Document: NUREG-0800
Document ID: 4cca74ec-66e0-4765-9c61-cf547e17c308
Document Type: srp
Title: of the plant safety analysis report (SAR).  Although the NRC did not endorse the annexes of
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A114.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.6
CFR Part: 
CFR Title: 

Content:
re is no guidance beyond the requirements of IEEE Std 603-1991. 5.14 Human Factors Considerations (IEEE Std 7-4.3.2, Clause 5.14) There is no guidance beyond the requirements of IEEE Std 603-1991. SRP Chapter 18, “Human Factors Engineering,” provides additional guidance. 5.15. Reliability (IEEE Std 7-4.3.2, Clause 5.15) In addition to the requirements of IEEE Std 603-1991, when reliability goals are identified, the proof of meeting the goals should include the software. The method for determining reliability may include combinations of analysis, field experience, or testing. Software error recording and trending may be used in combination with analysis, field experience, or testing. Additional guidance is provided in Subsection 5.15 of SRP Appendix 7.1-C. As stated in Regulatory Guide 1.152, the NRC does not endorse the concept of quantitative reliability goals as the sole means of meeting the NRC’s regulations for reliability of digital computers in safety systems. Quantitative reliability determination, using a combination of analysis, testing, and operating experience, can provide an added level of confidence in the reliable performance of the computer system. Since there is no widely accepted view on software reliability value, determining a failure probability and therefore a reliability value is not possible. The reviewer should be cautious if vendors or licensees offer such a value. The NRC staff relies on the vendor using a high-quality process of software design to obtain high quality software. The reviewer should expect the software to be of the highest quality, but should not depend on the software being perfect. 6. SENSE AND COMMAND FEATURES FUNCTIONAL AND DESIGN REQUIREMENTS (IEEE Std 7-4.3.2. Clause 6) There is no guidance beyond the requirements of IEEE Std 603-1991. Appendix 7.1-D-22 Revision 1 - August 2016 7. EXECUTE FEATURES FUNCTIONAL AND DESIGN REQUIREMENTS (IEEE Std 7-4.3.2. Clause 7) There is no guidance beyond the requirements of IEEE