Document: NUREG-0800
Document ID: 06884384-e650-488f-bf96-f48afd211643
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550075.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
comply instead with the requirements stated in IEEE Std. 279-1971, "Criteria for Protection Systems for Nuclear Power Generating Stations." IEEE Std. 603-1991, Clause 5.7, requires that capability for testing and calibration of safety system equipment be provided while retaining the capability of the safety systems to accomplish their safety functions. IEEE Std. 603-1991, Clause 5.1, requires that the safety system be able to perform its safety function required for a design basis event in the presence of (1) any single detectable failure within the safety systems concurrent with all identifiable, but non-detectable, failures, (2) all failures caused by the single failure, and (3) all failures and spurious system actions that cause or are caused by the design basis event requiring the safety functions. 10 CFR Part 50 Appendix A, General Design Criterion (GDC) 21, "Protection System Reliability and Testability," requires in part that the protection system be designed for high functional reliability and in-service testability commensurate with the safety functions to be performed. It also requires a design that permits periodic testing of its functioning when the reactor is in operation, including the capability to test channels independently to determine failures and losses of redundancy that may have occurred. GDC 22, "Protection System Independence," requires in part that the protection system be designed to assure that the effects of natural phenomena and of normal operating, maintenance and testing do not result in loss of protection function. 10 CFR Part 50 Appendix B, Criterion XII, "Control of Measuring and Test Equipment," requires in part that measures be established to assure that measuring and testing devices used in activities affecting quality are properly controlled, calibrated, and adjusted at specified periods to maintain accuracy within necessary limits. 2. Relevant Guidance Regulatory Guide 1.22, "Periodic Testing of Protection System Actuation