Document: NRC Regulatory Guide
Document ID: c07843ce-fb70-4e28-ba72-7f6eaee2562d
Document Type: regulatory_guide
Title: Qualification of Continuous Duty Safety-Related Motors for Nuclear Power Plants + HISTORY - HISTORY DG-1150 , Proposed Revision 1, published 8/2009 (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0912/ML091200454.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.40
CFR Part: 
CFR Title: 

Content:
ER PLANTS A. INTRODUCTION The U.S. Nuclear Regulatory Commission’s (NRC’s) regulations in Title 10, of the Code of Federal Regulations, Part 50, “Domestic Licensing of Production and Utilization Facilities” (10 CFR Part 50) (Ref. 1), require that structures, systems, and components in a nuclear power plant that are important to safety be designed to accommodate the effects of environmental conditions (i.e., they must remain functional under postulated design-basis events (DBEs)). General Design Criteria (GDC) 1, “Quality Standards and Records,” 2, “Design Bases for Protection against Natural Phenomena,” 4, “Environmental and Dynamic Effects Design Bases,” and 23, “Protection System Failure Modes,” of Appendix A, “General Design Criteria for Nuclear Power Plants,” to 10 CFR Part 50, contain the general requirements for meeting those conditions. The specific requirements in 10 CFR 50.49, “Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants,” for the qualification of certain electrical equipment important to safety augment the general requirements of GDC 1, 2, 4, and 23. In addition, Criterion III, “Design Control,” of Appendix B, “Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants,” to 10 CFR Part 50, requires that test programs, when used to verify the adequacy of a specific design feature, should include the suitable qualification testing of prototype units under the most adverse design conditions. This guide describes a method that the NRC staff considers acceptable for complying with the Commission’s regulations for the qualification of continuous duty safety-related motors for nuclear power plants. DG-1150, Page 2 The NRC issues regulatory guides to describe methods that the staff considers acceptable for use in implementing specific parts of the agency’s regulations, to explain techniques that the staff uses in evaluating specific problems or