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:
ntified in Clause 6.2 of IEEE Std. 497-2016; alternately, applicants should consider NUREG-0800, Chapter 7, Branch Technical Position 7-19, “Guidance for Evaluation of Diversity and Defense-in-Depth in Digital Computer-Based Instrumentation and Control Systems.” Branch Technical Position 7-19 describes the NRC staff’s concerns about common cause failures and provides guidance for evaluating an applicant’s diversity and defense-in-depth assessment, design, and the design of manual controls and displays to ensure conformance with the NRC position on diversity and defense-in-depth for instrumentation and control systems incorporating digital, software-based or software-logic-based reactor trip systems, engineered safety features, auxiliary supporting features, and other auxiliary features as appropriate. • The use of secondary references is clarified in this RG above in the Section B subsection titled, “Documents Discussed in Staff Regulatory Guidance.” The following secondary references should be reviewed to determine the applicable version or revision: o IEEE Std. 379, “IEEE Standard for Application of the Single-Failure Criterion to Nuclear Power Generating Station Safety Systems,” is discussed in RG 1.53. o IEEE Std. 603, “IEEE Standard Criteria for Safety Systems for Nuclear Power Generating Stations,” is incorporated by reference in 10 CFR 50.55a(h) “Protection and Safety Systems.” o IEEE Std. 7-4.3.2, “IEEE Standard Criteria for Programmable Digital Devices in Safety Systems of Nuclear Power Generating Stations,” is discussed in RG 1.152. 8. The design of instrumentation should incorporate human factors guidelines or accepted human factor methods or principles. Clauses 5.3, “Response time,” 8.1.2, “Human factors,” and 8.5, “Display location,” all identify human factor concerns. However, IEEE Std. 497-2016 does not identify any specific human factors guidelines or accepted human factors methods or principles.