Document: NUREG-0800
Document ID: ac43f632-9db1-4857-9f56-bfba45965456
Document Type: srp
Title: * These are modifications to a plant’s design, operations, or other activities that require NRC approval. These modifica
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0232/ML023250195.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19
CFR Part: 
CFR Title: 

Content:
el 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? 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? SRP 19-33 Figure III-1 Acceptance Guidelines* for Core Damage Frequency (CDF) Figure III-2 Acceptance Guidelines* for Large Early Release Frequency (LERF) * 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 integrated decisionmaking, the boundaries between the regions should not be interpreted as being definitive; the numerical values associated with