Document: NUREG-0800
Document ID: e32f0820-4e33-476e-aa36-4ca8c2c64af0
Document Type: srp
Title: Use of Probabilistic Risk Assessment in Plant-Specific, Risk-Informed Decisionmaking:
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0119/ML011940192.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
CFR Part: 
CFR Title: 

Content:
port regulatory decisionmaking are clearly documented and available for public review. Definition of the Proposed Change Adequate traditional engineering and probabilistic evaluations are available to support the proposed LB change. Plant-specific and relevant industry data and operational experience also support the proposed change. Cause-effect relationships have been identified to adequately link the application with the evaluatior, models, and the proposed models can effectively evaluate or realistically bound the effects of the proposed change. Information from engineering analyses, operational experience, plant-specific performance history have been factored into the decisionmaking process. Evaluations of Defense-In-Depth Attributes and Safety Margqins Defense-in-depth is preserved (for example, system redundancy, diversity, and independence are maintained commensurate with the expected frequency and consequence of challenges to the system; defenses against potential common cause failures are maintained and the introduction of new common cause failure mechanisms is assessed; and defenses against human errors are maintained). Sufficient safety margins are maintained (for example, NRC-approved codes and standards are met or deviations justified; and safety analysis acceptance criteria in SRP 19-36 the LB are met, or proposed revisions provide sufficient margin to account for analysis and data uncertainty). * Current regulations have been met, or the proposed exemption is acceptable. Scope of Risk Analysis * The licensee's risk analysis satisfactorily addresses all mode/initiator combinations, or The licensee's risk analysis does not analyze all mode/initiator type combinations. However, in each instance, the licensee has demonstrated that suitably redundant and diverse plant response capability is maintained for significant initiators in these modes, and sufficient elements of the plant response capability are subject to programmatic activities to ensure