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Experimental Analyses of 243Am and 235U Fission Reaction Rates at Kyoto University Critical Assembly
Nuclear Science and Engineering ( IF 1.2 ) Pub Date : 2021-07-29 , DOI: 10.1080/00295639.2021.1932220
Cheol Ho Pyeon 1 , Akito Oizumi 2 , Masahiro Fukushima 2
Affiliation  

Abstract

Measurements of 243Am and 235U fission reaction rates are conducted with the use of two single fission chambers in the solid-moderated and solid-reflected core at the Kyoto University Critical Assembly (KUCA). Critical irradiation experiments of 243Am and 235U foils are carried out, and the measured result of 243Am/235U is 0.0424 ± 0.0019; also, calculation/experiment values between calculated (MCNP6.1 with JENDL-4.0, ENDF/B-VIII.0, and JEFF-3.3) and measured results of 243Am/235U range among 0.93 ± 0.04, 0.94 ± 0.04, and 0.93 ± 0.04, respectively. Through a comparison between the measured and calculated results, the 243Am fission cross-section data of the three major nuclear data libraries are successfully validated, demonstrating the same accuracy as that of previous minor actinide irradiation experiments at KUCA. Importantly, the comparison also provides the complemental data of integral experiments of 243Am fission reaction rates that confirm the accuracy of the 243Am fission cross-section data.



中文翻译:

京都大学临界装配243Am和235U裂变反应速率的实验分析

摘要

243 Am 和235 U 裂变反应速率的测量是在京都大学关键组件 (KUCA) 的固体慢化和固体反射核心中使用两个单裂变室进行的。的临界辐照实验243 Am和235个ü箔进行,并且所测量的结果243的AM / 235 U是0.0424±0.0019; 此外,计算(MCNP6.1 与 JENDL-4.0、ENDF/B-VIII.0 和 JEFF-3.3)和243 Am/ 235 U 的测量结果之间的计算/实验值介于0.93 ± 0.04、0.94 ± 0.04 和分别为 0.93 ± 0.04。通过比较实测结果和计算结果,成功验证了三个主要核数据库的243 Am 裂变截面数据,证明与之前在 KUCA 进行的小锕系元素辐照实验具有相同的准确性。重要的是,该比较还提供了243 Am 裂变反应速率积分实验的补充数据,证实了243 Am 裂变截面数据的准确性。

更新日期:2021-10-01
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