Abstract There is limited validation of MONK using 232Th/233U benchmarks, and existing validation of Monte Carlo codes has generally used older nuclear data libraries. Here we use MONK-9A to systematically study a series of thermal 232Th/233U-based benchmark experiments, taken from the International Criticality Safety Benchmark Evaluation Project handbook and using JEF-2.2 and JEFF-3.1 libraries. We find that 232Th-dominated thermal systems (those moderated with graphite or light water) with limited 233U content show little difference when modelled with JEF-2.2 or JEFF-3.1. However, when there is significant 233U then JEFF-3.1 is found to give considerably better agreement with experiment. There is likely to be little benefit in utilising JEFF-3.1 instead of JEF-2.2 when modelling systems for which the predominant nuclides are 232Th, 235U and 238U. However, for systems containing large fractions of 233U – such as light water breeder reactors operating on a 232Th-233U cycle – it is recommended that JEFF-3.1 is utilised.

中文翻译：

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使用 JEF-2.2 和 JEFF-3.1 库验证用于热 232Th/233U 系统的 Monte Carlo 代码 MONK

摘要 使用 232Th/233U 基准对 MONK 的验证有限，现有的 Monte Carlo 代码验证通常使用较旧的核数据库。在这里，我们使用 MONK-9A 系统地研究了一系列基于 232Th/233U 的热基准实验，这些实验取自国际临界安全基准评估项目手册，并使用 JEF-2.2 和 JEFF-3.1 库。我们发现，当用 JEF-2.2 或 JEFF-3.1 建模时，233U 含量有限的 232Th 主导的热系统（那些用石墨或轻水调节的系统）几乎没有差异。然而，当存在显着的 233U 时，发现 JEFF-3.1 与实验的一致性要好得多。在对主要核素为 232Th、235U 和 238U 的系统进行建模时，使用 JEFF-3.1 代替 JEF-2.2 可能没有什么好处。