ANS 8.1-2014（R2018）适用于在核反应堆外使用裂变材料的操作，但在受控条件下组装这些材料的操作除外，例如关键实验。给出了广义基本准则，并对一些简单形状的可裂变单元（包含233U、235U或239PU）规定了极限，但对多单元阵列则没有规定。某些多单元阵列的亚临界限值包含在SI/ANS-8.7-1998（R2012）中。关键词:核临界安全、核设施运行、辐射、核安全

ANS 8.1-2014 (R2018) is applicable to operations with fissionable materials outside nuclear reactors, except for the assembly of these materials under controlled conditions, such as critical experiments. Generalized basic criteria are presented, and limits are specified for some single fissionable units of simple shape containing233U,235U, or239Pu, but not for multiunit arrays. Subcritical limits for certain multiunit arrays are contained inANSI/ANS-8.7-1998 (R2012).Keywords:nuclear criticality safety, nuclear facility operations, radiological, nuclear safety