Document: NUREG-0800
Document ID: dc63e8aa-2a74-4078-9e19-9a26ed1b4d8c
Document Type: srp
Title: Revision 6 – July 2012
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1105/ML110550791.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
nual action as a diverse means of accomplishing safety functions. Section 3.5 was added to provide criteria for use of manual action as a diverse means. The “note” in this section was revised (see Section 4.6 change description below) based on the ACRS recommendation letter and the EDO response letter to the ACRS (Package ADAMS Accession No. ML12012A138.) Section 3.6 was added to provide guidance on applicability to current or new NPPs. Section 3.7 was added to provide guidance on how the effects of CCF on spurious actuation and failure to actuate are to be addressed in relation to plant design basis evaluations. This section was updated based on the ACRS recommendation letter and the EDO response letter to the ACRS (Package ADAMS Accession No. ML12012A138.) Section 3.8 was added to collect guidance and acceptance criteria concerning diversity types and the application of the D3 analysis. Section 3.9 was added to collect guidance and acceptance criteria on system testability and components considered not to have a potential for CCF. Section 3.10 was added to collect guidance and acceptance criteria on the displays and manual controls for compliance with Point 4. Revision 6 – July 2012 BTP 7-19-27 4. Review Procedures To accommodate the incorporation of guidance from DI&C-ISG-02, Revision 2, and to be consistent with Sections B.1 and B.3, the outline format number was applied, (i.e., 4.1, 4.2, 4.3, etc.) Section 4.3 was re-labeled, “Exclusion of Components from D3 Analysis” and the content edited to better reflect this title. The example of the safety evaluation of Westinghouse WCAP-15413 was deleted. Section 4.6 was edited to include the guidance that when operator action is cited as the diverse means then sufficient time for operator action needs to be demonstrated in accordance with Appendix 18-A of SRP Chapter 18. Also, a guidance note was added, “Note: As the difference between Time Available and Time Required for operator action is a measure of the