The safety of Pajarito Site critical assembly operations depends upon protection built into the facility, upon knowledgeable personnel, and upon good practice as defined by operating procedures and experimental plans. Distance, supplemented by shielding in some cases, would protect personnel against an extreme accident generating 1019 fissions. During the facility's 28-year history, the direct cost of criticality accidents has translated to a risk of less than $200 per year.--P. 1.

This document is to satisfy the requirement for technical specifications spelled out in ERDA Manual Chapter 0540, ''Safety of ERDA-Owned Reactors.'' Technical specifications are defined in Sec. 0540-048, and the requirement for them appears in Sec. 0540-015. The following technical specifications replace the document, ''Operating Limits for the Los Alamos Critical Assembly Facility,'' revised May 27, 1971. (auth).