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Oral presentation

Benchmark tests of latest nuclear data libraries for A-FNS shielding design

Kwon, Saerom*; Konno, Chikara; Ota, Masayuki*; Sato, Satoshi*

no journal, , 

The nuclear data library used in A-FNS shielding design was revised recently. In order to validate the latest nuclear data libraries for A-FNS shielding design, we performed benchmark tests of them by using the iron and concrete shielding experiments at QST/TIARA. The results lead to accuracy improvement in A-FNS shielding design.

Oral presentation

Impact of $$^{9}$$Be thermal scattering law data considering crystallite size, 2; Effect on nuclear properties of A-FNS test modules

Kwon, Saerom*; Konno, Chikara; Ota, Masayuki*; Sato, Satoshi*

no journal, , 

The analyses of the beryllium benchmark experiment at JAEA/FNS and the test modules of a fusion neutron source A-FNS were performed with the thermal scattering law data of $$^{9}$$Be considering the crystallite size of beryllium produced by the European Spallation Source group. It was concluded that the overestimation of the calculated reaction rates sensitive to low energy neutrons in the beryllium benchmark experiment at JAEA/FNS decreased with increasing the crystallite size of beryllium. The effect of the $$^{9}$$Be thermal scattering law data appeared for neutron flux below 0.1 eV in the test modules of A-FNS but the effect on tritium production rate, etc. was small because the neutron flux below 0.1 eV was small.

Oral presentation

Present status of nuclear data for fusion neutron source; Validation study on recent beryllium nuclear data

Kwon, Saerom*; Konno, Chikara; Honda, Shogo*; Kenjo, Shunsuke*; Ochiai, Kentaro*; Sato, Satoshi*

no journal, , 

Nuclear data determine accuracy of nuclear analyses for a fusion neutron A-FNS. We analyzed JAEA/FNS beryllium experiment with the latest nuclear data libraries and clarified effects of different secondary neutron spectra of Be-9 among the nuclear data libraries and those of reaction rates sensitive to low energy neutrons due to Be-9 thermal neutron scattering law data with different crystallite domain sizes. This study will lead to accurate nuclear analyses, which contributes to engineering designs for A-FNS.

Oral presentation

Residual tritium amount estimation in the components and pipes of lithium target system for A-FNS after its operation

Oyaizu, Makoto*; Ochiai, Kentaro*; Hirakawa, Yasushi; Furukawa, Tomohiro; Masuda, Kai*

no journal, , 

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