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Working Groups

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ANS-58.24, Severe Accident Progression and Radiological Release (Level 2) PRA Methodology to Support Nuclear Installation Applications

Scope: This standard provides criteria and acceptable methods for the evaluation of containment performance and radiological releases to the environment. The radiological releases considered result from postulated accidents that cause fuel damage and are used in risk-informed applications requiring Level 2 probabilistic risk assessment (PRA). The standard addresses sequences initiated by internal or external events during full power operation.

ANS-58.25, Standard for Radiological Accident Offsite Consequence Analysis (Level 3 PRA) to Support Nuclear Installation Applications

Scope: This standard provides requirements for application of risk-informed decisions related to the consequences of accidents involving release of radioactive materials to the environment. The consequences to be addressed include health effects (early and late) and longer term environmental impacts. The required capabilities allow determination of the efficacy of mitigation strategies on reducing consequences.
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