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:
ety systems that use digital computer systems. Other applicable regulatory guides are discussed in the acceptance criteria sections below. Many standards exist that can be used to develop software for safety systems. The information in this BTP is generally based on the standards and reports referred to in Section C below, supplemented and modified as appropriate for attaining the required safety functions. This BTP presents specific acceptance criteria for the elements of software reviews; however, important context information is found in the concepts contained in the referenced standards and reports. The reviewer should also understand the specific provisions of applicable regulatory guides. 3. Definitions Activity group — A collection of software life cycle activities, all of which are related to a specific life-cycle topic. Eight activity groups are recognized in this BTP: planning, requirements, design, implementation, integration, validation, installation, and operations and maintenance (see Figure 7-A-1). Design output — Documents, such as drawings and specifications, that define technical requirements of structures, systems, and components (ASME Std NQA-1, "Quality Assurance Requirements for Nuclear Facility Applications"). For software, design outputs are the products of the development process that describe the end product that will be installed in the plant. The design outputs of a software development process include software requirements specifications, software design specifications, hardware and software architecture designs, code listings, system build documents, installation configuration tables, operations manuals, maintenance manuals, and training manuals. Deterministic timing — Timing is deterministic if the time delay between stimulus and response has a guaranteed maximum and minimum. Documentation — Information recorded about a specific life cycle activity. Forty-one activities are recognized in this BTP (see Figure 7-A-1).