Document: NUREG-0800
Document ID: a2598df1-7ec6-43a6-9d2a-d8210d1f944f
Document Type: srp
Title: through 7.9. Additional information relevant to the review process can be found in the references in
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500461.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
The review of topics 4, 5, and 6 may be conducted once to evaluate a design process that is common to multiple systems. The review of topic 7 should involve a sample of the products from each digital I&C system described in Chapter 7 of the applicant/licensee's safety analysis report. For a system incorporating commercial-grade digital equipment, the seven topics still apply, but the review of the commercial-grade elements will be performed differently. For a commercial-grade element of the system, there should be evidence of the application of an acceptance process that has determined that there is reasonable assurance that the equipment will perform its intended safety function and, in this respect, is deemed equivalent to an item designed and manufactured under a 10 CFR Part 50, Appendix B, quality assurance program. The acceptance process itself is subject to the applicable provisions of 10 CFR Part 50, Appendix B. This process might vary depending on the specifics of the particular commercial-grade equipment and its intended application; however, it must establish the required assurance. The subject of qualification of existing commercial computers is addressed in Reg. Guide 1.152 Rev. 1, “Criteria for Digital Computers in Safety Systems of Nuclear Power Plants.” An acceptable process is described in EPRI TR- 106439, “Guideline on Evaluation and Acceptance of Commercial Grade Digital Equipment for Nuclear Safety Applications.” C.2. Review Process for Software in Digital Instrumentation and Control Systems For software, the interaction between review topics 4, 5, 6, and 7 is illustrated in Figure 7.0-A-3. In this figure, software requirements are depicted as two subsets of requirements: I&C system-level functional requirements, and software development process requirements. I&C system-level functional requirements describe what function the system is to perform, while software development process requirements describe how the process of building the