Document: NUREG-0800
Document ID: fe8ec6c2-e960-404c-854f-55c77bde1672
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML2400/ML24005A077.pdf
Revision Date: 2024-05
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

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PRA used for the risk-informed D3 assessment, identifies the basis for the technical acceptability of the base PRA (e.g., a specific revision of RG 1.200 or equivalent guidance for new reactors, such as DC/COL-ISG-028), and demonstrates that the base PRA is technically acceptable and reflects the plant or design at the time of the application. BTP 7-19-32 Revision 9 — May 2024 b. The exclusion of any PRA hazard or operating modes from the risk-informed D3 assessment is adequately justified. c. Adequate justification is provided for any changes to the PRA model to support the application (e.g., whether the changes are considered PRA maintenance or a PRA upgrade, based on the corresponding definitions in the revision of RG 1.200 or equivalent guidance for new reactors, such as DC/COL-ISG-028, identified in the application). d. For an application addressing a CCF through detailed modeling of the DI&C system in the PRA, the following conditions are met: i. The DI&C system is modeled in sufficient detail to enable the licensee to evaluate the impact of the CCF on plant equipment and functions modeled in the PRA. ii. The modeling addresses the impact of the CCF on plant equipment in multiple systems if the DI&C system combines functions and addresses the impact of the CCF on the ability of operators to perform manual actions, and iii. Adequate justification is provided to show that the impact of the CCF on plant equipment, functions, and operator actions not modeled in the PRA is not risk significant. e. For an application addressing a CCF using surrogate events, the following conditions are met: i. The surrogate events bound the impact of the CCF on plant equipment, functions, and operator actions modeled in the PRA. ii. Adequate justification is provided to show that the impact of the CCF on plant equipment, functions, and operator actions not modeled in the PRA is not risk significant. f. Key assumptions and sources of uncertainty affecting the application are