Document: NUREG-0800
Document ID: f2ddec6c-0cce-4223-b813-233678ee07d0
Document Type: srp
Title: DIVERSE INSTRUMENTATION AND CONTROL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B171.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.8
CFR Part: 
CFR Title: 

Content:
eport (SER). The reviewer also states the bases for those conclusions. 1. Evaluation findings applicable to any diverse I&C system: The staff conducted a review of these systems for conformance to the guidelines in the RGs and industry codes and standards applicable to these systems. The staff concludes that the applicant/licensee adequately classified and identified the guidelines applicable to these systems. Based on the review of the system design for conformance to the guidelines, the staff finds there is reasonable assurance the systems fully conform to the guidelines applicable to these systems. Therefore, the staff finds that the applicable requirements of GDC 1, 10 CFR 50.54(jj) and 10 CFR 50.55(i) have been met. The diverse I&C systems are appropriately isolated from safety systems. Therefore, the staff concludes that the independence of these systems from safety systems satisfies the requirements of 10 CFR 50.55a(h) and GDC 24. Based on the applicant or licensee’s commitment to the quality assurance guidance of Generic Letter 85-06 and review of the design of the diverse I&C systems, the staff finds that the quality assurance requirements of GDC 1 have been met. Based on the review of diverse I&C system status information, manual initiation capabilities, and provisions to support safe shutdown, the staff concludes that information is provided to monitor the system over the anticipated ranges for normal operation, for anticipated operational occurrences, and for accident conditions as appropriate to assure adequate safety. Appropriate controls are provided for manual initiation of diverse I&C functions. These manual controls are to be independent of the digital systems that provide automatic initiation of the same functions. The diverse I&C systems appropriately support actions to operate the nuclear power unit safely under normal conditions and to maintain it in a safe condition under accident conditions. Therefore, the staff finds that the design of the