Document: NRC Regulatory Guide
Document ID: 30e6fa68-c7c1-4266-ba45-e06d1bbc07a0
Document Type: regulatory_guide
Title: Criteria for Accident Monitoring Instrumentation for Nuclear Power Plants (Rev. 5)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1708/ML17083A134.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.97
CFR Part: 
CFR Title: 

Content:
ation rules incorporates, by reference, a design certification document that requires combined license applicants to implement SAMGs. Because the SAMGs cannot be implemented without instrumentation to determine what actions are needed during a severe accident, these licensees require Type F variables. For other plants, implementation of SAMGs is voluntary. However, as of the date of issue of this RG, every nuclear power plant in the United States has voluntarily implemented SAMGs. The plants cannot do so without an equivalent to Type F variables, and therefore this guidance may be useful to them. IEEE Std. 497-2016 also includes four informative annexes: • Annex A, “Accident monitoring instrument channel accuracy,” provides general guidance. Clause A.2 provides guidance on accuracy requirement groupings according to the control room personnel usage. Clause A.3 provides typical accuracy requirements. • Annex B, “Examples of monitoring channel displays,” provides examples, as figures, of how sensors, signal processing, data validation, and displays may be configured to provide accident monitoring instrumentation. • Annex C, “Operational state diagram,” provides a table showing the relationship of the plant state to the procedure used for the various plant states (for all states from normal operation to severe accidents). • Annex D, “Bibliography,” lists the references cited in the standard and identifies how they may be obtained. Harmonization with International Standards The NRC has a goal of harmonizing its guidance with international standards, to the extent practical. The International Atomic Energy Agency (IAEA) have issued a significant number of standards, guidance and technical documents, and recommendations addressing good practices in most aspects of radiation protection, including: • IAEA Nuclear Energy Series No. NP-T-3.16, “Accident Monitoring Systems for Nuclear Power Plants,” February 2015 (Ref. 16). • IAEA Safety