Document: NUREG-0800
Document ID: 65f2433f-2c4a-4580-b173-0c6da7fa4d73
Document Type: srp
Title: Draft Revision 7 – August 2015
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A996.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
ated protective actions. IEEE Std 603-1991, Clause 7.2, “Manual Control,” requires in part that the means of any manual control of any execute features shall not defeat requirements of Clauses 5.1 and 6.2. IEEE Std 279-1971, Clause 4.2, requires in part that “any single failure within the protection system shall not prevent proper protective action at the system level when required.” IEEE Std 279-1971, Clause 4.17, “Manual Initiation,” requires in part that the protection system shall include means for manual initiation of each protective action at the system level. 10 CFR 50.62, “Requirements for Reduction of Risk from Anticipated Transients without Scram (ATWS) Events for Light-Water-Cooled Nuclear Power Plants,” requires in part various diverse methods of responding to ATWS. 10 CFR Part 50, “Domestic Licensing of Production and Utilization Facilities,” Appendix A, “General Design Criteria for Nuclear Power Plants,” General Design Criterion (GDC) 21, “Protection System Reliability and Testability,” requires in part that “redundancy and independence designed into the protection system shall be sufficient to assure that (1) no single failure results in the loss of the protection function.” GDC 22, “Protection System Independence,” requires in part “that the effects of natural phenomena, and of normal operating, maintenance, testing, and postulated accident conditions on redundant channels do not result in loss of the protection function. Design techniques, such as functional diversity or diversity in component design and principles of operation, shall be used to the extent practical to prevent loss of the protection function.” GDC 24, “Separation of Protection and Control Systems,” requires in part that “interconnection of the protection and control systems shall be limited so as to assure that safety is not significantly impaired.” GDC 29, “Protection against Anticipated Operational Occurrences,” requires, in