Document: NRC Regulatory Guide
Document ID: 60ac4a53-3f72-4e92-9ad2-39c736cf2135
Document Type: regulatory_guide
Title: Functional Specification for Active Valve Assemblies in Systems Important to Safety in Nuclear Power Plants
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003739979.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.148
CFR Part: 
CFR Title: 

Content:
cipated that the breadth of application of this standard might develop gradually with user experience, quality group classification of a particular valve assembly, and valve assembly function within a given plant system. In this context, specifications would most likely evolve from systems analyses and, as such, could be compatible with applicable system safety criteria through appropriate use of limit range, maxima, minima, envelope of important parameters, or generally accepted approaches consistent with industry practice. It is evident that a thorough process to identify specific valve assemblies that should have functional specifications 3A valve assembly is composed of the pressure-retaining parts of the valve body, internals, actuator, and functional accessories. USNRC REGULATORY GUIDES Comments should be sent to the Secretary of the Commission, U.S. Nuclear Regulatory Commission, Washington, D.C. 20555, Regulatory Guides are issued to describe and make available to the Attention: Docketing and Service Branch. public methods acceptable to the NRC staff of implementing specific parts of the Commission's regulations, to delineate tech- The guides are issued In the following ten broad divisions: niques used by the staff in evaluating specific problems or postu lated accidents or to provide guidance to applicants. Regulatory 1. Power Reactors 6. Products Guides are noi substitutes for regulations, and compliance with 2. Research and Test Reactors 7. Transportation them Is not required. Methods and solutions different from those set 3. Fuels and Materials Facilities 8. Occupational Health out in the guides will be acceptable If they provide a basis for the 4. Environmental and Siting 9. Antitrust and Financial Review findings requisite to the issuance or continuance of a permit or 5. Materials and Plant Protection 10. General license by the Commission. Copies of issued guides may be purchased at the current Government Comments and suggestions for improvements in