Document: NUREG-0800
Document ID: 949ca18d-b0e4-4b54-9ca9-fdb657988111
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660170.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
ddressing [TMI Action Plan Item II.G.1] Power for Pressurizer Level Indication and Controls for Pressurizer Relief and Block Valves "Provide power supplies for pressurizer relief valves, block valves, and level indicators such that: (A) level indicators are powered from vital buses, (B) motive and control power connections to the emergency power sources are through devices qualified in accordance with requirements applicable to systems important to safety, and (C) electric power is provided from emergency power sources. (Applicable to PWRs only)." Applicability - Information systems important to safety in PWRs, and safe shutdown systems. Review Methods - Pressurizer level indication, block valve position indication, and relief valve position indication should be supplied from a source of emergency power in the event of a loss of offsite power. The power supplies should conform with the guidance of NUREG-0737. The evaluation of conformance with this requirement should be addressed in the review of Sections 7.4 and 7.5 of the SAR. The review of this requirement should be coordinated with the organization responsible for the review of electrical systems. (l) 10 CFR 50.34(f)(2)(xxii): Addressing [TMI Action Plan Item II.K.2.9] Failure Modes and Effects Analysis of Integrated Control System "Perform a failure modes and effects analysis of the integrated control system (ICS) to include consideration of failures and effects of input and output signals to the ICS. (Applicable to Babcock and Wilcox (B&W) - designed plants only)." Applicability - Control systems in B&W - designed plants. Review Methods - The recommendations of the generic failure modes and effects analysis described in BAW-1564, "Integrated Control System Reliability Analysis," should be incorporated into the design if this analysis applies to the plant. Otherwise a plant-specific failure modes and effects analysis should be conducted in accordance with NRC orders on B&W plants, and NUREG-0694. The evaluation