蒙卡程序计算临界基准题测试检验ENDF/B-Ⅷ.0核数据库  

Monte Carlo calculation of critical benchmarking models for testing ENDF/B-Ⅷ.0 nuclear data

作　　者：刘晓波[1] 胡泽华[2] Liu Xiaobo;Hu Zehua(Institute of Nuclear Physics and Chemistry,CAEP,Mianyang 621900 China;Institute of Applied Physics and Computational Mathematics,Beijing 100094,China)

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]北京应用物理与计算数学研究所,北京100094

出　　处：《强激光与粒子束》2022年第2期63-67,共5页High Power Laser and Particle Beams

摘　　要：采用MCNP程序和ENDF/B-Ⅶ.1,ENDF/B-Ⅷ.0核数据库,对119个模型构成的临界基准题进行了临界计算测试检验。此临界基准题模型包含;U、高浓铀、中浓铀、低浓铀和钚材料的临界实验系统,中子能量覆盖了快中子、中能中子和热中子能谱。采用ENDF/B-Ⅷ.0核数据库的计算有效增殖因子keff结果与基准实验结果相对偏差的均值和标准差分别为-68.98×10^(-5)和407.88×10^(-5),检验计算keff结果与基准实验结果的偏差与基准实验不确定度比值在1σ(σ为标准不确定度)以内、1σ~3σ区间和大于3σ的数量分别为107,9和3个;将此结果与相同条件下ENDF/B-Ⅶ.1核数据库的计算结果进行了比较,表明ENDF/B-Ⅷ.0核数据库对临界计算更准确,与实验模型结果符合更好。The MCNP program and the ENDF/B-Ⅶ.1, ENDF/B-Ⅷ.0 nuclear data were used to calculate the criticality respect to the critical benchmarking suits of 119 models for nuclear data testing. The benchmarking suits consists of;U, high-enriched uranium, intermediate enriched uranium, low-enriched uranium and Pu critical configurations in fuel type, covering the spectra of fast, intermediate, and thermal neutrons. With ENDF/B-Ⅷ.0 nuclear data, the average and standard deviation of the relative deviation between the calculation keff and the benchmarking keff were -68.98×10^(-5) and 407.88×10^(-5) respectively, and the tallies that the ratio of deviation to experimental uncertainty within 1σ, among 1σ–3σ and beyond 3σ were 107, 9 and 3, respectively. The resultant data were compared to the calculation results with ENDF/B-Ⅶ.1 in the same computation conditions, which indicates that the ENDF/B-Ⅷ.0 nuclear data was more accurate, and more consistent with the benchmarking results for criticality calculation.

关 键 词：蒙卡程序 临界基准题 核数据 ENDF/B-Ⅷ.0 测试检验 

分 类 号：TL329[核科学技术—核技术及应用]