Document: NUREG-0800
Document ID: c90016c6-e03f-4224-8ff3-87a6f7d3ca42
Document Type: srp
Title: Appendix 7-A
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500547.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
Appendix 7-A Rev. 4 — June 1997 BTP HICB-14-1 NEW Branch Technical Position HICB-14 Guidance on Software Reviews for Digital Computer-Based Instrumentation and Control Systems A. Background The Staff's acceptance of software for safety system functions is based upon (1) confirmation that acceptable plans were prepared to control software development activities, (2) evidence that the plans were followed in an acceptable software life cycle, and (3) evidence that the process produced acceptable design outputs. This branch technical position (BTP) provides guidelines for evaluating software life-cycle processes for digital computer-based instrumentation and control (I&C) systems. These guidelines are based on reviews of licensee submittals, EPRI's requirements for advanced reactor designs, and the analysis of standards and practices documented in NUREG/CR-6101, "Software Reliability and Safety in Nuclear Reactor Protection Systems." The structure of this BTP is derived from the review process described in Appendix 7.0-A. 1. Regulatory Basis 10 CFR 50.55a(h) requires in part that protection systems satisfy the criteria of ANSI/IEEE Std 279, "IEEE Standard Criteria for Protection Systems for Nuclear Power Generating Stations." Paragraph 4.3 of ANSI/IEEE Std 279 states in part that quality of components is to be achieved through the specification of requirements known to promote high quality, such as requirements for design, inspection, and test. Similar criteria for the quality of components are identified in IEEE Std 603, "IEEE Standard Criteria for Safety Systems for Nuclear Power Generating Stations." 10 CFR 50, Appendix A, General Design Criterion (GDC) 1, "Quality Standards and Records," requires in part that systems and components important to safety be designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety functions to be performed. Where generally recognized codes and standards are used, they should be