Document: NUREG-0800
Document ID: 062bafc6-0bc5-4a2f-a566-7200c0c49d7a
Document Type: srp
Title: ENGINEERED SAFETY FEATURES SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B099.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
FAS conforms to the guidelines in RG 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 Draft Revision 6 – August 2015 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 SAR and SER address the capability of the system to ensure that fuel design limits are not exceeded for such events. Therefore, the staff finds that the reactor trip system satisfies the requirements of GDC 25. The staff conducted a review of the ESF control systems for conformance to the requirements for testability, operability with onsite and offsite electrical power, and single failures. The staff concludes that the ESF control systems are testable and are operable using either onsite or offsite power (assuming only one source is available). Additionally, the controls associated with redundant ESF systems are independent and satisfy the