Document: NUREG-0800
Document ID: cd35e91a-3d44-430c-9102-2c8a74c133ab
Document Type: srp
Title: SAFE SHUTDOWN SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A086.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.4
CFR Part: 
CFR Title: 

Content:
or safe shutdown satisfy the requirements of GDC 13. I&C 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 has been provided (1) with a design capability for prompt, hot shutdown of the reactor, including necessary I&C 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, the staff concludes that the systems required for safe shutdown satisfy the requirements of GDC 19. The review of the I&C systems required for safe shutdown includes conformance to the requirements for testability, operability with onsite and offsite electrical power, and single failures as appropriate based on their safety function consistent with the General Design Criteria applicable to safe shutdown systems. The staff concludes 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 General Design Criteria 34, 35, and 38. In the review of the safe shutdown systems, the staff examined the power supply for the pressurizer level indication. Based on this review, the staff concludes that the safe shutdown systems satisfy the requirements of 10 CFR 50.34(f)(2)(xx). In the review of the safe shutdown systems, the staff examined the dependence of these systems on the available auxiliary supporting features and other auxiliary features. Based on this review and coordination with those having primary review responsibility of 7.4-10 Revision 6 – August 2016 auxiliary supporting features and other auxiliary features systems, the staff