Document: NUREG-0800
Document ID: 5292500f-1078-455c-aa35-aea15092636c
Document Type: srp
Title: ENGINEERED SAFETY FEATURES SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A082.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
ental 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 single-failure criterion and, therefore, meet the relevant requirements of GDC 34, 35, 38, and 41. 7.3-12 Revision 6 – August 2016 The conclusions noted above are based upon the requirements of (IEEE Std 279-1971 or IEEE Std 603-1991) with respect to the design of the ESFAS. Therefore, the staff finds that the ESFAS satisfies the requirements of 10 CFR 50.55a(h). The applicant or licensee has also incorporated in the system design the (recommendations of the TMI task action plan items or the requirements of 10 CFR 50.34(f)), (identify item number and how implemented) which the staff has reviewed and found acceptable. In the review of the ESFAS, the staff examined the dependence of this system on the availability of essential auxiliary systems. Based on this review and coordination with those having primary review responsibility of auxiliary supporting features and other auxiliary features systems, the staff concludes that the design of the ESFAS is compatible with the functional requirements of auxiliary supporting features and other auxiliary features systems. 2. Note: The following finding applies to systems involving computer-based components. Based on the review of software development plans and the review of the computer software development process and design outputs,