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:
quirements 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, the staff concludes that the computer systems meet the guidance of Regulatory Guide 1.152. Therefore, the special characteristics of computer systems have been adequately addressed, and the staff finds that the ESFAS satisfies these requirements of GDC 1 and 21. Based on the review of the applicant/licensee’s defense-in-depth and diversity analysis, the staff concludes that the ESFAS complies with the criteria for defense against common-cause failure in digital instrumentation and control systems. Therefore, the staff finds that adequate diversity and defense against common-cause failure have been provided to satisfy these requirements of GDC 21 and 22, and the Staff Requirements Memorandum on SECY-93-087. 3. For DC and COL reviews, the findings will also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items relevant to this SRP section. 7.3-11 Revision 5 - March 2007 4. Note: The following conclusion is applicable to all applications. The conclusions noted above for the ESFAS are applicable to all portions of the systems except for the following, for which acceptance is based upon prior NRC review and approval as noted [list applicable system or topics and identify references]. 5. In addition, to the extent that the review is not discussed in other SER sections, the findings will summarize the staff's evaluation of the ITAAC, including design acceptance criteria, as applicable. V. IMPLEMENTATION The staff will use this SRP section in performing safety evaluations of DC applications and license applications submitted by applicants pursuant to 10 CFR Part 50 or 10 CFR Part 52. Except