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:
s that support the safety functions. The displays and controls shall be independent and diverse from the safety computer system identified in items 1 and 3 above. Applicability — RTS, ESFAS, diverse instrumentation and control systems, control systems, and supporting data communication systems in plants utilizing digital computer-based RTS or ESFAS. Review Methods — BTP HICB-19 provides guidance for the evaluation of compliance with this requirement. SRP Sections 7.7 and 7.8 provide guidance for the review of control system and diverse instrumentation and control system features that are credited as non-safety diverse means of protecting against common-mode failure within the safety systems. b. Item II.T, "Control Room Annunciator (Alarm) Reliability," of Staff Requirements Memorandum on SECY-93-087, “Policy, Technical, and Licensing Issues Pertaining to Evolutionary and Advanced Light-Water Reactor (ALWR) Designs” The annunciator system is considered to consist of sets of alarms (which may be displayed on tiles, video display units (VDUs), or other devices) and sound equipment; logic and processing support; and functions to enable operators to silence, acknowledge, reset, and test alarms. Rev. 4 — June 1997 SRP 7.1-A-21 The main control room (MCR) shall contain compact, redundant operator workstations with multiple display and control devices that provide organized, hierarchical access to alarms, displays, and controls. Each workstation shall have the full capability to perform MCR functions as well as support division of tasks between two operators. The display and control features shall be designed to satisfy existing regulations, for example: separation and independence requirements for Class 1E circuits (IEEE Std 384, "Criteria for Separation of Class 1E 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