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:
The preferred means was an automated system. Section 1.8 was added to address potential effects of CCF concerning failure to actuate and spurious actuations. This section was updated based on the ACRS recommendation letter and the EDO response letter to the ACRS (Package ADAMS Accession No. ML12012A138.) Section 1.9 was added to address design attributes to eliminate consideration of CCF - diversity or testability. Revision 6 – July 2012 BTP 7-19-26 3. Acceptance Criteria To accommodate the incorporation of guidance from DI&C-ISG-02, Revision 2, the outline format was expanded as follows: Section 3.1 was created to increase the five acceptance criteria items to nine items and label the section “Special Acceptance Criteria. Item (6) presents the acceptance criteria for using one rather than two manual initiation means of the automatic protection systems and refers to Figure 1. Item (7) provides guidance that if the D3 analysis reveals the need for a diverse means, then the diverse means may be accomplished using either an automated system or manual operator action that meets the acceptance criteria. Item (8) provides guidance on general acceptable characteristics of the diverse means. And Item (9) presents acceptance criteria for the design of the diverse means to minimize the potential for a spurious actuation of the protective system by the diverse means. Section 3.1 was added to provide guidance on acceptability of the interconnection of RTS and ESFAS. Section 3.2 was added to provide guidance that CCF is not a single failure and realistic assumptions may be used in the D3 analysis. Section 3.3 was added to present the acceptance criteria in the use of automation in the diverse means. Section 3.4 was added to present the acceptance criteria in the use of manual 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