Document: NUREG-0800
Document ID: b9958157-a0b8-4321-b294-effbf265eda5
Document Type: srp
Title: ENGINEERED SAFETY FEATURES SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070560004.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
Nuclear Power Plant Safety Systems.” The ESFAS conforms to the guidelines on the application of the single-failure criterion in IEEE Std 379-2000, “IEEE Standard Application of the Single-Failure Criterion to Nuclear Power Generating Station Safety Systems,” as supplemented by Regulatory Guide 1.53, “Application of the Single-Failure Criterion to Safety Systems.” Based on the review, the staff concludes that the ESFAS satisfies the requirement of [IEEE Std 279-1971 or IEEE Std 603-1991] with regard to the system reliability and testability. Therefore, the staff finds that the ESFAS satisfies these requirements of GDC 21. The ESFAS conforms to the guidelines in Regulatory Guide 1.75, “Criteria for Independence of Electrical Safety Systems,” for the protection system independence. Based on the review, the staff concludes that the ESFAS satisfies the requirement of [IEEE Std 279-1971 or IEEE Std 603-1991] with regard to the system’s independence. Therefore, the staff finds that the ESFAS satisfies the requirements of GDC 22. Based on the review of the failure modes and effects analysis for the ESFAS, the staff concludes that the system is designed to fail into a safe state if conditions such as disconnection of the system, loss of energy, or a postulated adverse environment are experienced. Therefore, the staff finds that the ESFAS satisfies the requirements of GDC 23. Based on the review of the interfaces between the ESFAS and plant operating control systems, the staff concludes that the system satisfies the requirements of [IEEE Std 279-1971 or IEEE Std 603-1991] with regard to control and protection system interactions. Therefore, the staff finds the ESFAS satisfies the requirements of GDC 24. 7.3-10 Revision 5 - March 2007 Based on the review of the ESFAS, the staff concludes that the system satisfies the protection system requirements for malfunctions of the reactivity control system such as accidental withdrawal of control rods. Chapter 15 of the