ASME ASME/ANS RA-S-1.3-2025

This Standard sets forth requirements for the consequence analysis portion of probabilistic risk assessments (PRAs) used to support risk-informed decisions for accidents involving the release of radioactive materials into the atmosphere. It is expected that the primary use of this Standard would be in support of nuclear power plants, including small modular reactors (SMR), although it could support broader applications. In these cases, supplemental requirements may be needed to ensure technical adequacy. This portion of a PRA is typically known as a Level 3 analysis.