Active standard | Published: 20/04/2026

ASME ANSRA-S-1.1:2024

Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications

Available languages: English

Available design: electronic (protected pdf), Print design

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Detail information

Designation: ASME ANSRA-S-1.1:2024

Publication date: 20/04/2026

Pages: 401

Country: American technical standard

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Anotation

This nuclear standard states requirements for a Level 1 Probabilistic Risk Assessment (PRA) of internal and external hazards while at-power for the evaluation of core damage frequency (CDF). In addition, this standard states requirements for a limited Level 2 PRA sufficient to evaluate large early release frequency (LERF). The only hazards explicitly excluded from the scope are accidents resulting from purposeful human-induced security threats (e.g., sabotage, terrorism). These requirements are written for operating light water reactor (LWR) nuclear power plants. This standard may be used for LWR plants under design or construction or for advanced LWRs, such as small modular reactors (SMR), but revised or additional requirements may be needed. See more

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