Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications (Includes Interpretations Volume 1)
This Standard establishes requirements for a Level 1PRA of internal and external events for all plantoperating modes (low power and shutdown modes willbe included at a future date). In addition, this Standardestablishes requirements for a limited Level 2 PRA sufficientto evaluate large early release frequency (LERF).The only initiating events explicitly excluded from thescope are accidents resulting from purposeful humaninducedsecurity threats (e.g., sabotage). This Standardapplies to PRAs used to support applications of riskinformeddecision-making related to design, licensing,procurement, construction, operation, and maintenance.These requirements are written for operating powerplants. They may be used for plants under design orconstruction, for advanced LWRs, or for other reactordesigns, but revised or additional requirements may beneeded.