Document: NRC Regulatory Guide
Document ID: de79d411-4fc9-456e-a5a0-f4a910ca4c9a
Document Type: regulatory_guide
Title: Assumptions Used for Evaluating a Control Rod Ejection Accident for Pressurized Water Reactors (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2111/ML21119A157.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.77
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CFR Title: 

Content:
documents were considered in the development/update of this RG: • IAEA SSG-3, “Development and Application of Level 1 Probabilistic Safety Assessment for Nuclear Power Plants,” issued 2010 (Ref. 15) • IAEA SSG-54, “Accident Management Programmes for Nuclear Power Plants,” issued 2019 (Ref. 16) In addition, the following International Organization for Standardization (ISO) standard was also considered in the development/update of this RG: • ISO 17873: 2004 “Nuclear facilities ─ Criteria for the design and operation of ventilation systems for nuclear installations other than nuclear reactors” (Ref. 17) This RG incorporates similar design and performance guidelines as provided in the IAEA documents and ISO standard and is consistent with the safety principles provided in these publications. Documents Discussed in Staff Regulatory Guidance This RG endorses the use of one or more codes and standards developed by external organizations as third-party guidance documents. These codes, standards and third-party guidance documents may contain references to other codes, standards or third-party guidance documents (“secondary references”). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in a RG as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as described in the specific RG. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in a RG, then the secondary DG-1387, Page 6 reference is neither a legally-binding requirement nor a “generic” NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary