Document: NUREG-0800
Document ID: 150e730a-4fe0-4e1c-851f-bdb4bee4b63e
Document Type: srp
Title: Automatic Control (IEEE Std 603-1991, Clause 7.1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A107.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
The safety system should, with precision and reliability, automatically initiate and execute protective action for the range of conditions and performance requirements except as justified in Clause 4.5 of IEEE Std 603-1991. The applicant’s or licensee's analysis should confirm that the safety system has been qualified to demonstrate that the performance requirements are met. The evaluation of the precision of the safety system should be addressed to the extent that setpoints, margins, errors, and response times are factored into the analysis. SRP BTP 7-12 discusses considerations for the review of the process for establishing safety system setpoints. For digital computer-based systems, the evaluation should confirm that the functional requirements have been appropriately allocated into hardware and software requirements. The evaluation should also confirm that the system's real-time performance is deterministic and known. SRP BTP 7-21 provides guidance for this evaluation.