Document: NRC Regulatory Guide
Document ID: acab976c-e936-49be-8c59-865767973599
Document Type: regulatory_guide
Title: Guidance for a Technology-Inclusive Content of Application Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light-Water Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2319/ML23194A194.pdf
Revision Date: 2023-09
Chapter: 
Section ID: RG-1.253
CFR Part: 
CFR Title: 

Content:
. Clarification: The second-to-last paragraph in each of Sections C.3.3.1, C.3.4.1, and C.3.5.1 of NEI 21-07, Revision 1, appears to conflict with guidance in Section C.2.1.1 on the level of detail in the SAR for non-DBA LBEs. Therefore, the staff provides the following clarification: Section C.2.1.1 of NEI 21-07, Revision 1, contains adequate guidance on the level of detail in the SAR to describe non-DBA LBEs. If there is event-specific information associated with the radiological consequence evaluation, the applicant may elect to provide that information in Chapter 3 of the SAR instead of in Section 2.1.1. Further details on the models, site characteristics, and supporting data associated with the calculation of probabilities, mechanistic source terms, and radiological consequences, beyond the content specified for Section 2.1.1 of the SAR (or Chapter 3 for event-specific information), are part of the PRA documentation and can be included in the plant records. c. Addition: In addition to the material identified in NEI 21-07, Revision 1, Section C.3, Chapter 3 of the SAR should also discuss the following: (1) Aircraft impact assessments (10 CFR 50.150, “Aircraft impact assessment” (Ref. 27)). The aircraft impact rule requires nuclear power plant designers to rigorously assess their designs for features and functional capabilities that could provide additional inherent protection to withstand the effects of an aircraft impact. New nuclear power reactor facilities will be inherently more robust with regard to aircraft impact than facilities designed in the absence of the aircraft impact rule. When implementing 10 CFR 50.150, applicants should use RG 1.217, “Guidance for the Assessment of Beyond-Design-Basis Aircraft Impacts” (Ref. 28), which describes a method that the NRC staff considers acceptable for use in satisfying the regulations at 10 CFR 50.150. RG 1.217 endorses the industry guidance document NEI 07-13, Revision 8P, “Methodology for Performing