trace code analysis results for tracy and silene benchmark phase ii

TRACE Code Analysis Resultsfor TRACY and SILENE

Benchmark Phase II

LIEM Peng Hong and NAITO YoshitakaNAIS Co., Inc.

Japan

OECD/NEA/NSC Working Party on Nuclear Criticality SafetyMeeting of the Expert Group on Criticality Excursion Analysis

Knoxville, Sept. 22, 2005

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

2

Analysis Conditions

Kinetic Parameters SRAC cell calculation code + JENDL-3.3 library

(PIJ 107 group, ANISN 16 group) CITATION, TWOTRAN transport code (2-D,

annulus core cylindrical geometry, 16 group) Simplifications for TRACE

Annulus core to cylindrical core Linear ramp reactivity input

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

3

TRACY R61 Result(1)

1e+002

1e+003

1e+004

1e+005

1e+006

1e+007

1e+008

0 20 40 60 80 100

Fis

sio

n R

ate

(W

), T

ota

l F

issio

n (

J)

Time (s)

Fission RateTotal Fissionpower (exp.)

1e+005

1e+006

1e+007

1e+008

20 20.5 21 21.5 22

Fis

sio

n R

ate

(W

)

Time (s)

Fission Ratepower (exp.)

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

4

TRACY R61 Result(2)

-4.0

-2.0

0.0

2.0

4.0

0 20 40 60 80 100

Reactivity (

$)

Time (s)

additiontemp. feedbackvoid feedback

net

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

5

TRACY R61 Result(3)

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

0 20 40 60 80 100

Tem

pera

ture

(C

)

Time (s)

liquid (ave.)wall

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

6

TRACY R76 Result(1)

1e+002

1e+003

1e+004

1e+005

1e+006

1e+007

1e+008

60 80 100 120 140 160 180 200 220

Fis

sio

n R

ate

(W

), T

ota

l F

issio

n (

J)

Time (s)

Fission RateTotal Fissionpower (exp.)

1e+004

1e+005

1e+006

1e+007

1e+008

74 76 78 80 82 84

Fis

sio

n R

ate

(W

)

Time (s)

Fission Ratepower (exp.)

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

7

TRACY R76 Result(2)

-4.0

-2.0

0.0

2.0

4.0

60 80 100 120 140 160 180 200 220

Reactivity (

$)

Time (s)

additiontemp. feedbackvoid feedback

net

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

8

TRACY R76 Result(3)

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

60 80 100 120 140 160 180 200 220

Tem

pera

ture

(C

)

Time (s)

liquid (ave.)wall

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

9

TRACY R159 Result(1)

1e+001

1e+002

1e+003

1e+004

1e+005

1e+006

1e+007

1e+008

0 100 200 300 400 500 600 700

Fis

sio

n R

ate

(W

), T

ota

l F

issio

n (

J)

Time (s)

Fission RateTotal FissionPower (exp)

1e+001

1e+002

1e+003

1e+004

1e+005

1e+006

100 150 200 250 300

Fis

sio

n R

ate

(W

), T

ota

l F

issio

n (

J)

Time (s)

Fission RatePower (exp)

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

10

TRACY R159 Result(2)

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

0 100 200 300 400 500 600 700

Reactivity (

$)

Time (s)

additiontemp. feedbackvoid feedback

net

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

11

TRACY R159 Result(3)

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

0 100 200 300 400 500 600 700

Tem

pera

ture

(C

)

Time (s)

liquid (ave.)wall

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

12

SILENE LE1-641 Result(1)

1.0e+011

1.0e+012

1.0e+013

1.0e+014

1.0e+015

1.0e+016

1.0e+017

1.0e+018

0 20 40 60 80 100

Fis

sio

n R

ate

(fissio

ns/s

ec),

Tota

l F

issio

n (

fissio

ns)

Time (s)

Fission RateTotal Fission

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

13

SILENE LE1-641 Result(2)

-4.0

-2.0

0.0

2.0

4.0

0 20 40 60 80 100

Reactivity (

$)

Time (s)

additiontemp. feedbackvoid feedback

net

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

14

SILENE LE1-641 Result(3)

20.0

40.0

60.0

80.0

100.0

120.0

0 20 40 60 80 100

Tem

pera

ture

(C

)

Time (s)

liquid (ave.)wall

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

15

Results SummaryExperiment TRACY SILENE

Run Number R159 R61 R76 LE1-641

Max. Inverse Period (1/s) 0.18 35.7 13.6 21.0

First Peak Power (W) 1.02E+05 1.67E+07 4.42E+06 9.13E+05

Energy to First Peak (J) 1.78E+06 8.63E+05 6.20E+05 7.95E+04

First Peak Time (s) 193.5 20.6 76.0 11.3

Energy to First Min. (J) 4.12E+06 3.53E+06 4.23E+06 7.23E+05

First Min. Time (s) 227.6 38.0 91.7 18.0

Total Energy (J) 6.85E+06 1.07E+07 2.11E+07 2.98E+06

Final Temp. ( C) 45.8 52.4 74.1 81.3

Peak Pressure (Pa) 2.53E+04 2.78E+04 2.86E+04 5.38E+04

Peak Pressure Time (s) 219.5 39.6 93.8 19.0

Delayed Neut. Fract. 7.44E-03 7.35E-03 7.37E-03 7.48E-03

Prompt Neut. Lifetime (s) 4.51E-05 4.74E-05 4.88E-05 3.34E-05

Temp. React. Coef. (cent/C) -3.98 -3.11 -3.93 -4.03

Void React. Coef. (cent/%) -58.5 -57.0 -58.7 -88.1

OECD/NEA Expert Group on Criticality Excursion Analysis (Knoxville, 2005)

16

Future Works

Long-term simulation for SILENE LE1-641 Inclusion of heat removal effect (structural

materials and natural circulation of air) Some revision works for Benchmark Phase I