Document: NUREG-0800
Document ID: 012102de-40de-45a0-a3dc-8159ee34baa5
Document Type: srp
Title: EVALUATION OF POTENTIAL ACCIDENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0704/ML070460336.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.2.3
CFR Part: 
CFR Title: 

Content:
rnatives to the SRP acceptance criteria provide acceptable methods of compliance with the NRC regulations. 1. Event Probability The identification of design-basis events resulting from the presence of hazardous materials or activities in the vicinity of the plant or plants of specified type (or, for ESP applications not referencing DC, falling within a PPE) is acceptable if all postulated types of accidents are included for which the expected rate of occurrence of potential exposures resulting radiological dose in excess of the 10 CFR 50.34(a)(1) as it relates to the requirements of 10 CFR Part 100 is estimated to exceed the NRC staff objective of an order of magnitude of 10-7 per year. 2.2.3-4 Revision 3 - March 2007 If data are not available to make an accurate estimate of the event probability (see Technical Rationale 2 below), an expected rate of occurrence of potential exposures resulting radiological dose in excess of the 10 CFR 50.34(a)(1) as relates to the requirements of 10 CFR Part 100, by an order of magnitude of 10-6 per year is acceptable if, when combined with reasonable qualitative arguments, the realistic probability can be shown to be lower. 2. Design-Basis Events The effects of design-basis events have been adequately considered, in accordance with 10 CFR 100.20(b), if analyses of the effects of those accidents on the safety-related features of the plant or plants of specified type (or, for ESP applications, falling within a PPE) have been performed and measures have been taken (e.g., hardening, fire protection) to mitigate the consequences of such events. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. Offsite hazards that have the potential to cause onsite accidents leading to the release of significant quantities of radioactive fission products, and thus pose an undue risk of public exposure, should have a