Document: NRC Regulatory Guide
Document ID: efedfd77-6515-45c6-9576-45dbd3698d98
Document Type: regulatory_guide
Title: Thermal Overload Protection for Electric Motors on Motor-Operated Valves (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1709/ML17093A932.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.106
CFR Part: 
CFR Title: 

Content:
Regulatory Guide Periodic Review Regulatory Guide Number: 1.106, Revision 2 Title: Thermal Overload Protection for Electric Motors on Motor Operated Valves Office/division/branch: RES/DE/ICEEB Technical Lead: Kenneth A. Miller Staff Action Decided: Reviewed with no issues identified 1. What are the known technical or regulatory issues with the current version of the Regulatory Guide (RG)? Revision 2 of RG 1.106, “Thermal Overload Protection for Electric Motors on Motor Operated Valves,” dated February 2012, describes a method acceptable to NRC staff for complying with regulations in regard to the application of thermal overload protection devices that are integral with the motor starter for electric motors on motor-operated valves. This RG endorses sections of IEEE Standard 603-2009, “Criteria for Safety Systems for Nuclear Power Generating Stations,” and IEEE Standard 741-2007, “Protection of Class 1E Power Systems and Equipment in Nuclear Power Generating Stations,” both of which are the current industry versions available. There are no known technical or regulatory issues. 2. What is the impact on internal and external stakeholders of not updating the RG for the known issues, in terms of anticipated numbers of licensing and inspection activities over the next several years? Use of the current revision of RG 1.106 will have no known impact on internal or external stakeholders at this time. 3. What is an estimate of the level of effort needed to address identified issues in terms of full-time equivalent (FTE) and contractor resources? The NRC staff will continue to monitor NERC standards and, when IEEE Stds. 603 or 741 are revised, the NRC staff will evaluate the revised standards to determine if a revision of RG 1.106 is necessary. In general, updating RG 1.106 is estimated to require approximately 80 - 120 hours of internal staff effort. 4. Based on the answers to the questions above, what is the staff action for this guide (Reviewed with no issues