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:
required to be capable of performing their RSFs [required safety functions] in response to external events within 3 The non-LWR PRA standard uses the terms “requirement,” “require,” and other similar mandatory language. However, the use of this language in this RG does not imply that this RG imposes any regulatory requirement or suggest that these standards are the only way to meet the statutory and regulatory requirements. DG-1404, Revision 1, App. B, Page 6 the DBEHL [design-basis external hazard levels], there will be no new DBAs introduced by external hazards. NEI 21-07, Revision 1, Section 6.1.1 clarified the original intent of NEI 18-04 by defining and using the term DBHL rather than DBEHL. Specifically, DBHLs address both traditional external hazards (e.g., seismic events, external floods, high winds) and internal hazards (e.g., internal fires, internal floods, turbine missiles, and high energy line breaks). The efficacy of the DBHLs used in the CP PRA should be confirmed using PRA modeling or supplemental evaluations in the OL PRA. B.4 PRA Elements B.4.1 Table B-1 shows which PRA elements defined in Staff Position C.1.3 of RG 1.247 apply to the minimally acceptable PRA scope and additional PRA elements that may be used to fully implement the LMP methodology at the CP stage. Table B-1. PRA Elements for Non-LWR CP Applications Based on the LMP Methodology Minimally Acceptable PRA Additional PRA Elements Identifier PRA Element Identifier PRA Element C.1.3.2 (IE) Initiating Event Analysis C.1.3.1 (POS) Plant Operating State Analysis C.1.3.3 (ES) Event Sequence Analysis C.1.3.8 (IF) Internal Flood PRA C.1.3.4 (SC) Success Criteria Development C.1.3.9 (F) Internal Fire PRA C.1.3.5 (SY) Systems Analysis C.1.3.10 (S) Seismic PRA C.1.3.6 (HR) Human Reliability Analysis C.1.3.12 (W) High Wind PRA C.1.3.7 (DA) Data Analysis C.1.3.13 (XF) External Flooding PRA C.1.3.11 (HS) Hazard Screening PRA C.1.3.14 (O) Other Hazards PRA C.1.3.15 (ESQ) Event Sequence