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:
of technical and programmatic information that demonstrates that the design meets the performance objectives of the technology-inclusive fundamental safety functions during design-specific anticipated operational occurrences (AOOs), design-basis events (DBEs), beyond-design-basis events (BDBEs), and design-basis accidents (DBAs). As described in NEI 21-07, Revision 1, section A.3., the “affirmative safety case” should do the following: • Identify design-specific safety functions that are adequately performed by design-specific SSCs. • Establish design-specific features to provide reasonable assurance that credited SSC functions are reliably performed and to demonstrate DID adequacy. C.2 Staff Position: NEI 21-07, Revision 1, Section C.1, provides an acceptable method for developing baseline information related to the plant description, the site description, the overall safety analysis based on the LMP methodology, and a summary of reference or source materials with clarifications and additions as noted below. a. Clarification: NEI 21-07, Revision 1, includes use of the terms “affirmative safety case,” “safety case,” and “licensing case.” To avoid confusion and potential unforeseen consequences, applicants using NEI 21-07, Revision 1, should instead continue to use the established terminology in the current regulatory framework, including use of “safety analysis” and “licensing basis.”7 b. Addition: The LMP methodology endorsed in RG 1.233 by its nature addresses off-normal conditions rather than normal operation. Applicants using NEI 21-07, Revision 1 to develop their SARs should also include additional information in parts of the SAR not derived from the LMP to describe and analyze normal operation. In addition, an applicant using NEI 21-07, Revision 1, is also responsible for demonstrating compliance with all applicable regulations, including exemptions, as necessary, 7 The NRC staff notes that neither the LMP methodology in NEI 18-04