Document: NUREG-0800
Document ID: a59a01e7-d1e2-4946-bebf-a5fff5731c47
Document Type: srp
Title: of the SAR.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500493.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
Equipment and Circuits"); criteria for protection systems (ANSI/IEEE Std 279); and requirements for manual initiation of protective actions at the systems level (Reg. Guide 1.62, "Manual Initiation of Protection Action"). The designer shall use existing defensive measures (e.g., segmentation, fault tolerance, signal validation, self-testing, error checking, and supervisory watchdog programs), as appropriate, to ensure that alarm, display, and control functions provided by the redundant workstations meet these standards. Alarms that are provided for manually controlled actions for which no automatic control is provided, and that are required for the safety systems to accomplish their safety functions, shall meet the applicable requirements for Class 1E equipment and circuits. Applicability — Information systems important to safety and supporting data communication systems in advanced light water reactors. Review Methods — Section 7.5 describes methods for review of annunciator systems in ALWRs. 4. Regulatory Guides (including endorsed industry codes and standards) and Branch Technical Positions a. Regulatory Guide 1.22, "Periodic Testing of Protection System Actuation Functions" Applicability — RTS, ESFAS, diverse instrumentation and control systems, and supporting data communication systems. Review Methods — Reg. Guide 1.22 provides bases for evaluating conformance to GDC 21 and ANSI/IEEE Std 279, Sections 4.10 through 4.13. BTP HICB-8 describes the Staff position on the scope of periodic testing in protection systems. BTP HICB-17 provides additional guidance on acceptable periodic testing provisions for digital computer-based systems. b. Regulatory Guide 1.47, "Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems" Applicability — RTS, ESFAS, information systems important to safety, safety interlock systems, and supporting data communication systems. Review Methods — Reg. Guide 1.47 provides bases for evaluating conformance to