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:
lity of electrical room heaters, air spargers, and/or heat tracing. e. Verify proper operation of the SLCS nitrogen pressurization system, if provided. f. Conduct test firings of squib-actuated valves and demonstrate design injection capability. g. Conduct tests, as appropriate, to verify redundancy and electrical independence. A-1.c. Reactor Protection System and Engineered Safety Features Actuation Systems 1. Verify (by testing) the response time of each of the protection channels, including sensors.2 Acceptance criteria for the response time of the protection channels should account for the response time of the associated hardware between the measured variable and the input to the sensor (e.g., snubbers, sensing lines, and flow-limiting devices). 2. Verify proper operation in all combinations of logic; calibration and operability of primary sensors; proper trip and alarm settings; proper operation of permissive, prohibit, and bypass functions; and operability of bypass switches. 3. Demonstrate redundancy, electrical independence,3 coincidence, and safe failure on loss of power. 4. If appropriate for the facility design, demonstrate the operability of backup scram solenoid valves and devices, including detectors, logic, and final control elements to protect the facility for anticipated transients without scram. A-1.d. Residual or Decay Heat Removal Systems 1. Verify the operability of systems and design features provided or relied on to dissipate or channel thermal energy from the reactor to the atmosphere or to the main condenser or 2 Regulatory Guide 1.118, “Periodic Testing of Electric Power and Protection Systems,” (Ref. 15) provides a test criterion that is also acceptable for preoperational testing of protection channels, including sensors. 3 Regulatory Guide 1.41, “Preoperational Testing of Redundant Onsite Electric Power Systems to Verify Proper Load Group Assignments,” (Ref. 16) should be used as guidance for appropriate tests. Appendix A to