NUREG-1765, Basis Document for Large Early Release Frequency (LERF) Significance Determination Process (SDP) Inspection Findings that May Affect LERF

A significance determination process (SDP) is proposed that assigns risk characterization to inspection findings based on large early release frequency (LERF) considerations. This process is designed to interface directly with the SDP that is based on findings related to those structures, systems, and components (SSCs) that can influence the core damage frequency (CDF). The proposed LERF-based SDP will capture findings for those SSCs that can influence CDF determinations but which can also influence LERF. In addition, the proposed LERF-based SDP approach will address findings related to SSCs that do not influence CDF determinations but which can impact the containment function.