Document: NRC Regulatory Guide
Document ID: f0baf50b-5bb7-4783-b2f9-9586e09c97e1
Document Type: regulatory_guide
Title: Preparation of Environmental Reports for Nuclear Power Stations + HISTORY - HISTORY 02/2017 – DG-4026 , Proposed Revision 3 09/2014 – Periodic Review of Revision 2 – Revise (Rev. 3)
Source: NRC Regulatory Guide Division 4
Source URL: https://www.nrc.gov/docs/ML1611/ML16116A068.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-4.2
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Content:
Level 2 PRA being considered in the application, including design-specific PRA information for consideration of potential design improvements under 10 CFR 50.34(f). 13 The applicant should provide the following information to support the NRC staff’s environmental review of SAMAs: • reference for the reactor design and the associated PRA used in the SAMA analysis; 13 NEI 05-01, Revision A, “Severe Accident Mitigation Alternatives (SAMA) Analysis, Guidance Document,” provides a template for completing SAMA analysis in support of reactor license renewal. If applied as a guidance document for new reactor applications, the applicant should justify its use in the ER. DG-4026, Page 110 • list of leading contributors to the reactor design core damage frequency (e.g., from dominant severe accident sequences or initiating events) and site-specific risks (e.g. population dose) for each release class and associated source term for both internal and external events; • methodology, process, and rationale used to identify, screen, and select SAMAs that can reduce severe accident dose consequence risk, considering internal events, fire, flooding, low power and shutdown, and external events; • methodology, process, and rationale used to further analyze any selected SAMAs to determine the amount of risk reduction that the SAMA could reasonably achieve; • estimated cost, risk reduction, and value-impact ratios for the selected SAMAs and the assumptions used to make these estimates; and • description and list of any SAMAs that have been or will be implemented to prevent or mitigate severe accidents or reduce the risk of a severe accident. 5.12 Measures and Controls to Limit Adverse Impacts during Operation Environmental measures and controls may be required during operation to minimize effects to the environment (10 CFR 51.50(a)). The applicant should furnish details of the programs and compliance activities with which it plans to monitor operation activities