Document: NUREG-0800
Document ID: 0698b3f7-427d-4477-8d06-7b4cb5c20c5b
Document Type: srp
Title: INFORMATION SYSTEMS IMPORTANT TO SAFETY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A088.pdf
Revision Date: 2024-06
Chapter: 7
Section ID: 7.5
CFR Part: 
CFR Title: 

Content:
sment - For systems developed in accordance with the guidance of RG 1.97, Revision 4, the review should confirm that the performance assessment fulfils the goals outlined in Clause 5.6, “Performance Assessment Documentation,” of IEEE Std 497. Recommended review emphasis for BISI F. Scope of BISI indications - As a minimum, BISI should be provided for the following systems: - Reactor trip system (RTS) and engineered safety features actuation system (ESFAS) - See SRP Appendix 7.1-B, Subsection 4.13, “Indication of Bypasses,” and SRP Appendix 7.1-C, Subsection 5.8.3, “Indication of Bypasses.” - Interlocks for isolation of low-pressure systems from the reactor coolant system - See SRP BTP 7-1, “Guidance on Isolation of Low-Pressure Systems from the High-Pressure Reactor Coolant System.” - ECCS accumulator isolation valves - See SRP BTP 7-2. “Guidance on Requirements of Motor-Operated Valves in the Emergency Core Cooling System Accumulator Lines.” - Controls for changeover of residual heat removal from injection to recirculation mode - See SRP BTP 7-6, “Guidance on Design of Instrumentation and Controls Provided to Accomplish Changeover from Injection to Recirculation Mode.” G. Conformance with RG 1.47, “Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems.” H. Independence - See SRP Appendix 7.1-B, Subsection 4.7, “Control and Protection System Interaction,” and SRP Appendix 7.1-C, Subsection 5.6, “Independence,” and Subsections 6.3, “Interaction Between the Sense and Command Features and Other Systems.” The indication system should be designed and installed in a manner that precludes the possibility of adverse effects on plant safety systems. Failure or bypass of a protective function should 7.5-11 Revision 6 - August 2016 not be a credible consequence of failures occurring in the indication equipment, and the bypass indication should not reduce the required independence between redundant safety