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:
d to demonstrate proper operation of indicating and alarm devices used to monitor the availability of the emergency power system in the control room. 3. Emergency or Standby AC Power Supplies. Conduct appropriate tests for emergency ac power supplies to establish system reliability targets5 to meet the requirements in 10 CFR 50.63. The testing includes verifying redundancy, electrical dependence, and proper voltage and frequency regulation under transient and steady state conditions. Auxiliary systems (such as those used for starting, cooling, heating, ventilating, lubricating, and fueling) should be appropriately tested to demonstrate that their performance is in accordance with design. Testing should be conducted for a sufficient period of time to ensure that equilibrium conditions are attained. Testing also should demonstrate the proper loading 5 Regulatory Guide 1.155, “Station Blackout,” (Ref. 18) should be used as guidance for testing emergency ac power supply reliability targets. Appendix A to DG-1259, Page A-8 logic, correct set points for trip devices, and proper operation of initiating devices and permissive and prohibit interlocks and should also demonstrate redundancy and electrical independence (see footnote 3). Emergency loads supplied should be confirmed to be in agreement with design sizing assumptions used for the power supplies.6 4. DC System. a. Demonstrate proper calibration and trip settings of protective devices, including relaying, and proper operation of permissive and prohibit interlocks. b. Demonstrate the design capability of batteries, battery chargers, transfer devices, converters, inverters, and emergency lighting systems. Testing should also be conducted to demonstrate the capability of batteries and battery charges, proper operation 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,