330
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.26 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-D-5 (DT acc.) (ρ pcm, MCNP = 3111.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1070.93 ± 14.87
981.40 ± 17.98
3.48096 ± 0.08413 4.87113 ± 0.15607
BF-3 #2 1041.43 ± 13.38
972.84 ± 16.43
3.79819 ± 0.09405 5.40366 ± 0.16873
BF-3 #3 1067.21 ± 7.71
995.28 ± 12.30
3.76012 ± 0.03970 4.45491 ± 0.06704
Fiber #1 1061.98 ± 27.72 1028.16 ± 34.83
3.77311 ± 0.16272 4.36965 ± 0.26057
Fiber #2 1059.13 ± 10.74 1003.92 ± 13.44
3.54025 ± 0.05283 4.27714 ± 0.09088
Fiber #4 1053.99 ± 17.86
970.70 ± 19.62
3.57903 ± 0.09639 4.81026 ± 0.17481
Table A4.27 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 5-D-1 (DT acc.) (ρ pcm, MCNP = 5466.8 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1507.29 ± 45.15 1600.24 ± 58.30
13.12317 ± 1.02054 13.12317 ± 1.02054
BF-3 #2 –
–
–
–
BF-3 #3 1561.24 ± 16.71 1521.88 ± 11.71
8.04806 ± 0.22314 8.04806 ± 0.22314
Fiber #1 –
–
–
–
Fiber #2 1562.66 ± 25.08 1487.91 ± 22.39
6.74084 ± 0.20170 9.57870 ± 0.41788
Fiber #4 1567.86 ± 41.67 1597.84 ± 77.17
–
–
Table A4.28 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 5-D-2 (DT acc.) (ρ pcm, MCNP = 5466.8 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1542.47 ± 32.10 1531.57 ± 94.15
6.69272 ± 0.26248
9.85874 ± 0.53993
BF-3 #2 1541.73 ± 37.74 1542.69 ± 104.74
7.09606 ± 0.31803
9.58566 ± 0.61002
BF-3 #3 1561.45 ± 12.48 1487.83 ± 19.03
7.12148 ± 0.11291
8.31547 ± 0.18855
Fiber #1 1559.87 ± 70.36 2076.12 ± 339.59
7.68274 ± 0.66021
7.74516 ± 0.96734
Fiber #2 1558.73 ± 18.72 1436.66 ± 39.58
6.44406 ± 0.15399
9.05447 ± 0.30220
Fiber #4 1569.88 ± 36.43 1308.68 ± 110.11
7.70664 ± 0.42332 10.96118 ± 0.77941
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.26 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 4-D-5 (DT acc.) (ρ pcm, MCNP = 3111.6 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1070.93 ± 14.87
981.40 ± 17.98
3.48096 ± 0.08413 4.87113 ± 0.15607
BF-3 #2 1041.43 ± 13.38
972.84 ± 16.43
3.79819 ± 0.09405 5.40366 ± 0.16873
BF-3 #3 1067.21 ± 7.71
995.28 ± 12.30
3.76012 ± 0.03970 4.45491 ± 0.06704
Fiber #1 1061.98 ± 27.72 1028.16 ± 34.83
3.77311 ± 0.16272 4.36965 ± 0.26057
Fiber #2 1059.13 ± 10.74 1003.92 ± 13.44
3.54025 ± 0.05283 4.27714 ± 0.09088
Fiber #4 1053.99 ± 17.86
970.70 ± 19.62
3.57903 ± 0.09639 4.81026 ± 0.17481
Table A4.27 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 5-D-1 (DT acc.) (ρ pcm, MCNP = 5466.8 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1507.29 ± 45.15 1600.24 ± 58.30
13.12317 ± 1.02054 13.12317 ± 1.02054
BF-3 #2 –
–
–
–
BF-3 #3 1561.24 ± 16.71 1521.88 ± 11.71
8.04806 ± 0.22314 8.04806 ± 0.22314
Fiber #1 –
–
–
–
Fiber #2 1562.66 ± 25.08 1487.91 ± 22.39
6.74084 ± 0.20170 9.57870 ± 0.41788
Fiber #4 1567.86 ± 41.67 1597.84 ± 77.17
–
–
Table A4.28 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 5-D-2 (DT acc.) (ρ pcm, MCNP = 5466.8 ± 5.8 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 1542.47 ± 32.10 1531.57 ± 94.15
6.69272 ± 0.26248
9.85874 ± 0.53993
BF-3 #2 1541.73 ± 37.74 1542.69 ± 104.74
7.09606 ± 0.31803
9.58566 ± 0.61002
BF-3 #3 1561.45 ± 12.48 1487.83 ± 19.03
7.12148 ± 0.11291
8.31547 ± 0.18855
Fiber #1 1559.87 ± 70.36 2076.12 ± 339.59
7.68274 ± 0.66021
7.74516 ± 0.96734
Fiber #2 1558.73 ± 18.72 1436.66 ± 39.58
6.44406 ± 0.15399
9.05447 ± 0.30220
Fiber #4 1569.88 ± 36.43 1308.68 ± 110.11
7.70664 ± 0.42332 10.96118 ± 0.77941