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TRACE Code Analysis Results for TRACY and SILENE Benchmark Phase II. LIEM Peng Hong and NAITO Yoshitaka NAIS Co., Inc. Japan OECD/NEA/NSC Working Party on Nuclear Criticality Safety Meeting of the Expert Group on Criticality Excursion Analysis Knoxville, Sept. 22, 2005. Analysis Conditions. - PowerPoint PPT Presentation
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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
