326
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.14 List of core condition in all the cores shown in Fig. A4.6e (Ref. [1])
Case
# of fuel plates Rod insertion
(down)
100 MeV protons
Repetition (Hz) Width (ns) Current (nA)
Case 5-F-1 2280
C1~S6 up
30
100
0.3
Case 5-F-2 2280
C1
30
100
0.3
Case 5-F-3 2280
C1, C2
30
100
0.3
Case 5-F-4 2280
C1, C2, A3
30
100
0.3
Case 5-F-5 2280
C1~S6, CC
30
100
0.3
CC: Center core
Transient steps: All C1~S6 up (stable) → C1 drop → C2 drop → A3 drop → CC drop
A4.3 Kinetic Parameters
A4.3.1 ADS with 14 MeV Neutrons
See (Tables A4.15, A4.16, A4.17, A4.18, A4.19, A4.20, A4.21, A4.22, A4.23, A4.24,
A4.25, A4.26, A4.27, A4.28, A4.29, A4.30, A4.31, A4.32, A4.33 and A4.34).
Table A4.15 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 1-D-1 (DT acc.) (ρ pcm, exp = 1245.0 ± 41.7 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 717.63 ± 12.28 650.92 ± 55.23
1.50189 ± 0.02694 1.79660 ± 0.04535
BF-3 #2 710.94 ± 13.02 729.76 ± 60.58
1.56681 ± 0.02954 1.76655 ± 0.04770
BF-3 #3 709.12 ± 4.96
725.23 ± 50.43
1.54026 ± 0.01131 1.62362 ± 0.01756
BF-3 #4 739.00 ± 23.75 1226.41 ± 53.52
2.36997 ± 0.03507 1.50892 ± 0.05004
Fiber #1 713.88 ± 23.23 –
1.42923 ± 0.04583 1.35279 ± 0.06973
Fiber #2 733.90 ± 11.74 –
1.38885 ± 0.02078 1.47719 ± 0.03464
Fiber #3 711.48 ± 11.43 –
1.56890 ± 0.02685 1.75388 ± 0.04286
Table A4.16 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods (Ref. [1])
Case 1-D-2 (Am-Be) (ρ pcm, exp =1245.0 ± 41.7 [pcm])
Detector
PNS method
Feynman-α method
BF-3 #1
–
745.76 ± 154.62
BF-3 #2
–
1051.355 ± 265.21
BF-3 #3
787.35 ± 68.45
604.28 ± 27.36
BF-3 #4
–
1057.10 ± 245.31
Fiber #1
–
865.09 ± 1492.43
Fiber #2
–
1179.31 ± 288.01
Fiber #3
–
645.96 ± 113.23
Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
Table A4.14 List of core condition in all the cores shown in Fig. A4.6e (Ref. [1])
Case
# of fuel plates Rod insertion
(down)
100 MeV protons
Repetition (Hz) Width (ns) Current (nA)
Case 5-F-1 2280
C1~S6 up
30
100
0.3
Case 5-F-2 2280
C1
30
100
0.3
Case 5-F-3 2280
C1, C2
30
100
0.3
Case 5-F-4 2280
C1, C2, A3
30
100
0.3
Case 5-F-5 2280
C1~S6, CC
30
100
0.3
CC: Center core
Transient steps: All C1~S6 up (stable) → C1 drop → C2 drop → A3 drop → CC drop
A4.3 Kinetic Parameters
A4.3.1 ADS with 14 MeV Neutrons
See (Tables A4.15, A4.16, A4.17, A4.18, A4.19, A4.20, A4.21, A4.22, A4.23, A4.24,
A4.25, A4.26, A4.27, A4.28, A4.29, A4.30, A4.31, A4.32, A4.33 and A4.34).
Table A4.15 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods and subcriticality [$] in dollar units (Ref. [1])
Case 1-D-1 (DT acc.) (ρ pcm, exp = 1245.0 ± 41.7 [pcm])
Detector PNS method
Feynman-α method Area ρ $ [$]
Extended area ρ $ [$]
BF-3 #1 717.63 ± 12.28 650.92 ± 55.23
1.50189 ± 0.02694 1.79660 ± 0.04535
BF-3 #2 710.94 ± 13.02 729.76 ± 60.58
1.56681 ± 0.02954 1.76655 ± 0.04770
BF-3 #3 709.12 ± 4.96
725.23 ± 50.43
1.54026 ± 0.01131 1.62362 ± 0.01756
BF-3 #4 739.00 ± 23.75 1226.41 ± 53.52
2.36997 ± 0.03507 1.50892 ± 0.05004
Fiber #1 713.88 ± 23.23 –
1.42923 ± 0.04583 1.35279 ± 0.06973
Fiber #2 733.90 ± 11.74 –
1.38885 ± 0.02078 1.47719 ± 0.03464
Fiber #3 711.48 ± 11.43 –
1.56890 ± 0.02685 1.75388 ± 0.04286
Table A4.16 Measured prompt neutron decay constants α [s −1 ] deduced by PNS and Feynman-α
methods (Ref. [1])
Case 1-D-2 (Am-Be) (ρ pcm, exp =1245.0 ± 41.7 [pcm])
Detector
PNS method
Feynman-α method
BF-3 #1
–
745.76 ± 154.62
BF-3 #2
–
1051.355 ± 265.21
BF-3 #3
787.35 ± 68.45
604.28 ± 27.36
BF-3 #4
–
1057.10 ± 245.31
Fiber #1
–
865.09 ± 1492.43
Fiber #2
–
1179.31 ± 288.01
Fiber #3
–
645.96 ± 113.23