ANSI/ANS-8.7-1975;R1982;R1987;W1997 (R=Reaffirmed, W=Withdrawn): Guide for Nuclear Criticality Safety in the Storage of Fissile Materials

This Guide 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.