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:
ty valve position (open or closed) in the control room." Applicability - Information systems important to safety. Review Methods - Relief and safety valve position indication should be included in the information systems important to safety and reviewed in accordance with the review guidance provided in SRP Section 7.5. Position indication should be derived from a reliable valve-position detection device or a reliable indication of flow in the discharge pipe. Both position indication and an alarm should be provided in the control room. The valve-position indication may be safety grade. If the position indication is not safety grade, a reliable single-channel direct indication powered from a vital instrument bus may be provided if backup methods of determining valve position are available and are discussed in the emergency procedures as an aid to operator diagnosis of an action. The position indication should also be seismically and environmentally qualified. NUREG-0737 provides additional guidance on conformance with this requirement. The evaluation of conformance with this requirement should be addressed in the review of Section 7.5 of the SAR. (f) 10 CFR 50.34(f)(2)(xii): Addressing [TMI Action Plan Item II.E.1.2] Auxiliary Feedwater System Automatic Initiation and Flow Indication "Provide automatic and manual auxiliary feedwater (AFW) system initiation, and provide auxiliary feedwater system flow indication in the control room. (Applicable to PWRs only)." Applicability - ESFAS and information systems important to safety in pressurized water reactors (PWRs). Review Methods - AFW initiation and flow indication should conform with the requirements applicable to the ESFAS and instrumentation systems. NUREG-0737 provides additional guidance on conformance with this requirement. The evaluation of conformance with this requirement should be addressed in the review of Sections 7.3 and 7.5 of the SAR. (g) 10 CFR 50.34(f)(2)(xvii): Addressing [TMI Action Plan Item II.F.1]