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:
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 these guides are Printing Office price. A subscription service for future guides In spe encouraged at all times, and guides will be revised, as appropriate, cific divisions Is available through the Government Printing Office. to accommodate comments and to reflect new information or Information on the subscription service and current GPO prices may experience. This guide was revised as a result of substantive com- be obtained by writing the U.S. Nuclear Regulatory Commission, ments received from the Public and additional staff review. Washington, D.C. 20555, Attention: Publications Sales Manager. Am .... | i•Am in accordance with this standard would be extremely difficult because of differing plant system characteristics. One desirable goal for initial application of the standard would be to provide a relatively wide spectrum of use covering several Quality Group classifications in order to develop adequate experience to determine a breadth of application for the standard. The NRC staff believes that "active" valve assemblies identified in accordance with Section 3.9.3.2 of Regulatory Guide 1.70, Revision 3, "Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants," are representative of such a spectrum as well as being very important to plant safety. Therefore, the staff proposes that the initial application of this standard should, as a minimum, encompass active valve assemblies in systems important to safety. For use with this regulatory guide, the staff intends that active valve assemblies should be identified according to the guidance provided in Subsection 11.2, "Pump and Valve Operability Assurance Program," of Section 3.9.3 of the Standard Review Plan. A proposed revision to the Standard Review Plan will also affect previous