Document: NUREG-0800
Document ID: 0270f2da-6b35-430d-b965-99a995adea26
Document Type: srp
Title: (Ref. 3).
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350476.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
nd that the systems required for safe shutdown satisfy the requirements of .GDC 13. Instrumentation and Controls have been provided within the control room to allow actions to be taken to maintain the nuclear power unit in a safe condition during shutdown including a shutdown following an accident. Equipment at appropriate locations outside the control room have been provided (1) with a design capability for prompt hot shutdown of the reactor, including necessary instrumentation and controls to maintain the unit in a safe condition during hot shutdown, and (2) with a potential capability for subsequent cold shutdown of the reactor through the use of suitable procedures. Therefore, we conclude that the systems required for safe shutdown satisfy the requirements of GDC 19. Our review of the instrumentation and controls required for safe shutdown has examined the dependence of these systems on the availability of essential auxiliary supports (EAS) systems. Based on our review and coordination with those having primary review responsibility for the EAS system, we conclude that the design of EAS systems are compatible with the functional performance requirements of these systems. Therefore, we find the interfaces between the design of safe shutdown systems and the design of EAS systems to be acceptable. Our review of the instrumentation and control systems required for safe shutdown included conformance to the requirements for testability, oper- ability with onsite and offsite electrical power, and single failures consistent with the General Design Criteria applicable to safe shutdown systems. We conclude that these systems are testable, and are operable on either onsite or offsite electrical power, and that the controls associated with redundant safe shutdown systems are independent and satisfy the requirements of the single failure criterion and therefore meet the relevant requirements of GOC 34, 35, and 38. The conclusions noted above for the systems required for safe