

ng

loss

of m

ater

ial t

hrou

gh o

ngoi

ng m

onito

ring

activ

ities

inst

ead

of th

roug

h de

sign

or

oper

atio

nal

ch

ang

es, t

hen

thes

e m

onito

ring

ac

tiviti

es n

eed

to b

e pa

rt o

f an

AM

P.

No

chan

ge w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

th

is c

omm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

8

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-5

D

iscu

ssio

n:

Dur

ing

rece

nt li

cens

e re

new

al

revi

ew

s, th

e st

aff f

ound

inst

anc

es w

her

e ap

plic

ant

s co

ntin

ued

to e

xper

ienc

e lo

ss o

f m

ater

ial d

ue to

cav

itatio

n er

osio

n b

eca

use

the

desi

gn d

efic

ien

cy w

as n

ot c

orre

cted

. T

he

ind

ustr

y g

uid

elin

es a

lso

stat

e th

at th

is d

efic

ienc

y w

ill b

e co

rrec

ted

duri

ng th

e cu

rren

t ter

m o

f op

erat

ion.

In

that

reg

ard,

the

Sta

tem

ent o

f C

onsi

dera

tions

(60

FR

224

61,

224

69,

Ma

y 8,

19

95)

for

10 C

FR

54

note

s th

at c

orre

ctiv

e ac

tions

that

sh

ould

be

take

n to

add

ress

fu

nctio

nal

deg

rada

tion

logi

cally

incl

ude

ca

use

dete

rmin

atio

ns o

ther

than

agi

ng (

e.g.

, im

pro

per

oper

atio

n), b

ut th

at c

orre

ctiv

e ac

tions

sh

ould

fo

cus

on p

reve

ntio

n, e

limin

atio

n or

man

age

men

t of

the

effe

cts

caus

ed

by

thes

e m

echa

nis

ms.

Rev

ise

or r

ecal

l LR

-IS

G-2

012-

01.

Ero

sion

m

echa

nism

s ar

e no

t agi

ng e

ffec

ts a

nd a

few

in

stan

ces

of im

prop

er m

ana

gem

ent o

f the

se

degr

adat

ion

mec

hani

sms,

is n

ot s

uffic

ient

ca

use

for

new

indu

stry

gu

idan

ce.

Indu

stry

gu

idan

ce h

as a

lrea

dy

bee

n es

tabl

ishe

d fo

r th

ese

degr

ada

tion

effe

cts

in th

e fo

rm o

f pr

eve

ntio

n an

d e

limin

atio

n.

Indu

stry

gui

delin

es

also

sta

te th

at th

ese

type

s of

def

icie

ncie

s sh

ould

be

corr

ecte

d w

hen

fou

nd, t

here

fore

in

the

curr

ent t

erm

of o

pera

tion,

and

ne

ed n

ot b

e ca

rrie

d in

to th

e e

xte

nde

d pe

riod

of o

per

atio

n.

H

ow

ever

, if t

hese

add

itio

nal w

ear

mec

han

ism

s ar

e to

be

ma

nage

d pr

ogra

mm

atic

ally

, the

n a

new

AM

P s

hou

ld b

e cr

eat

ed.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

A

num

ber

of l

ice

nsee

s h

ave

chos

en n

ot to

follo

w

ind

ustr

y g

uid

elin

es a

nd

are

man

agi

ng

the

degr

adat

ion

caus

ed b

y er

osio

n th

roug

h on

goin

g m

onito

ring

act

iviti

es in

lieu

of

corr

ectin

g th

e ca

use

of th

e pr

oble

m.

Reg

ardi

ng

the

pro

posa

l to

cre

ate

a ne

w A

MP

, see

the

staf

f res

pons

e to

co

mm

ent 1

-1.

No

cha

nge

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

2-6

D

iscu

ssio

n:

GA

LL R

epo

rt A

MP

XI.M

17, ’

Flo

w-

Acc

eler

ated

Cor

rosi

on,

’ man

ages

wa

ll th

inn

ing

due

to F

AC

an

d is

est

ablis

hed

and

wid

ely

use

d b

y in

dus

try.

H

ow

ever

, the

exi

stin

g gu

idan

ce in

th

is p

rogr

am is

not

fully

ap

plic

able

to w

all

thin

nin

g du

e to

ero

sio

n m

ech

anis

ms.

F

or

exam

ple

, the

“m

onito

ring

and

tren

din

g” p

rog

ram

el

emen

t of G

ALL

Re

port

AM

P X

I.M17

incl

ude

s th

e us

e of

sof

twa

re to

iden

tify

loca

tions

su

scep

tible

to w

all

thin

nin

g d

ue to

FA

C, b

ut th

e so

ftw

are

does

not

pre

dic

t sus

cept

ible

loca

tions

.

Ero

sio

n m

echa

nism

s sh

oul

d n

ot b

e m

ana

ged

b

y “m

oni

tori

ng a

nd tr

endi

ng.”

T

he in

dust

ry

guid

elin

es a

lso

sta

ted

that

this

def

icie

ncy

will

be

corr

ecte

d d

urin

g th

e cu

rren

t te

rm o

f ope

ratio

n.

In

that

reg

ard,

the

Sta

tem

ent

of C

onsi

der

atio

ns

(60

FR

224

61,

224

69; M

ay

8, 1

995)

for

10 C

FR

P

art 5

4 no

tes

that

cor

rect

ive

actio

ns th

at s

hou

ld

be ta

ken

to a

ddr

ess

func

tiona

l deg

rada

tion

logi

cally

incl

ude

caus

e d

eter

min

atio

ns,

whi

ch

coul

d in

volv

e m

echa

nism

s ot

her

than

agi

ng

(e.g

., im

prop

er o

pera

tion)

, but

that

cor

rect

ive

actio

ns s

hou

ld f

ocus

on

prev

ent

ion,

elim

inat

ion,

or

man

age

me

nt

of th

e ef

fect

s ca

use

d b

y th

ese

mec

hani

sms.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e in

itial

par

t of t

he p

ropo

sed

reso

lutio

n.

Alth

ough

indu

stry

gui

del

ines

ma

y st

ate

that

ero

sion

mec

han

ism

s w

ill b

e co

rrec

ted

duri

ng th

e cu

rren

t ter

m o

f ope

ratio

n, li

cens

ee

s ha

ve c

hos

en

not

to

follo

w in

dus

try

gui

del

ine

s b

y in

stea

d m

anag

ing

the

agi

ng

effe

ct (

loss

of

mat

eria

l) ca

used

by

thes

e m

echa

nism

s.

Indu

stry

gui

delin

es s

tate

that

cav

itatio

n m

ay

nee

d to

be

incl

ude

d in

the

AM

R in

cer

tain

ci

rcum

stan

ces.

T

he S

tate

men

t of

Con

side

ratio

ns fo

r th

e 10

CF

R P

art 5

4 fin

al r

ule

(60

FR

224

61,

224

69; M

ay

8, 1

995)

sta

tes

that

th

e pr

oper

ap

pro

ach

for

a lic

ens

e re

ne

wa

l was

on

e th

at fo

cuse

s on

miti

gat

ing

the

detr

ime

ntal

ef

fect

s of

agi

ng r

egar

dle

ss o

f the

mec

han

ism

, an

d n

otes

that

cor

rect

ive

actio

ns s

hou

ld fo

cus

on p

reve

ntio

n, e

limin

atio

n or

man

age

me

nt o

f th

e ef

fect

s ca

use

d b

y th

e m

echa

nis

m(s

). T

his

LR-I

SG

onl

y a

ddre

sses

tho

se s

ituat

ions

wh

ere

er

osio

n m

ech

ani

sms

are

bei

ng

man

age

d, s

ince

th

ey

have

not

bee

n pr

even

ted

or e

limin

ate

d.

H

ow

ever

, in

orde

r to

mor

e cl

ear

ly d

istin

guis

h

betw

een

act

iviti

es fo

r F

AC

an

d er

osio

n m

echa

nism

s, s

ee c

omm

ent

1-4

3 fo

r ch

ange

s to

A

MP

XI.M

17 in

the

“mon

itori

ng

and

tren

ding

” pr

ogra

m e

lem

ent

.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-1

9

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-7

D

iscu

ssio

n:

As

note

d in

SR

P-L

R S

ectio

n 2.

1.3.

2.2,

“Lo

ng-

Live

d,”

pass

ive

com

pone

nts

that

are

not

rep

lace

d on

the

bas

is o

f a q

ual

ified

lif

e or

spe

cifie

d ti

me

perio

d re

quir

e an

agi

ng

man

age

me

nt r

evie

w (

AM

R)

und

er 1

0 C

FR

54

.21(

a)(1

)(ii)

. SR

P-L

R S

ectio

n 2.

1.3.

2.2

also

st

ates

that

com

pon

ents

rep

lace

d on

the

basi

s of

co

nditi

on a

re n

ot g

ener

ical

ly e

xclu

ded

from

an

AM

R, a

nd c

ondi

tion

mon

itori

ng

ma

y be

ev

alua

ted

as a

pro

gram

to e

nsur

e fu

nctio

nalit

y du

ring

the

per

iod

of e

xten

ded

ope

ratio

n. If

an

app

lica

nt h

as im

plem

ent

ed a

rep

lace

me

nt

stra

tegy

for

sus

cept

ible

item

s, s

uch

as

repl

acem

ent

freq

uen

cy th

at u

tiliz

es a

ctu

al w

all

thin

nin

g da

ta fr

om p

ast p

lant

-spe

cific

ope

ratin

g ex

peri

ence

, the

n th

e st

aff r

ecog

niz

es th

ese

item

s do

not

mee

t the

def

initi

on

of lo

ng-l

ive

d,

pass

ive

com

pone

nts

and,

ther

efor

e, th

ey

do n

ot

have

to b

e m

ana

ged

for

agin

g w

ithin

the

cont

ext

of

lice

nse

ren

ew

al.

Ho

we

ver,

if o

ther

str

ateg

ies

to m

anag

e th

e ag

ing

of th

e su

scep

tible

item

s ar

e ut

ilize

d, s

uch

as

repl

acem

ent

base

d on

per

iodi

c m

onito

ring

for

loss

of m

ater

ial b

y w

all

thic

kne

ss

mea

sure

men

ts,

then

thes

e ite

ms

shou

ld b

e m

ana

ged

for

agi

ng,

and

this

IS

G is

app

licab

le.

Sin

ce m

ost u

tiliti

es a

ddre

ss d

am

age

d ar

eas

ca

use

d b

y er

osio

n m

echa

nis

ms

wh

en id

ent

ified

an

d d

o no

t tre

at e

rosi

on a

s “l

ong

-live

d” w

ear

, th

e co

mm

ents

in th

is s

ectio

n sh

ould

be

heig

hte

ned

for

aw

aren

ess.

S

hou

ld a

ne

w A

MP

be

proc

ess

ed s

tric

tly fo

r er

osio

n, th

is s

tate

men

t ad

dre

ssin

g A

MP

ex

clus

ion

shou

ld b

e fo

refr

ont

in th

e di

scus

sio

n.

The

sta

ff ag

ree

s w

ith th

e co

mm

ents

, and

ch

ange

d th

e pr

ogra

m d

escr

iptio

n to

he

ight

en

the

aw

aren

ess

of th

e ap

plic

abi

lity

of th

e A

MP

to

eros

ion.

A

lso

see

resp

onse

s to

com

men

ts 1

-38

and

1-39

. T

he s

taff

also

not

es th

at th

e LR

-IS

G c

urre

ntly

ad

dres

ses

situ

atio

ns w

her

e lic

ense

es c

orre

ct

the

caus

e(s)

of

eros

ion

degr

ada

tion,

and

sta

tes

that

this

LR

-IS

G w

oul

d n

ot a

ppl

y.

Ho

wev

er, a

nu

mb

er o

f lic

ens

ees

hav

e ch

osen

to m

anag

e th

e de

grad

atio

n ca

use

d b

y er

osio

n th

rou

gh

ong

oin

g m

onito

ring

activ

ities

in li

eu

of

corr

ectin

g th

e ca

use

of th

e pr

oble

m.

The

pr

eva

lenc

e of

this

ap

proa

ch b

y lic

ense

es

prom

pte

d th

e st

aff t

o is

sue

this

LR

-IS

G,

whi

ch

refle

cts

one

ap

proa

ch to

man

age

eros

ion

mec

hani

sms

that

is a

ccep

tabl

e to

the

sta

ff. N

o ch

ange

wa

s m

ade

to th

e L

R-I

SG

in r

espo

nse

to

this

com

men

t.

2-8

D

iscu

ssio

n:

GA

LL R

epo

rt A

MP

XI.M

17, “

Flo

w-

Acc

eler

ated

Cor

rosi

on,

” m

anag

es w

all

thin

nin

g du

e to

FA

C a

nd

is w

ell

esta

blis

hed

and

wid

ely

us

ed b

y in

dust

ry.

Ho

we

ver,

the

exi

stin

g gu

idan

ce in

this

pro

gram

is n

ot fu

lly a

pplic

abl

e to

w

all

thin

nin

g d

ue to

ero

sion

mec

hani

sms.

For

ex

amp

le, t

he “

mon

itori

ng a

nd tr

endi

ng”

pro

gra

m

elem

ent o

f GA

LL R

epo

rt A

MP

XI.M

17 in

clu

des

the

use

of s

oftw

are

to id

entif

y lo

catio

ns

susc

eptib

le to

wa

ll th

inn

ing

due

to F

AC

, but

the

soft

war

e do

es n

ot p

red

ict s

usce

ptib

le lo

catio

ns

rela

ted

to e

rosi

on. A

lso,

the

“cor

rect

ive

actio

ns”

pr

ogra

m e

lem

ent

incl

ude

s th

e re

plac

eme

nt o

f su

scep

tible

com

pone

nts

with

FA

C-r

esis

tant

m

ater

ial,

such

as

hig

h ch

rom

ium

ste

el,

whi

ch

does

not

nec

essa

rily

prev

ent

wa

ll th

inn

ing

due

to

eros

ion

mec

ha

nism

s. A

s su

ch, a

dditi

ona

l co

nsid

erat

ion

is n

eed

ed to

ad

dres

s w

all

thin

nin

g du

e to

ero

sio

n m

echa

nism

s.

Add

ition

al w

all

thin

nin

g du

e to

ero

sio

n m

echa

nism

s sh

ould

be

addr

ess

ed in

a n

ew

and

se

para

te A

MP

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

See

re

spo

nses

to c

omm

ents

1-2

4, 1

-30,

1-4

3, a

nd

2-6

reg

ardi

ng c

han

ges

to c

lari

fy th

e a

pplic

abi

lity

of th

e ea

ch e

lem

ent f

or F

AC

or

eros

ion

mec

hani

sms.

R

egar

ding

the

prop

osal

to c

reat

e a

new

or

sepa

rate

AM

P, s

ee th

e st

aff r

espo

nse

to

com

men

t 1-1

. N

o ch

ange

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-2

0

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-9

[S

ame

sect

ion

quot

ed

as 2

-8]

The

add

itio

nal c

onsi

dera

tion

not

ed s

houl

d be

in

the

form

[of]

a ne

w A

MP

an

d no

t inc

orpo

rate

d in

to [

XI.]

M17

.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

Reg

ardi

ng th

e pr

opos

al to

cre

ate

a ne

w A

MP

, se

e th

e st

aff r

espo

nse

to c

omm

ent 1

-1.

No

chan

ge w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

th

is c

omm

ent.

2-

10

Dis

cuss

ion

– C

larif

icat

ions

to D

efin

ition

s:

Sec

tion

IX.E

, “A

gin

g E

ffect

s,”

of th

e G

ALL

R

epor

t cur

rent

ly in

clu

des

“ero

sion

,” a

nd

“flo

w

acce

lera

ted

corr

osio

n,”

in it

s de

finiti

on o

f “lo

ss o

f m

ater

ial,”

but

onl

y in

clud

es “

cavi

tatio

n” fo

r co

ncre

te s

truc

ture

s. S

ectio

n IX

.F, “

Sig

nific

ant

Agi

ng

Mec

han

ism

s,”

of th

e G

ALL

Re

port

def

ines

“e

rosi

on”

as

the

“loss

of m

ate

rial f

rom

a s

olid

su

rfac

e…d

ue to

mec

hani

cal i

nter

actio

n be

twee

n th

at s

urfa

ce a

nd

a flu

id.”

In a

ddi

tion,

it d

efin

es

“flo

w-a

cce

lera

ted

corr

osio

n” a

s th

e “c

o-jo

int

activ

ity in

volv

ing

corr

osio

n an

d er

osio

n in

the

pres

enc

e of

a m

ovin

g co

rros

ive

fluid

lea

din

g to

th

e ac

cele

rate

d lo

ss o

f mat

eria

l.” A

lthou

gh th

e G

ALL

Rep

ort d

efin

ition

ass

ocia

tes

flow

-ac

cele

rate

d co

rros

ion

with

ero

sio

n, E

PR

I Rep

ort

106

611,

“F

low

-Acc

eler

ated

Cor

rosi

on

in P

ow

er

Pla

nts,

” st

ates

tha

t F

AC

is “

a pu

re c

orro

sio

n pr

oces

s th

at d

oes

not h

ave

an

eros

ion

com

pone

nt.”

Sin

ce e

rosi

on is

not

invo

lve

d in

the

F

AC

pro

cess

, as

the

GA

LL R

epor

t def

initi

on

sugg

ests

, thi

s m

ay

lea

d to

som

e co

nfus

ion

and

in

cons

iste

ncie

s in

ho

w N

RC

gui

dan

ce is

app

lied.

In

add

ition

, Se

ctio

n IX

.E o

f the

GA

LL R

epor

t cu

rren

tly d

efin

es “

wa

ll th

inn

ing”

as

an a

gin

g ef

fect

that

“is

a s

peci

fic t

ype

of

loss

of m

ater

ial

attr

ibut

ed to

ge

nera

l cor

rosi

on o

r flo

w-

acce

lera

ted

corr

osio

n.”

In li

ght o

f thi

s di

scus

sion

, th

e de

finiti

ons

of t

hese

ag

ing

effe

cts

and

thei

r as

soci

ated

me

chan

ism

s ne

ed

to b

e re

vise

d to

in

clu

de a

dditi

ona

l mec

han

ism

s as

soci

ate

d w

ith

eros

ion.

Ero

sio

n is

not

an

agin

g m

ech

anis

m in

pip

ing

sy

stem

s.

Ero

sion

in p

ipin

g sy

stem

s is

the

resu

lt of

des

ign

def

icie

ncie

s, m

alfu

nctio

ning

co

mpo

nent

s or

abn

orm

al s

yste

m o

pera

tion.

T

he d

efin

itio

ns in

the

GA

LL R

epor

t sho

uld

be

revi

sed

to d

isco

nnec

t FA

C a

nd

eros

ion

as

sim

ilar

we

ar m

echa

nism

s.

The

sta

ff no

tes

that

the

EP

RI r

epor

t cite

d in

the

draf

t has

be

en c

han

ged

in th

e fi

nal L

R-I

SG

. T

he s

taff

agre

es

with

the

com

men

t, bu

t di

sagr

ees

with

the

prop

ose

d re

solu

tion.

T

he

NR

C m

odifi

ed

10 C

FR

Par

t 54

in 1

995

to

chan

ge th

e fo

rm o

f the

AM

R to

man

age

the

effe

cts

of a

ging

on

func

tiona

lity

inst

ead

of

man

agi

ng

agin

g m

echa

nism

s.

In th

at r

egar

d,

eros

ion

and

FA

C c

ause

a s

imila

r ag

ing

effe

ct,

loss

of m

ater

ial,

but t

hrou

gh d

iffer

ent

mec

hani

sms.

W

hile

som

e er

osio

n m

echa

nism

s m

ay

be

caus

ed b

y a

des

ign

defic

ienc

y, if

lic

ense

es h

ave

cho

sen

to m

ana

ge

this

de

grad

atio

n th

roug

h on

goin

g m

onito

ring

activ

ities

inst

ead

of th

roug

h de

sign

or

oper

atio

nal

ch

ang

es, t

hen

thes

e m

onito

ring

ac

tiviti

es n

eed

to b

e pa

rt o

f an

AM

P.

No

chan

ge w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

th

is c

omm

ent;

how

eve

r, th

e L

R-I

SG

spe

cific

ally

ch

ange

d th

e d

efin

ition

of F

AC

to r

emov

e th

e te

rm e

rosi

on

due

to th

e po

ten

tial f

or c

onfu

sio

n.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-2

1

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-11

D

iscu

ssio

n –

Cla

rific

atio

ns to

Def

initi

ons:

E

rosi

on

in p

ipin

g is

cau

sed

by

fluid

mot

ion

that

ca

n in

volv

e ca

vita

tion,

flas

hin

g, li

quid

dro

plet

im

pin

gem

ent,

and

solid

par

ticle

impi

ngem

ent,

w

hic

h ar

e fo

un

d in

man

y w

ate

r sy

stem

s. E

rosi

on

mec

hani

sms

are

som

etim

es p

erce

ived

as

bei

ng

com

para

ble

to w

all

thin

nin

g d

ue to

FA

C;

how

eve

r, th

ese

oth

er m

echa

nism

s ar

e no

t ad

dres

sed

in th

e pr

edi

ctio

n m

etho

dol

og

y fo

r F

AC

pro

gram

s. B

ased

on

staf

f re

vie

ws

of

ind

ustr

y-w

ide

ope

ratin

g e

xper

ienc

e, th

ese

add

ition

al m

echa

nis

ms

requ

ire

furt

her

cons

ider

atio

n to

ens

ure

that

pas

sive

co

mpo

nent

s ar

e be

ing

mai

ntai

ned

cons

iste

nt

with

the

curr

en

t lic

ensi

ng b

asis

.

Ero

sio

n is

not

FA

C a

nd is

not

add

ress

ed in

F

AC

pro

gram

s.

If re

quire

d, a

ne

w A

MP

sho

uld

be

cre

ate

d fo

r er

osio

n an

d no

t inc

lud

ed in

[X

I.]M

17.

The

sta

ff ag

ree

s w

ith th

e co

mm

ent,

but

disa

gree

s w

ith th

e pr

opos

ed

reso

lutio

n.

The

LR

-IS

G s

tate

s th

at e

rosi

on

is n

ot F

AC

and

is

not a

ddre

sse

d in

spe

cific

asp

ects

of t

he F

AC

pr

ogra

m.

Reg

ardi

ng th

e pr

opos

al to

cre

ate

a ne

w A

MP

, see

the

sta

ff re

spon

se to

co

mm

ent 1

-1.

No

cha

nge

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

2-12

D

iscu

ssio

n:

Cha

nge

s to

the

FA

C A

ging

M

ana

gem

ent

Pro

gram

. [X

I.]M

17 s

houl

d no

t be

revi

sed

to a

ddre

ss

eros

ion

mec

ha

nism

s.

If re

quire

d a

new

AM

P

shou

ld b

e de

velo

ped

. A

ll re

fere

nces

to F

AC

pr

ogra

ms

man

agin

g th

e ef

fect

s of

ero

sion

m

echa

nism

s sh

ould

be

rem

oved

.

The

sta

ff di

sag

rees

with

the

pro

pose

d re

solu

tion.

R

ega

rdin

g a

new

AM

P, r

efer

to th

e st

aff r

espo

nse

to c

omm

ent 1

-1.

No

chan

ge

wa

s m

ade

in r

esp

onse

to th

is c

omm

ent.

2-13

G

ener

al:

AM

P 1

7.

AM

P M

17 s

houl

d n

ot b

e re

vise

d to

incl

ude

eros

ion

mec

ha

nism

s e

xce

pt to

ref

eren

ce a

ne

w

AM

P fo

r E

rosi

on M

echa

nism

s.

In th

e IS

G’s

ta

bles

wh

ere

the

Agi

ng

Man

agem

ent P

rogr

am

fo

r W

all T

hinn

ing

due

to E

rosi

on is

ref

ere

nce

s as

Cha

pter

XI.

M17

, “F

low

-Acc

eler

ated

C

orro

sion

,” r

epla

ce w

ith a

ref

ere

nce

to a

ne

w

AM

P fo

r E

rosi

on.

The

sta

ff di

sag

rees

with

the

pro

pose

d re

solu

tion.

R

ega

rdin

g a

new

AM

P, r

efer

to th

e st

aff r

espo

nse

to c

omm

ent 1

-1.

No

chan

ge

wa

s m

ade

to th

e LR

-IS

G in

re

spon

se to

this

co

mm

ent.

2-14

G

ener

al:

Ra

w W

ater

, Ser

vice

Wat

er, C

lose

d

Coo

ling

Wat

er a

nd o

ther

wat

er

syst

ems

([le

ss

than

] 20

0F)

are

cove

red

by

oth

er A

MP

s.

Ref

eren

ce/r

evis

e A

MP

s [X

I.M20

] an

d [X

I.]M

21A

to

add

ress

ero

sion

in th

ese

syst

ems.

T

he s

taff

agre

es

with

the

com

men

t, bu

t di

sagr

ees

with

the

prop

ose

d re

solu

tion.

T

he

LR-I

SG

cur

rent

ly d

iscu

sses

XI.

M20

, but

cla

rifie

s th

at th

e A

MP

onl

y ad

dres

ses

eros

ion

due

to

solid

par

ticle

s in

ra

w w

ate

r sy

stem

s an

d do

es

not i

nclu

de

oth

er fo

rms

of e

rosi

on.

Thi

s LR

-IS

G r

efle

cts

one

appr

oac

h to

man

age

eros

ion

mec

ha

nism

s th

at is

acc

epta

ble

to th

e st

aff,

and

it do

es n

ot p

recl

ude

an a

pplic

ant f

rom

ci

ting

gene

ric n

ote

E to

indi

cate

that

a d

iffer

ent

A

MP

is c

redi

ted.

N

o ch

ange

wa

s m

ade

to th

e LR

-IS

G in

res

pons

e to

thi

s co

mm

ent.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-2

2

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-15

A

ppe

ndix

A:

The

follo

win

g ta

ble[

s] in

A

ppe

ndix

A a

ll be

gin

to d

iscu

ss a

dditi

onal

sc

opin

g fo

r th

e F

AC

AM

P.

Man

y of

thes

e lo

catio

ns, s

yste

ms,

str

uctu

res,

com

pone

nts

are

mon

itore

d b

y o

ther

pro

gram

s, a

nd s

hou

ld n

ot b

e du

plic

ate

d, fo

r ex

amp

le b

urie

d pi

pin

g, o

r ra

w

wat

er.

Sco

pe o

f thi

s IS

G d

oesn

’t lim

it its

elf t

o pi

ping

/com

pon

ents

.

The

cur

rent

ind

ustr

y pr

ogr

ams

are

set u

p th

at

the

prim

ary

focu

s is

pip

ing

and

pres

sure

re

tain

ing

com

pon

ent

s.

Add

ing

stru

ctur

es s

uch

as

ves

sel i

nter

nals

etc

. w

ould

not

be

appr

opri

ate

as t

here

are

mor

e s

peci

fic a

nd

adva

nce

d m

onito

ring

tech

niqu

es u

sed.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

new

item

s b

eing

ad

ded

to th

e S

RP

-LR

and

the

GA

LL R

epor

t on

ly c

ite “

pip

ing,

pip

ing

com

pon

ent

s, a

nd p

ipin

g el

emen

ts.”

H

owe

ver,

the

staf

f not

es th

at

NS

AC

-202

L cu

rren

tly in

clud

es in

spec

tions

of

feed

wat

er h

eat

ers,

wh

ich

are

not p

ipin

g, p

ipin

g co

mpo

nent

s, o

r pi

ping

ele

me

nts.

N

o ch

ang

e w

as

mad

e to

the

LR-I

SG

in r

esp

onse

to th

is

com

men

t. 2-

16

App

end

ix A

, Tab

le 3

.1-1

: T

his

sect

ion

men

tions

th

e A

MP

for

reac

tor

vess

el, i

nte

rnal

s, a

nd

RC

S.

If th

is ta

ble

is s

ugg

estin

g ad

din

g th

ese

loca

tions

to

the

susc

eptib

ility

, or

SN

M p

ortio

n of

the

FA

C

prog

ram

, thi

s is

just

one

exa

mpl

e of

ho

w g

reat

ly

this

ISG

cou

ld im

pact

the

scop

e of

the

prog

ram

ex

pand

ing

it si

gnifi

cant

ly a

nd n

eces

sita

ting

a

sign

ifica

nt e

xpen

se to

rec

ons

ider

an

d re

-ev

alua

te a

ll su

scep

tible

loca

tions

. T

hese

are

as

wo

uld

oth

erw

ise

be c

omp

lete

ly e

xclu

ded

by

the

prog

ram

due

to m

ater

ials

, sys

tem

con

diti

ons,

et

c.

Pro

vide

mor

e in

form

atio

n in

to w

hat

this

Tab

le is

ac

tual

ly s

ugge

stin

g or

imp

lyin

g.

If it

is im

plyi

ng

that

ero

sio

n m

ay

be p

ossi

ble

in th

ese

syst

em

s an

d lo

catio

ns, a

nd th

at it

ne

eds

to b

e m

onito

red

by

the

FA

C A

MP

, w

hich

cou

ld b

e a

pro

blem

pr

ogra

mm

atic

ally

.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

intr

oduc

tion

of n

ew

A

MR

item

s do

es n

ot c

hang

e th

e id

ent

ifica

tion

of

agin

g ef

fect

s re

quiri

ng

man

age

me

nt, s

ince

the

SR

P-L

R a

nd th

e G

ALL

Rep

ort

are

not t

o be

us

ed fo

r sc

opin

g an

d sc

reen

ing.

N

EI 9

5-10

st

ates

that

agi

ng

effe

cts

requ

irin

g m

ana

gem

ent

ar

e id

entif

ied

usi

ng g

uid

ance

from

var

ious

in

dus

try

doc

umen

ts a

nd o

pera

ting

exp

erie

nce

re

vie

ws,

and

that

if th

ere

is n

o c

orre

spo

ndin

g

GA

LL R

epor

t ite

m, t

hen

a pl

ant

-spe

cific

agi

ng

eval

uatio

n is

re

quir

ed.

If m

onito

ring

wa

ll th

ickn

ess

for

eros

ion

mec

hani

sms

is n

ot

nee

ded

at a

faci

lity,

the

n th

e A

MR

item

s ca

n b

e tr

eate

d as

“n

ot a

pplic

abl

e,”

sim

ilar

to o

ther

AM

R

item

s.

How

eve

r, in

res

pons

e to

com

men

ts 1

-33

, the

sta

ff de

lete

d th

e ne

w it

em in

IV-C

2 fo

r w

all

thin

nin

g d

ue to

ero

sion

in th

e re

acto

r co

olan

t sys

tem

of P

WR

s.

2-17

A

ppe

ndix

A, T

able

3.2

-1:

AM

P fo

r E

ngin

eer

ed

Saf

ety

Fea

ture

s ev

alu

ated

in C

hapt

er V

of

GA

LL.

Incl

udin

g ar

eas

in th

ese

sys

tem

s or

lo

catio

ns w

oul

d gr

eatly

incr

eas

e th

e sc

ope

of t

he

prog

ram

, man

y ar

eas

that

wo

uld

hav

e ot

her

wis

e an

d pr

evio

usly

bee

n e

xclu

ded.

Thi

s IS

G a

ppe

ars

to h

ave

the

pot

entia

l to

have

a

com

plet

ely

ope

n p

ossi

bilit

y fo

r sc

ope

expa

nsio

n as

it s

eem

s to

arg

ue

that

an

y an

d al

l lo

catio

ns a

re s

usce

ptib

le to

ero

sio

n.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

See

the

staf

f res

pons

e to

co

mm

ent 2

-16.

N

o ch

ang

es w

ere

ma

de to

the

LR-I

SG

in r

espo

nse

to t

his

com

men

t.

2-18

A

ppe

ndix

A, T

able

3.3

-1; A

MP

for

Aux

iliar

y S

yste

ms

eval

uat

ed in

Cha

pte

r V

II of

GA

LL.

Incl

udin

g ar

eas

in th

ese

syst

em

s/lo

catio

ns

wo

uld

gre

atly

incr

ease

the

scop

e of

the

prog

ram

, man

y ar

eas

that

wo

uld

hav

e ot

her

wis

e an

d pr

evio

usly

bee

n e

xclu

ded.

Thi

s IS

G a

ppe

ars

to h

ave

the

pot

entia

l to

have

a

com

plet

ely

ope

n p

ossi

bilit

y fo

r sc

ope

expa

nsio

n as

it s

eem

s to

arg

ue

that

an

y an

d al

l lo

catio

ns a

re s

usce

ptib

le to

ero

sio

n.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

See

the

staf

f res

pons

e to

co

mm

ent 2

-16.

N

o ch

ang

e w

as m

ade

to th

e

LR-I

SG

in r

espo

nse

to t

his

com

men

t.

App

endi

x E

: R

esol

utio

n of

Pub

lic C

omm

ents

on

Dra

ft LR

-IS

G-2

012-

01

E-2

3

No.

C

omm

ent

Pro

pose

d R

esol

utio

n

Sta

ff R

espo

nse

2-19

A

ppe

ndix

A, T

able

3.4

-1:

AM

P fo

r S

team

and

P

ow

er C

onve

rsio

n S

yste

m e

valu

ated

in

Cha

pter

VIII

of G

ALL

. In

clud

ing

area

s in

thes

e sy

stem

s/lo

catio

ns w

oul

d gr

eatly

incr

ease

the

sc

ope

of th

e pr

ogra

m, m

any

are

as th

at w

ould

ha

ve o

ther

wis

e a

nd p

revi

ous

ly b

een

exc

lude

d.

Thi

s IS

G a

ppe

ars

to h

ave

the

pot

entia

l to

have

a

com

plet

ely

ope

n p

ossi

bilit

y fo

r sc

ope

expa

nsio

n as

it s

eem

s to

arg

ue

that

an

y an

d al

l lo

catio

ns a

re s

usce

ptib

le to

ero

sio

n. T

his

seem

s m

ost a

ppr

opri

ate

in th

is a

rea,

as

man

y lo

catio

ns in

the

Ste

am a

nd P

ow

er

Sys

tem

s a

re

alre

ady

part

of

the

FA

C p

rogr

am, a

nd

cont

inui

ng

to m

onito

r lo

catio

ns w

hic

h ar

e kn

ow

n to

deg

rade

, eve

n af

ter

repl

acem

ent

with

m

ore

[res

ista

nt] m

ater

ials

see

ms

mor

e ap

prop

riat

e th

an

sign

ifica

ntly

incr

easi

ng

prog

ram

sco

pe a

s su

gges

ted

by

the

thre

e se

ctio

ns a

bove

.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

See

the

staf

f res

pons

e to

co

mm

ent 2

-16.

N

o ch

ang

e w

as m

ade

to th

e

LR-I

SG

in r

espo

nse

to t

his

com

men

t.

2-20

A

ppen

dix

B,

IV-C

2, V

-D1,

VII-

C1,

VII-

E1,

VII-

E3:

T

his

ISG

is p

ropo

sing

a n

umb

er o

f RC

S, E

CC

S,

Ope

n-C

ycle

Coo

ling,

Ser

vice

Wat

er, C

VC

S, a

nd

Rea

ctor

Wat

er C

lean

up s

yste

ms

to b

e ad

ded

to

the

prog

ram

(w

all t

hinn

ing)

SN

M,

whi

ch w

oul

d gr

eatly

incr

ease

the

scop

e of

the

mon

itori

ng

prog

ram

.

It w

ould

be

mo

re a

ppro

pria

te to

look

at i

ndu

stry

O

E fo

r pr

oble

m a

reas

wh

ere

ther

e ar

e kn

ow

n er

osiv

e m

echa

nism

s de

grad

ing

syst

ems

and

co

mpo

nent

s [in

ord

er to

] lim

it th

e sc

ope

incr

ease

.

The

sta

ff di

sag

rees

with

the

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

The

intr

oduc

tion

of n

ew

A

MR

item

s do

es n

ot c

hang

e th

e id

ent

ifica

tion

of

agin

g ef

fect

s, s

ince

the

SR

P-L

R a

nd th

e G

AL

L R

epor

t sho

uld

not t

o be

use

d fo

r sc

opin

g an

d sc

reen

ing.

B

eca

use

eros

ion

mec

hani

sms

are

not c

urre

ntly

incl

uded

in th

e G

ALL

Re

port

, the

in

trod

uctio

n of

ne

w A

MR

item

s w

ill e

limin

ate

the

nee

d fo

r ci

ting

gen

eric

not

e H

, for

an

agin

g ef

fect

not

in th

e G

ALL

Rep

ort.

N

o ch

ang

e w

as

mad

e to

the

LR

-IS

G in

res

pons

e to

this

co

mm

ent.

2-

21

All:

The

add

ition

of m

echa

nica

l ero

sion

m

echa

nism

s to

the

FA

C A

MP

wo

uld

be

detr

ime

ntal

to th

e w

ell

boun

ded

and

stru

ctur

ed

ind

ustr

y F

AC

pro

gram

s.

The

sus

cept

ibili

ty

base

s of

indu

stry

FA

C p

rogr

am

s ar

e cl

earl

y de

fined

and

the

incl

usio

n of

ero

sio

n m

echa

nism

s w

ould

cro

ss m

any

of th

ose

bou

ndar

ies.

Cre

ate

a se

para

te A

MP

for

mec

hani

cal e

rosi

on

mec

hani

sms.

The

sta

ff di

sag

rees

with

this

com

men

t an

d th

e pr

opos

ed r

esol

utio

n.

Reg

ard

ing

the

pro

posa

l to

crea

te a

sep

arat

e A

MP

, see

the

staf

f res

pon

se

to c

omm

ent 1

-1

No

chan

ge w

as

mad

e to

the

LR-I

SG

in r

espo

nse

to t

his

com

men

t.