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:
ctions. The operations manual should describe the operational environment within which the software will operate, including precautions and limitations that must be observed during operations to avoid exposing personnel or the plant to hazards or security vulnerabilities. All variables in the physical environment that the software must monitor and control should be fully described. User interfaces should be fully described for each category of user. Consistency requires that the operations manual be consistent with the system operations, safety system requirements, the safety system design, the SRSs, the SDS, and documented descriptions and known properties of the operational environment within which the safety system will operate. Individual user instructions should not contradict other instructions. Uniform and consistent terminology, notation, and definitions should be used throughout the operations manuals. Style requires that the operations manual be understandable by the users of the manual. A precise definition of each technical term should exist, either in the operations manual or in a separate dictionary or glossary. The operations manual may be organized in the style of a reference manual, with the assumption that its users are well trained. Rev. 4 — June 1997 Appendix 7-A BTP HICB-14-38 Traceability requires that a forward trace exist between the SRS, the operations plan, and the operations manual, which shows how each requirement is to be carried out by the operators, or carried out automatically by the safety system without operator action, and how the results of each requirement are displayed to the operators. A forward trace should also exist from all error messages generated by the code to a description of the error messages in the operations manual. Unambiguity requires that instructions to users have only one interpretation by the users. h. Installation Activities & Maintenance Manuals One or more software maintenance manuals should be produced.