Document: NRC Regulatory Guide
Document ID: 74c49394-8dbf-46e7-b62a-b85de93b47d8
Document Type: regulatory_guide
Title: Initial Test Programs for Water-Cooled Nuclear Power Plants + HISTORY - HISTORY 11/2012 – DG-1259 , Proposed Revision 4 11/2006 – DG-1166 , Proposed Revision 3 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1229/ML12298A071.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.68
CFR Part: 
CFR Title: 

Content:
of breakers, transfer devices, converters, inverters, and cables. This testing should simulate, as closely as practical, actual service conditions. c. Demonstrate operation of instrumentation, alarms, and ground detection instrumentation. d. Also, demonstrate redundancy and electrical independence (See Footnote 3) and show that actual total system amperage loads are in agreement with design loads. e. A discharge test of each battery bank should be conducted at full load and for design duration to demonstrate that the battery bank voltage minimum limit and individual cell limits are not exceeded. A-1.h. Engineered Safety Features Engineered safety features (ESFs) are those plant design features provided to prevent, limit, or mitigate the consequences of postulated accidents that are described in the safety analysis report. For the purpose of this guide, ESFs include features that prevent accidents from occurring or bound accident assumptions (such as cold water injection interlocks for PWRs, and rod worth minimizers for BWRs). Because ESFs vary for different plant designs, the list below only illustrates those that are commonly used to prevent, limit, or mitigate the consequences of postulated accidents. If the subject plant design provides other ESFs in addition to (or other than) those listed below, they also should be appropriately tested. Additionally, it should be noted that other categories of systems listed in Section A-1 of this appendix include plant features commonly designated as ESFs, which should be appropriately tested, such as the emergency ac power distribution system (Section A-1.g.(2)), emergency or standby ac power supplies (Section A-1.g.(3)), the dc system (Section A-1.g.(4)), and primary and secondary containments (Section A-1.i). The testing of ESFs should demonstrate that such features will perform satisfactorily in all expected operating configurations or modes. Testing should include demonstrations of correct logic and set points, as well as