Document: NUREG-0800
Document ID: 6acfc377-3e1c-4cb9-b2d1-500f564d2f4b
Document Type: srp
Title: Draft Revision 6 – August 2015
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159B011.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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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 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 BTP 7-21-7 Draft Revision 6 – August 2015 Limiting response times should be shown to be consistent with safety requirements (e.g., suppress power oscillations, prevent fuel design limits from being exceeded, prevent a non-coolable core geometry). Setpoint analyses and limiting response times should also be shown to be consistent. The reviewer should verify that limiting response times are acceptable to the organizations responsible for reactor