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:
on the design, operation, and testing of electric power systems in nuclear power plants. • RG 1.47, “Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems,” (Ref. 10) provides guidance on bypassed and inoperable status indication for nuclear power plant safety systems. • RG 1.53, “Application of the Single-Failure Criterion to Safety Systems,” (Ref. 11) provides guidance on the application of the single-failure criterion to the electrical power, instrumentation, and control portions of safety systems. • RG 1.75, “Criteria for Independence of Electrical Safety Systems,” (Ref. 12) provides guidance on physical independence requirements of the circuits and electric equipment that comprise or are associated with safety systems. • RG 1.89, “Environmental Qualification of Certain Electric Equipment Important to Safety for Nuclear Power Plants,” (Ref. 13) provides guidance on environmental qualification of electric equipment important to safety to ensure that the equipment can perform its safety function during and after a design basis accident and endorses IEEE Std 323-1974, “IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations” (Ref. 14). DG-1251, Page 3 • RG 1.97. “Criteria for Accident Monitoring Instrumentation for Nuclear Power Plants” (Ref. 15) provides guidance on accident monitoring instrumentation. • RG 1.105, “Setpoints for Safety-Related Instrumentation,” (Ref. 16) provides guidance on the subject related to setpoints for safety systems. • RG 1.118, “Periodic Testing of Electric Power and Protection Systems,” (Ref. 17) provides guidance with respect to periodic testing of the electric power and protection systems. • RG 1.152, “Criteria for Programmable Digital 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