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Kwon, Saerom*; Konno, Chikara; Honda, Shogo*; Kenjo, Shunsuke*; Sato, Satoshi*
Fusion Engineering and Design, 223, p.115548_1 - 115548_8, 2026/02
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)In order to evaluate the accuracy of the iron data in the latest nuclear data libraries (FENDL-3.2b, JENDL-5, ENDF/B-VIII.0 and JEFF-3.3) used in the fusion neutron source design, we performed their benchmark tests by using QST/TIARA iron experiment with quasi mono-energy neutrons of 40 and 65 MeV and JAEA/FNS iron experiment with DT neutrons. From the test results, we have found the following issues; (1) The calculation results with FENDL-3.2b underestimate the measured neutron fluxes of the continuous energy range (10-60 MeV) by a factor of 0.6 in the TIARA experiment with 65 MeV neutrons; (2) The calculation results with FENDL-3.2b tend to underestimate the measured neutron flux above 10 MeV by a factor of 0.8 at depth of 70 cm and overestimate the measured ones below 10 keV by a factor of 1.3 up to depth of 40 cm in the FNS experiment. We investigated those issues in detail and clarified their reasons.
Konno, Chikara
no journal, ,
We examined the ACE files of the Fusion Evaluated Nuclear Data Library FENDL-3.2b in detail and found that damage production energy cross section data and proton ACE files had problems. It was pointed out that the damage production energy cross section data above 20 MeV of FENDL-3.2b from JENDL-4.0/HE and those above a few MeV of FENDL-3.2b from JEFF-3.1.1 were too small, which was solved by replacing them with JENDL-5 and JEFF-3.2 in the next FENDL, respectively. It was also proposed to reproduce the proton ACE files of FENDL-3.2b from JENDL/HE-2007 for the next FENDL with the nuclear data processing code NJOY2016 modified for JENDL-5, because the Monte Carlo code MCNP6.2 could not treat secondary neutron production data in the proton ACE files of FENDL-3.2b from JENDL/HE-2007 adequately.
Kwon, Saerom*; Konno, Chikara; Honda, Shogo*; Sato, Satoshi*; Masuda, Kai*
no journal, ,
We examined the accuracy of the iron data in the latest nuclear data libraries (FENDL-3.2b, JENDL-5, ENDF/B-VIII.0 and JEFF-3.3) used in the fusion neutron source design by using QST/TIARA iron experiment with quasi mono-energy neutrons of 40 and 65 MeV and JAEA/FNS iron experiment with DT neutrons. Then we have found the following issues on FENDL-3.2b iron data and specified that the non-elastic, inelastic scattering, (n,2n) reaction and (n,np) reaction data of 
Fe and inelastic scattering data of 
Fe caused the issues.1) The calculation results with FENDL-3.2b underestimate the measured neutron fluxes of the continuous energy range (10-60 MeV) by a factor of 0.6 in the TIARA experiment with 65 MeV neutrons. 2) The calculation results with FENDL-3.2b tend to underestimate the measured neutron flux above 10 MeV by a factor of 0.8 at depth of 70 cm and overestimate the measured ones below 10 keV by a factor of 1.3 up to depth of 40 cm in the FNS experiment.
