Journal Article Lead Benchmark Experiment with DT Neutrons at JAEA/FNS

権, セロム  ,  太田, 雅之  ,  佐藤, 聡  ,  今野, 力  ,  落合, 謙太郎

72 ( 3 )  , pp.362 - 367 , 2017-09 , IOP Publishing
ISSN:1943-7641
Description
A new benchmark experiment on lead with DT neutrons was designed and carried out with a large lead assembly covered with Li2O blocks at JAEA/FNS to validate nuclear data of lead for measurement of reaction rates without impact of background neutrons. The experiment was analyzed by using theMCNP5-1.40 code with the latest nuclear data libraries, ENDF/B-VII.1, JEFF-3.2 and JENDL-4.0. The calculated reaction rates underestimated the measured ones with the depth. Moreover, the tendencies of C/Es were different among the nuclear data libraries. In order to find out the reasons of the differences, weexamined reaction cross-sections of lead in the nuclear data libraries in detail. The potential reactions to cause the underestimation issue of the calculated reaction rates were indicated through this study.

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