Document: NUREG-0800
Document ID: ac3185c1-0851-4b4d-b3f5-31c884360119
Document Type: srp
Title: Setpoints
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A088.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.2
CFR Part: 
CFR Title: 

Content:
Subsections 4.1 and 4.15 Subsection 6.8 Power sources Subsection 4.5 Section 8 (l) GDC 23, “Protection System Failure Modes” “The protection system shall be designed to fail into a safe state or into a state demonstrated to be acceptable on some other defined basis if conditions such as disconnection of the system, loss of energy (e.g., electric power, instrument air), or postulated adverse environments (e.g., extreme heat or cold, fire pressure, steam, water, and radiation) are experienced.” Applicability - The protection systems, RTS, ESFAS, and supporting data communication systems. Review Methods – The review of compliance with GDC 23 is accomplished as part of the review of system integrity requirements discussed in IEEE Std 279-1971 and IEEE Std 603-1991. SRP Appendix 7.1-B and SRP Appendix 7.1-C discuss methods for review of these characteristics. SRP Appendix 7.1-B, Subsection 4.5 and SRP Appendix 7.1-C, Subsection 5.5 provide review guidance that encompasses the review with respect to compliance with GDC 23. The evaluation of conformance to this requirement should be addressed in the review of Sections 7.2 and 7.3 of the SAR. (m) GDC 24, “Separation of Protection and Control Systems” “The protection system shall be separated from control systems to the extent that failure of any single control system component, or channel, or failure or removal Appendix 7.1-A-22 Revision 6 – August 2016 from service of any single protection system component or channel which is common to the control and protection systems leaves intact a system satisfying all reliability, redundancy, and independence requirements of the protection system. Interconnection of the protection and control systems shall be limited so as to ensure that safety is not significantly impaired.” Applicability - All I&C systems. Review Methods – The review of compliance with GDC 24 should address the characteristics listed in the table below. These characteristics are described in