Document: NUREG-0800
Document ID: 7916b088-fb90-4163-84fe-027bd315bcc5
Document Type: srp
Title: REVIEW OF RISK INFORMATION USED TO SUPPORT PERMANENT PLANT-
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700658.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.2
CFR Part: 
CFR Title: 

Content:
the environment relative to the initiation of core melt and relative to the time for vessel rupture? LEVEL 3 (CONSEQUENCE ANALYSIS) • Does the application necessitate detailed evacuee doses? • Are individual doses at specific locations needed for this application? • Is evacuation or sheltering being considered as a mitigation measure? • Are long-term doses a consideration in this application? 19.2-32 June 2007 Table III-1 (page 5 of 5) Questions to Assist in Establishing the Cause-Effect Relationship EXTERNAL EVENTS PRA • Does the application introduce external hazards not previously evaluated? • Does the application increase the intensity of existing hazards significantly? • Are design changes modifying the structural response of the plant being considered? • Does the change impact the availability and performance of necessary mitigation systems for an external hazard? • Does the application significantly modify the inputs to the plant model conditioned on the external event? • Are changes being requested for systems designed to mitigate against specific external events? • Does the application involve availability and performance of containment systems under the external hazard? LOW POWER and SHUTDOWN PRA • Does the application introduce new initiating events or change the frequencies of existing events? • Does the application affect the scheduling of outage activities? • Does the application affect the ability of the operator to respond to shutdown events? • Does the application affect the reliability or availability of equipment used for shutdown conditions? • Does the application affect the availability of equipment or instrumentation used for contingency plans? • Does the application affect the ability for the operator to close containment? 19.2-33 June 2007 Note: The analysis will be subject to increased technical review and management attention as indicated by the darkness of the shading of the figure. In the context of the