Document: NUREG-0800
Document ID: 4f141c71-35ca-4353-9047-a13efe6d56b7
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A308.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
potential for common-cause failure of redundant functions, the SMaintP should require timely evaluation of the effects of reported problems to support equipment operability determinations as required by plant technical specifications. Periodic analysis and reporting of problems and their resolution should be required along with recommendations for improving operation. There should be a requirement for reporting what actions were taken regarding these recommendations. B.3.1.6.3 Resource Characteristics of the SMaintP The resource characteristics that the SMaintP should exhibit include methods/tools. Methods/tools involve a description of the methods, techniques and tools that will be used to accomplish the maintenance function. The SMaintP should describe the facilities required to maintain the delivered software. It should list and describe the software, hardware and associated documentation required to maintain the delivered software. The SMaintP should require that maintenance tools be qualified with a degree of rigor and level of detail appropriate to the safety significance of the software which is to be created using the tools. B.3.1.6.4 Review Guidance for the SMaintP The SMaintP is important because software maintenance is often done after the system has been delivered, installed and accepted, and has been in use for a period of time. By this time, the software development team may have moved on to other projects or other jobs, and the knowledge of how the software works and what it does is limited to the documentation on the software. In addition, software maintenance is often done when the software has failed for some reason, and there may be pressure to quickly fix the problem, and get the system back on line. This may adversely affect the quality of the design, verification, validation and test, and documentation of the modification. For these reasons, the reviewer should determine that the SMaintP requires the same careful and deliberate procedures that