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:
s 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 proper operation of initiating devices, bypasses, permissive and prohibit interlocks, and equipment protective devices that could shut down or defeat the operation or functioning of such features. This may include testing safety related DC systems in passive plant ESF systems used to bring the plant to hot standby conditions. Concurrent testing of systems or features provided to ensure or support the operation of ESFs should also be conducted to demonstrate that they meet design requirements with the minimum number of operable 6 Regulatory Guide 1.9, “Application and Testing of Safety-Related Diesel Generators in Nuclear Power Plants,” (Ref. 19) should be used as guidance for applicable tests. Appendix A to DG-1259, Page A-9 components available with which these systems are designed to function. Examples of these types of systems are heating, ventilation, and air conditioning systems used to maintain the environment within design limits in the spaces housing ESFs; cooling water and seal injection systems; and protected compressed gas supplies. Appropriate tests should also be conducted to verify the functioning of protective devices such as leak tight covers, structures, or housings (low- pressure pneumatic or vacuum tests) provided to protect ESFs from flooding or keep full systems used to prevent water hammer and possible damage to fluid systems. Tests should be conducted, as appropriate, to verify redundancy and electrical independence (see footnote 3). The following list illustrates the systems and components that should be tested: 1. Emergency Core Cooling Systems (ECCS)7, 8 a. Perform expansion and restraint tests. b. Demonstrate operability using normal and emergency power supplies. c. Demonstrate operability in all modes of operation, including design