ENDF/B-Ⅶ.0多群截面库MUSE1.0在压力容器基准实验分析中的初步应用

Preliminary Analysis of RPV Benchmark for PWR With MUSE1.0 ENDF/B-Ⅶ.0 Multi-group Library

摘要: 基于ENDF/B-Ⅶ.0评价核数据库开发了172n×42g多群截面数据库MUSE1.0，利用二维离散纵标法程序DORT，针对美国H．B．Robinson-2号机组压力容器基准实验，对辐照监督管处中子能谱、核反应率及比活度等参数进行了详细的计算分析，并与基于ENDF/B-Ⅵ的BUGLE-96多群参数库计算结果及实验测量值进行了比较分析。结果表明：MUSE1.0比活度计算值与实验测量值之比（C/M）平均为0.98±0.04，较BUGLE-96计算结果（平均C/M为0.90±0.04）精度有较大提高，满足压水堆压力容器快中子注量计算精度要求。

Abstract: Multigroup library MUSE1.0 based on the ENDF/B-Ⅶ.0 was developed. The key responses, such as neutron spectrum, reaction rate and specific activity of the surveillance capsule benchmark of H.B. Robinson unit-2 in the USA were calculated by the two-dimensional discrete-ordinates code DORT. The results were compared with those calculated by the BUGLE-96 cross section library which was based on ENDF/B-Ⅵ. The average ratio of calculated-to-measured (C/M) specific activities with MUSE1.0 is 0.98±0.04, which is more accurate than the value of 0.90±0.04 with BUGLE-96. The result indicates that MUSE1.0 satisfies the accuracy requirement of fast neutron fluence calculation for RPV of PWR.