pickering ‘a’ unit 4 boiler 6 hot source
DESCRIPTION
PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE. Scott Cameron Pickering B RPM. OUR GOAL. The Elimination or Control of this Hazard will allow P941 Outage work to proceed safely while minimizing extra dose to workers. >450,000 rem/h ESTIMATED CONTACT GAMMA DOSE RATE @ 1cm 18,000 rem/h @ 5cm - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/1.jpg)
PICKERING ‘A’UNIT 4 BOILER 6 HOT SOURCE
Scott Cameron
Pickering B RPM
![Page 2: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/2.jpg)
OUR GOAL
The Elimination or Control of this Hazard will allow P941 Outage work to proceed safely while minimizing extra dose to workers.
![Page 3: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/3.jpg)
PROBLEM STATEMENT
High Energy Source Identified in the Cold Leg Drain Line of Unit 4, Boiler 6
>450,000 rem/h ESTIMATED CONTACT
GAMMA DOSE RATE @ 1cm18,000 rem/h @ 5cm500 rem/h @ 30cm
350 rem/h JUST BELOW HOT LEG
DRAIN LINE
Hot Leg Drain Line
Cold Leg Drain Line
manway
Archived Photo Without Insulation On This is Boiler 12 Not Boiler 6
![Page 4: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/4.jpg)
SD
C 3
Ha
tch
Pre
ssu
rizin
gP
um
ps
PR
D P
an
els
SD
C 4
SD
C 2
LZ
De
lay
Ta
nk
Isolation Valves 1-6Isolation Valves 13-18
Isolation Valves 7-12Isolation Valves 19-24
SD
C 1
Re
activ
ityD
eck
AL
6
P5
P6
P7
P8
P1
3
P1
4
P1
5
P1
6
P1
P2
P3
P4
P9
P1
0
P1
1
P1
2
Bo
iler
4
Bo
iler
5
Bo
iler
6
Bo
iler
10
Bo
iler
11
Bo
iler
12
Bo
iler
1
Bo
iler
2
Bo
iler
3
Bo
iler
7
Bo
iler
8
Bo
iler
9
33
61
-CV
1 to
CV
43
33
1-P
13
33
1-P
2
MV
1
MV
2
MV
3
MV
4
MV
5
MV
6
MV
13
MV
14
MV
15
MV
16
MV
17
MV
18
MV
24
MV
23
MV
22
MV
21
MV
20
MV
19
MV
12
MV
11
MV
10
MV
9
MV
8
MV
7
MV
29
MV
30
MV
31
MV
32
MV
37
MV
38
MV
39
MV
40
MV
36
MV
35
MV
34
MV
33
MV
28
MV
27
MV
26
MV
25
Pre
ssu
reR
elie
fP
latfo
rm
AL
/5
MV
19
1
MV
19
0
MV
19
5
MV
19
4
MV
20
0
MV
19
9
MV
19
8
MV
19
7
N
Ble
ed
An
dF
ee
d P
latfo
rm
AREA THAT SOURCE AFFECTS
40’ top of stairs
27’ btm strs
29’ WPW wall
26’ top strs to feeders
35’ BO12-BO6
18’ to flange drain line
12’ danceflr
2900 mrem/h
450 mrem/h
2500 mrem/h
225 mrem/h
4500 mrem/h
200 mrem/h
![Page 5: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/5.jpg)
CLICK HERE TO RETURN TO
PREVIOUS SLIDE
>450,000 rem/h @ 1cm On Boiler Drain Line Elbow
500 rem/h @ 30cm
Boiler Base Boiler Base Pedestals Pedestals BOILER - 6BOILER - 6
1” to 3” of insulation to get to drain line
![Page 6: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/6.jpg)
PICTURES OF AREAPICTURES OF AREA
Drain Line Valve Drain Line Valve Under PHT Pumps Under PHT Pumps Along HT Catwalk, Along HT Catwalk, Flanged Off.Flanged Off.
![Page 7: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/7.jpg)
Perimeter Perimeter Walk WayWalk Way
200 mrem/h
![Page 8: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/8.jpg)
PICTURES OF AREAPICTURES OF AREA
Dance Floor
2.5 rem/h at Surveyor Position
![Page 9: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/9.jpg)
CATWALK
DANCE FLOOR
TRIM VALVE PLATFORM
TRIM VALVE PLATFORM
PERIMETER WALK WAY
![Page 10: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/10.jpg)
OPTIONS
1. FLUSH AND CAPTURE
2. IF FLUSH AND CAPTURE FAILS: 1) SHIELD BOILER 6 (USING LONG HANDLED TOOLS, ROPES) 2) RUN PARALLEL PLAN TO DO WORK ON EAST SIDE, DEVELOP PLAN FOR CUT OUT DURING P1041 OUTAGE
OR
3. DEVELOP PLAN FOR CUT OUT DURING THIS OUTAGE IF TIME PERMITS.
![Page 11: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/11.jpg)
OPTION DETAILS (cont’d)
1. FLUSH AND CAPTURE
OPERATIONAL METHOD:
Forced drain to a shielded catch container (particle will progress in drain line/drain hose to two IX Columns in parallel.
Risk-particle doesn’t move
Contingency- See Option 2 Above
Risk- Particle becomes lodged on route in steel line drain line before reaching tygon hose.
Contingency- Shield (depending on location). Continue with boiler campaign on west side, develop plan for next outage to cut out.
![Page 12: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/12.jpg)
DRAWING OF FLUSH AND CAPTURE OPTION 2
In Station Flasks With IX Column
Inside
Ice Plug Here For Double Isolation
Drain Manifold Flanged
Drain Valve 4-3311-V11
Drain Line - 18ft
CRANE
311’ B/R North
TOTE
Hot Spot Cold Leg Drain Line
TOTE
SIDE VIEW BOILER 6
![Page 13: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/13.jpg)
PREREQUISITE ACTIVITIES
1. Draft Work Plan
2. Address assessing requirements
3. Develop and procure tooling
4. Set up mock up
5. Acquire resources
6. Train
7. Transfer of Particle Issues
8. Target Dates
9. Approval of Back-Up Schedule and Implementation
![Page 14: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/14.jpg)
RISKS
a) Resources
b) Timeline
c) Cost
d) Dose Assignment
e) If particle has changed locations and no longer where we think it is
![Page 15: PICKERING ‘A’ UNIT 4 BOILER 6 HOT SOURCE](https://reader038.vdocuments.net/reader038/viewer/2022102718/56813680550346895d9e0d94/html5/thumbnails/15.jpg)
OPTIONS FLOWSHEET
FLUSH AND CAPTURE PARTICLE
YES
IS CAPTURE SUCCESSFUL?
PROCEED WITH REGULAR OUTAGE
SCOPE
NOSHIELD BOILER 6 AS BEST AS POSSIBLE.
MOVE TO EAST BOILERS AND LEAVE FOR NEXT OUTAGE 1041 OR CUT OUT IN PARALLEL ON 941.