Document: NUREG-0800
Document ID: 743c65f7-fe56-43cc-8658-f69bb64672dc
Document Type: srp
Title: Final Revision 0 – April 2014
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1311/ML13115A156.pdf
Revision Date: 2023-06
Chapter: 18
Section ID: 18
CFR Part: 
CFR Title: 

Content:
that is evaluated in the accident analysis section of the Safety Analysis Report (SAR). • The estimated time available for operators to complete the credited action is sufficient to allow successful execution of applicable steps in the symptom/function-based EOPs.4 • The initial MCR operating staff size and composition assumed for the analysis of time required is the same as the minimum MCR staff defined in the plant’s Technical Specifications. • If credited manual actions require additional operators beyond the Technical Specification minimum crew, the justification for timely availability of the additional 4 The Phase 1 analysis may be conducted using a task sequence based on task analysis, vendor-provided generic technical guidelines for emergency operating procedure development, or plant-specific EOPs, depending on the maturity of the design. Accordingly, it is recognized that it will not be possible in all circumstances to directly assess time available relative to this criterion during the Phase 1 analysis. 18-A-6 Final Revision 0 – April 2014 staffing is provided and the estimate of time required includes any time needed for calling in additional personnel. • The analysis of the action sequence is conducted at a level of detail sufficient to identify individual task components, including cognitive elements such as diagnosis and selection of appropriate response, and the associated performance shaping factors that affect time required and the potential for operator error. • The analysis identifies a time margin between the time required and time available to perform the action and documents the basis for the adequacy of the margin, including consideration of the uncertainty in the estimation of the margin. PHASE 2: PRELIMINARY VALIDATION This section describes the attributes of an acceptable method for preliminarily validating the time required to take manual operator actions that are credited in a defense-in-depth analysis. Note: Licensees