Document: NRC Regulatory Guide
Document ID: d2f8b8ab-1272-4d17-99b7-fc17b03f4992
Document Type: regulatory_guide
Title: Periodic Testing of Electric Power and Protection Systems
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003739468.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.118
CFR Part: 
CFR Title: 

Content:
U.S. NUCLEAR REGULATORY COMMISSION K REGULATORY GUI OFFICE OF NUCLEAR REGULATORY RESEARCH REGULATORY GUIDE 1.118 (Draft was issued as DG-1028) PERIODIC TESTING OF ELECTRIC POWER AND PROTECTION SYSTEMS A. INTRODUCTION Section 50.55a, "Codes and Standards," of 10 CFR Part 50, "Domestic Licensing of Production and Utilization Facilities," requires in paragraph (h), "Protection Systems," that protection systems meet the requirements set forth in Institute of Electrical and Electronics Engineers Standard 279,1 "Criteria for Protection Systems for Nuclear Power Generating Sta tions." Section 4.9 of IEEE Std. 279-1971 requires, in part, that means be provided for checking the opera tional availability of each protection system input sen sor during reactor operation and includes examples of how this can be accomplished. Section 4.10 of IEEE Std. 279-1971 requires, in part, that capability be pro vided for testing and calibrating protection system equipment other than sensors and indicates when such equipment must be tested during reactor operation. General Design Criterion 21, "Protection System Reliability and Testability," of Appendix A, "General Design Criteria for Nuclear Power Plants," to 10 CFR Part 50 requires, in part, that the protection system be designed to permit its periodic testing during reactor operation, including a capability to test channels inde pendently to determine failures and losses of redun dancy that may have occurred. General Design Criteri on 18, "Inspection and Testing of Electric Power 1Copies may be purchased from the Institute of Electrical and Electronics Engineers, 345 East 47th Street, New York, NY 10017. USNRC REGULATORY GUIDES Regulatory Guides are Issued to describe and make available to the public such Information as methods acceptable to the NRC staff for Implement ing specific parts of the Commission's regulations, techniques used by the staff in evaluating specific problems or postulated accidents, and data needed by the NRC staff