Document: NUREG-0800
Document ID: 6cac2015-4823-4421-9a34-1ee7f23d1ec2
Document Type: srp
Title: or ESFAS — Section 7.3):
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500512.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.2
CFR Part: 
CFR Title: 

Content:
for the RTS and ESFAS. Based upon the Staff's review of these analyses, the Staff concludes that the protection systems, including the DCS, are designed to fail into a safe mode if a condition such as disconnection of the system, loss of energy, or postulated adverse environment is experienced. Therefore, the Staff finds that the DCS satisfies the requirements of GDC 23. Based on the review of the interfaces between the DCS and plant operating control systems, the Staff concludes that the system satisfies the requirements of IEEE Std 279 or IEEE Std 603 with regard to control and protection system interactions. Therefore, the Staff finds that the DCS satisfies the requirements of GDC 24. Based on the review of all the above, the Staff concludes that the DCS satisfies the requirements of GDC 29. The Staff's conclusions noted above are based upon the requirements of IEEE Std 279 or IEEE Std 603 with respect to the design of the DCS. Therefore, the Staff finds that the DCS satisfies the requirement of 10 CFR 50.55a(h) with regard to IEEE Std 279. Additional evaluation findings applicable to all DCSs that support the following functions: safe shutdown systems (Section 7.4), information systems important to safety (Section 7.5), or interlock systems important to safety (Section 7.6): The review included the identification of those systems and components for the DCS which are designed to survive the effects of earthquakes, other natural phenomena, abnormal environments, and missiles. Based upon the review, the Staff concludes that the applicant/licensee has identified those systems and components consistent with the design bases for those systems. Sections 3.10 Rev. 4 — June 1997 SRP 7.9-9 and 3.11 of the SER address the qualification programs to demonstrate the capability of these systems and components to survive these events. Therefore, the Staff finds that the identification of these systems and components satisfies the requirements of GDC 2 and 4. Based on our