ANS and ANSI have published the following new standard, which is available for purchase in the ANS Store:
ANSI/ANS-8.7-2022, Nuclear Criticality Safety in the Storage of Fissile Materials (revision of ANSI/ANS-8.7-1998 [R2017])
Scope: The standard is applicable to the storage of fissile materials. Mass and spacing limits are tabulated for uranium containing greater than 30 wt% 235U, for 233U, and for plutonium as metals and oxides. Criteria for the range of application of these limits are provided.