Document: NRC Regulatory Guide
Document ID: d6326081-f430-476d-8098-4edf00868dd9
Document Type: regulatory_guide
Title: Verification, Validation, Reviews, and Audits for Digital Computer Software Used in Safety Systems of Nuclear Power Plants + HISTORY - HISTORY 08/2012 – DG-1267 , Proposed Revision 2 01/2003 – DG-1123 , Proposed Revision 1 08/1996 – DG-1054 , Proposed Revision 0 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1031/ML103160431.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.168
CFR Part: 
CFR Title: 

Content:
hnical Commission (ISO/IEC) 12207:1995, “Information Technology-Software Life Cycle Processes” (Ref. 16); IEEE Std. 1074-1997, “IEEE Standard for Developing Software Life Cycle Processes”; and Software Engineering Process Groups’ capability maturity model integrated (CMMI) process areas. The NRC does not endorse this annex because it provides no guidance for implementing this standard. However applicants and licensees may find it useful, when integrating elements of these standards into their V&V programs. • Annex B, “A Risk-based Software Integrity Level Scheme,” describes the four software integrity levels and associated consequences. This regulatory guide endorses this annex, as described in Staff Regulatory Guidance position 1. • Annex C, “Definitions of Independent V&V (IV&V),” defines software independent V&V. The NRC does not endorse this annex, because it provides inadequate guidance. In Table C.1 the new form of independence provides a conditional option which is not acceptable to the NRC. Branch Technical Position 7-14, “Guidance on Software Reviews for Digital Computer-Based Instrumentation and Control Systems” (Ref. 17) provides additional guidance in this area. • Annex D, “V&V of Reuse Software,” provides options and suggestions to assist the V&V effort of reuse software. The NRC does not endorse this annex because it provides inadequate guidance. Appendix 7.0-A, “Review Process for Digital Instrumentation and Control Systems,” and Branch Technical Position 7-14, “Guidance on Software Reviews for Digital Computer-Based Instrumentation and Control Systems” provide additional guidance in this area. • Annex E, “V&V Measures,” describes the measures for evaluating the quality, effectiveness, and efficiency of the V&V tasks. The NRC does not endorse this annex because no consensus exists on measures for evaluation the quality and coverage of the V&V tasks. However, applicants and licensees may find it useful to