Document: NRC Regulatory Guide
Document ID: 0df18aa6-42a8-4990-aa7e-3df6d0907f3f
Document Type: regulatory_guide
Title: Criteria for Safety Systems (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2511/ML25114A021.pdf
Revision Date: 2025-11
Chapter: 
Section ID: RG-1.153
CFR Part: 
CFR Title: 

Content:
gital Devices in Safety-Related Systems of Nuclear Power Plants,” (Ref. 18) provides guidance on high functional reliability, design quality, and a secure development and operational environment for the use of digital computers in the safety systems. • RG 1.180, “Guidelines for Evaluating Electromagnetic and Radio-Frequency Interference in Safety-Related Instrumentation and Control Systems,” (Ref. 19) provides guidance to on design, installation, and testing practices for addressing the effects of electromagnetic and radio- frequency interference and power surges on safety-related I&C systems. • RG 1.209, “Guidelines for Environmental Qualification of Safety-Related Computer-Based Instrumentation and Control Systems in Nuclear Power Plants,” (Ref. 20) provides guidance on environmental qualification procedures for safety-related computer-based I&C systems for service and addresses the application of microprocessor-based technology and endorses IEEE Std 323-2003, “IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations” (Ref. 21). • NUREG-0800, “Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants: LWR Edition,” (Ref. 22). The Standard Review Plan provides guidance to NRC staff in performing safety reviews under Part 50 and 52. • NUREG/CR-6303, “Method for Performing Diversity and Defense-in-Depth Analyses of Reactor Protection Systems,” (Ref. 23) describes a method for analyzing computer-based nuclear reactor protection systems that discovers design vulnerabilities to common-mode failure. • NUREG/CR-7007, “Diversity Strategies for Nuclear Power Plant Instrumentation and Control Systems,” (Ref. 24) presents the technical basis for establishing acceptable mitigating strategies that resolve diversity and defense-in-depth assessment findings. Purpose of Regulatory Guides The NRC issues RGs to describe methods that are acceptable to the staff for implementing specific