High Power Laser and Particle Beams, Volume. 34, Issue 5, 056005(2022)
Preliminary application of neutronics calculation in LFR reactor with metallic fuel using dragon code
Figures & Tables(13)
Fig. 3. Calculation models for assembly group constant computation
Fig. 5. Neutron spectrum of UZr fuel in a fuel assembly using Dragon or RMC code
Table 1. Designed dimensions of fuel, radial reflector and control rod assemblies (293 K)
View tableView in ArticleTable 1. Designed dimensions of fuel, radial reflector and control rod assemblies (293 K)
item number of rods in assembly Hexcan outer flat-to-flat size/mm Hexcan wall thickness/mm pin pitch/mm pin cladding inner diameter/mm pin cladding outer diameter/mm pin cladding thickness/mm fuel assembly 271 173 4.5 9.80 7.37 8.500 0.565 radial reflector assembly 91 173 4.5 16.90 — 15.838 — CR assembly 31 173 4.5 22.77 18.00 19.000 0.500 item pin cladding outer diameter, including wrap wires/mm fuel pellet outer diameter/mm fuel pellet inner hole diameter/mm absorber pellet diameter/mm rod body outer diameter of CR assembly/mm rod body wall thickness of CR assembly/mm assembly (section) axial length/m fuel assembly 8.584 7.37 4.944 — — — upper reflector section: 0.5 gas chamber section: 1.1 fuel pellet section: 0.9 lower reflector section: 0.5 radial reflector assembly — — — — — — 3.0 CR assembly — — — 17 149 2 absorber pellet section:1.0 lower reflector section: 0.5 LBE section: 1.5
Table 2. 24 group energy structure for condensation
View tableView in ArticleTable 2. 24 group energy structure for condensation
group number upper energy limit of 172-group lib/eV upper energy limit of 295-group lib/eV 1 19.6400×106 19.6400×106 2 10.0000×106 10.0000×106 3 6.0653×106 6.0653×106 4 3.0119×106 3.3287×106 5 2.0190×106 1.9014×106 6 1.2246×106 1.2870×106 7 8.2085×105 8.6001×105 8 4.9787×105 4.9400×105 9 3.0197×105 3.2065×105 10 1.2277×105 1.6506×105 11 1.1109×105 1.1562×105 12 6.7379×104 6.7379×104 13 3.6979×104 3.6979×104 14 1.6616×104 2.2699×104 15 1.5034×104 1.4900×104 16 9.1188×103 9.1188×103 17 5.0045×103 5.0045×103 18 3.3546×103 3.4811×103 19 1.5073×103 1.8118×103 20 1.2341×103 1.1347×103 21 6.7729×102 6.7729×102 22 3.7170×102 4.1909×102 23 3.0432×102 2.9592×102 24 1.3674×102 1.4666×102 lower energy limit/eV 1.0000×10−5
Table 3. Calculation results of
k inf in an LFR fuel assemblyView tableView in ArticleTable 3. Calculation results of
k inf in an LFR fuel assemblysolution kinf difference with RMC/10−5 UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly RMC code 1.33254 1.35197 1.23743 — — — Dragon code (172-group lib) 1.31722 1.33137 1.22903 −873 −1144 −552 Dragon code (295-group lib) 1.31272 1.32382 1.22524 −1133 −1573 −804
Table 4. Calculation results of coolant density effect in an LFR fuel assembly
View tableView in ArticleTable 4. Calculation results of coolant density effect in an LFR fuel assembly
solution reactivity change of coolant density effect, ΔρLBE/10−5 relative difference/% UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly RMC code 265 383 214 — — — Dragon code (172-group lib) 247 374 224 −6.8 −2.3 4.7 Dragon code (295-group lib) 248 375 223 −6.4 −2.1 4.2
Table 5. Calculation results of fuel Doppler coefficient in an LFR fuel assembly
View tableView in ArticleTable 5. Calculation results of fuel Doppler coefficient in an LFR fuel assembly
solution fuel Doppler coefficient, kD/10−5 relative difference/% UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly UZr fuel assembly UPuZr fuel assembly UO2 fuel assembly RMC code −297 −380 −743 — — — Dragon code (172-group lib) −280 −359 −715 −5.7 −5.5 −3.8 Dragon code (295-group lib) −300 −378 −725 1.0 −0.5 −2.4
Table 6.
k effand its discrepancy of a LFR core using Dragon/Donjon code (293 K) View tableView in ArticleTable 6.
k effand its discrepancy of a LFR core using Dragon/Donjon code (293 K) solution keff difference with RMC/10−5 LFR core with UZr fuel LFR core with UPuZr fuel LFR core with UZr fuel LFR core with UPuZr fuel RMC code 1.02934 1.03132 — — 172-group lib MCFD 1.04436 1.03005 1398 −120 SP3 1.03517 1.01923 548 −1151 295-group lib MCFD 1.04139 1.02432 1124 −663 SP3 1.03102 1.01247 159 −1805
Table 7. Discrepancy of control rod worth of an LFR core using Dragon/Donjon code
View tableView in ArticleTable 7. Discrepancy of control rod worth of an LFR core using Dragon/Donjon code
solution CR worth/10−5 relative difference/% LFR core with UZr fuel LFR core with UPuZr fuel LFR core with UZr fuel LFR core with UPuZr fuel RMC code −10570 −10022 — — 172-group lib MCFD −10459 −10250 −1.1 2.3 SP3 −11056 −10787 4.6 7.6 295-group lib MCFD −10405 −10235 −1.6 2.1 SP3 −10985 −10743 3.9 7.2
Table 8. Discrepancy of fuel assembly power of an LFR core using Dragon/Donjon code (D/R-1)
View tableView in ArticleTable 8. Discrepancy of fuel assembly power of an LFR core using Dragon/Donjon code (D/R-1)
XS library method relative difference of LFR core with UZr fuel/% relative difference of LFR core with UPuZr fuel/% Max Min RMS Max Min RMS CR-P and CR-S withdrawn 172-group lib MCFD 1.6 −4.4 1.7 1.7 −4.8 1.9 SP3 5.5 −1.5 1.8 3.9 −1.3 1.4 295-group lib MCFD 3.0 −8.9 3.7 2.7 −8.3 3.4 SP3 1.4 −3.9 1.4 1.3 −3.7 1.3 CR-P at critical location; CR-S withdrawn 172-group lib MCFD 3.2 −5.4 2.3 3.1 −5.9 2.4 SP3 5.1 −1.7 1.7 3.9 −1.9 1.3 295-group lib MCFD 4.7 −9.9 4.3 4.3 −9.2 4.0 SP3 2.2 −4.7 1.9 2.1 −4.9 1.8
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Liang Zhang, Sheng Sun, Shouhua Sun, Wenhua Yang. Preliminary application of neutronics calculation in LFR reactor with metallic fuel using dragon code[J]. High Power Laser and Particle Beams, 2022, 34(5): 056005
Paper Information
Category: Feature Issue on Application Technology of Research Reactor
Received: Jan. 4, 2022
Accepted: --
Published Online: Jun. 2, 2022
The Author Email: Shouhua Sun (1319049712@qq.com)
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