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:
o-one correlation with the standards incorporated by reference in 10 CFR 50.55a(h). However, the NRC does not endorse these standards and guides and does not recognize these standards and guides as an acceptable means for complying with the requirements of 10 CFR 50.55a(h). DG-1251, Page 7 • IAEA Safety Standard Guide SSG-39, “Design of Instrumentation and Control Systems for Nuclear Power Plants” (Ref. 35). • IAEA Specific Safety Guide No. SSG-34, “Design of Electrical Power Systems for Nuclear Power Plants” (Ref. 36). • International Electrotechnical Commission (IEC) 60709, Edition 3.0, “Nuclear Power Plants— Instrumentation and Control Systems Important to Safety—Separation” (Ref. 37). • IEC/IEEE 60780-323, Edition 1.0, “Nuclear facilities—Electrical equipment important to safety—Qualification” (Ref. 38). • IAEA Specific Safety Guide No. SSG-69, “Equipment Qualification for Nuclear Installations” (Ref. 39). • IEC 60880, Edition 2.0, “Nuclear Power Plants—Instrumentation and Control Systems Important to Safety—Software Aspects for Computer-Based Systems Performing Category A Functions” (Ref. 40). • IEC/IEEE 60980-344, Edition 1.0, “Nuclear Facilities – Equipment Important to Safety – Seismic Qualification” (Ref. 41). • IEC 61226, Edition 4.0, “Nuclear Power Plants—Instrumentation, control and electrical power systems important to safety—Categorization of functions and classification of systems” (Ref. 42). • IEC 61888, Edition 1.0, “Nuclear Power Plants—Instrumentation Important to Safety— Determination and Maintenance of Trip Setpoints” (Ref. 43). • IEC 62385, Edition 1.0, “Nuclear Power Plants—Instrumentation and Control Important to Safety—Methods for Assessing the Performance of Safety System Instrument Channels” (Ref. 44). Documents Discussed in Staff Regulatory Guidance This regulatory guidance addresses the use of a standard developed by the IEEE. This standard contains