蒙卡程序计算临界基准题测试检验ENDF/B-VIII.0核数据库

刘晓波; 胡泽华

doi:10.11884/HPLPB202234.210366

蒙卡程序计算临界基准题测试检验ENDF/B-VIII.0核数据库

doi: 10.11884/HPLPB202234.210366

刘晓波^1,,
胡泽华²

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

详细信息

作者简介:
刘晓波，13881190590@163.com

中图分类号: TL329
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- 被引次数: 0
出版历程
- 收稿日期: 2021-08-25
- 修回日期: 2021-12-26
- 网络出版日期: 2022-01-06
- 刊出日期: 2022-01-11

Monte Carlo calculation of critical benchmarking models for testing ENDF/B-VIII.0 nuclear data

Liu Xiaobo^1
,,
Hu Zehua²

1.
Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900 China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

摘要

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²³³U、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k_eff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k_eff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。
- 蒙卡程序 /
- 临界基准题 /
- 核数据 /
- ENDF/B-VIII.0 /
- 测试检验
Abstract: 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 ²³³U, 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 k_eff and the benchmarking k_eff were −68.98×10⁻⁵ and 407.88×10⁻⁵respectively, 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.
- Monte Carlo program /
- critical benchmarking models /
- nuclear data /
- ENDF/B-VIII.0 /
- testing and verification

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图 1 相对偏差r_i的分布图

Figure 1. Distribution pattern of relative deviation r_i

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图 2 偏差与不确定度比值R_i的分布图

Figure 2. Distribution pattern of the ratio of the devitaion to uncertainty R_i

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表 1 基准模型的分类构成

Table 1. Categorization of the benchmarks in the expanded criticality validation suite

fuel type	number of benchmarks
fuel type	fast	intermediate	thermal	total
²³³U	10	1	7	18
HEU	29	5	6	40
IEU	10	1	6	17
LEU	0	0	8	8
Pu	21	1	14	36
total	70	8	41	119

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表 2 相对偏差r_i的统计特征量比较

Table 2. Comparison of the statistics values for relative deviation r_i

nuclear data	statistical value of r_i/10⁻⁵
nuclear data	E(r_i)	STD(r_i)	F₂(r_i)
ENDF/B-VII.1	15.45	416.56	38.05
ENDF/B-VIII.0	−68.98	407.88	37.77

下载: 导出CSV

表 3 偏差比R_i的统计特征量比较

Table 3. Comparison of the statistics values for deviation ratio R_i

nuclear data	statistical value of R_i/σ			counts of R_i
nuclear data	E(R_i)	STD(R_i)	F₂(R_i)	≤ 1σ	1σ～3σ	＞3σ
ENDF/B-VII.1	−0.029	1.732	0.158	94	20	5
ENDF/B-VIII.0	−0.272	1.540	0.143	107	9	3

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