Document: NUREG-0800
Document ID: 5e40cf60-028d-44c3-b9b8-735a6a68a48a
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A036.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
timing requirements may affect system architecture because it may not be possible to get sufficient computational performance for a specific function or group of functions from a single processor, or the locations where functions are performed may be widely separated. Timing requirements may also increase complexity, either by fragmenting the system into multiple processors or by code tuning, which makes the software product harder to understand, verify, or maintain. The digital instrumentation loop often includes the sensor, transmitter, analog-to-digital converter, multiplexer, data communication equipment, demultiplexer, computers, memory devices, controls, and displays. Timing analysis should consider the entire loop. 2. Information to be Reviewed Information to be reviewed is contained in the safety analysis report (SAR), revisions to the SAR, license amendment requests, topical reports, and other applicant/licensee documentation. The SAR and referenced documents typically contain the architectural description, design basis events and analyses, and certain design commitments. Inspections, tests, analyses and BTP 7-21-7 Revision 6 – August 2016 acceptance criteria (ITAAC) or detailed design documents describe designs, tests, analyses, or other methods of demonstrating satisfaction of design commitments for applications made under 10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants.” 3. Acceptance Criteria If the following criteria are met, the staff may conclude that the design or completed system will meet timing requirements, can be verified as correct and timely, or that a prototype system accurately reflects the performance and correctness expected of the actual plant. Some of the criteria described herein may be met by submissions describing a software development process or verification methods that include real-time concerns. Limiting Response Times Limiting response times should be shown to be consistent with safety