336
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.45 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-1 (FFAG acc.) (ρ pcm, MCNP = 3111.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1125.38 ± 3.78 1108.71 ± 2.00
3.61854 ± 0.01663
4.82085 ± 0.03293
Fiber #2 1562.44 ± 8.03 1408.09 ± 3.66
11.70733 ± 0.11908 17.24558 ± 0.23977
Fiber #3 1375.56 ± 9.41 1228.52 ± 3.31
11.30293 ± 0.09279 20.07291 ± 0.26831
BF-3 #1
966.22 ± 6.00
918.48 ± 4.72
2.78717 ± 0.02319
3.77369 ± 0.04428
BF-3 #2 1074.85 ± 6.02 1026.24 ± 4.77
3.59930 ± 0.03212
5.05178 ± 0.06129
BF-3 #3
942.83 ± 6.41
887.37 ± 4.69
2.66206 ± 0.02245
3.49706 ± 0.04260
Table A4.46 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-2 (FFAG acc.) (ρ pcm, MCNP = 3906.2 ± 5.8 [pcm])
Detector PNS method
Feynman-α
method
Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1391.13 ± 7.52
1373.04 ± 3.26
4.38045 ± 0.03693
5.64980 ± 0.07543
Fiber #2 1923.49 ± 17.25 1716.23 ± 6.16 14.51611 ± 0.28260 22.32025 ± 0.61495
Fiber #3 1702.94 ± 13.19 1472.83 ± 6.22 13.26441 ± 0.20715 23.86036 ± 0.50561
BF-3 #1 1207.87 ± 10.66 1126.86 ± 7.24
3.42911 ± 0.04326
5.05718 ± 0.09525
BF-3 #2 1330.03 ± 9.58
1243.59 ± 6.73
4.43292 ± 0.05867
6.80633 ± 0.12576
BF-3 #3 1174.22 ± 9.88
1065.23 ± 6.45
3.42483 ± 0.04214
4.81459 ± 0.08743
Table A4.47 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-3 (FFAG acc.) (ρ pcm, MCNP = 4216.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1510.24 ± 8.97 1496.27 ± 3.55
4.72259 ± 0.03967 5.79531 ± 0.08473
Fiber #2 2057.82 ± 19.03 1864.81 ± 7.14
15.98057 ± 0.31846 24.43068 ± 0.71408
Fiber #3 1869.31 ± 13.40 1603.28 ± 7.06
14.01938 ± 0.22056 26.06993 ± 0.56158
BF-3 #1 1289.31 ± 9.06 1187.38 ± 4.89
3.67468 ± 0.03501 5.55305 ± 0.08255
BF-3 #2 1446.93 ± 8.78 1349.98 ± 4.44
4.94667 ± 0.05298 7.56721 ± 0.11849
BF-3 #3 1297.96 ± 8.56 1163.16 ± 5.11
3.61958 ± 0.03220 5.43031 ± 0.07652
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.45 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-1 (FFAG acc.) (ρ pcm, MCNP = 3111.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1125.38 ± 3.78 1108.71 ± 2.00
3.61854 ± 0.01663
4.82085 ± 0.03293
Fiber #2 1562.44 ± 8.03 1408.09 ± 3.66
11.70733 ± 0.11908 17.24558 ± 0.23977
Fiber #3 1375.56 ± 9.41 1228.52 ± 3.31
11.30293 ± 0.09279 20.07291 ± 0.26831
BF-3 #1
966.22 ± 6.00
918.48 ± 4.72
2.78717 ± 0.02319
3.77369 ± 0.04428
BF-3 #2 1074.85 ± 6.02 1026.24 ± 4.77
3.59930 ± 0.03212
5.05178 ± 0.06129
BF-3 #3
942.83 ± 6.41
887.37 ± 4.69
2.66206 ± 0.02245
3.49706 ± 0.04260
Table A4.46 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-2 (FFAG acc.) (ρ pcm, MCNP = 3906.2 ± 5.8 [pcm])
Detector PNS method
Feynman-α
method
Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1391.13 ± 7.52
1373.04 ± 3.26
4.38045 ± 0.03693
5.64980 ± 0.07543
Fiber #2 1923.49 ± 17.25 1716.23 ± 6.16 14.51611 ± 0.28260 22.32025 ± 0.61495
Fiber #3 1702.94 ± 13.19 1472.83 ± 6.22 13.26441 ± 0.20715 23.86036 ± 0.50561
BF-3 #1 1207.87 ± 10.66 1126.86 ± 7.24
3.42911 ± 0.04326
5.05718 ± 0.09525
BF-3 #2 1330.03 ± 9.58
1243.59 ± 6.73
4.43292 ± 0.05867
6.80633 ± 0.12576
BF-3 #3 1174.22 ± 9.88
1065.23 ± 6.45
3.42483 ± 0.04214
4.81459 ± 0.08743
Table A4.47 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-F-3 (FFAG acc.) (ρ pcm, MCNP = 4216.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
Fiber #1 1510.24 ± 8.97 1496.27 ± 3.55
4.72259 ± 0.03967 5.79531 ± 0.08473
Fiber #2 2057.82 ± 19.03 1864.81 ± 7.14
15.98057 ± 0.31846 24.43068 ± 0.71408
Fiber #3 1869.31 ± 13.40 1603.28 ± 7.06
14.01938 ± 0.22056 26.06993 ± 0.56158
BF-3 #1 1289.31 ± 9.06 1187.38 ± 4.89
3.67468 ± 0.03501 5.55305 ± 0.08255
BF-3 #2 1446.93 ± 8.78 1349.98 ± 4.44
4.94667 ± 0.05298 7.56721 ± 0.11849
BF-3 #3 1297.96 ± 8.56 1163.16 ± 5.11
3.61958 ± 0.03220 5.43031 ± 0.07652