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
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CFR Title: 

Content:
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 postulated accidents, and to provide guidance to applicants. Regulatory guides are not substitutes for regulations and compliance with them is not required. This regulatory guide contains information collection requirements covered by 10 CFR Part 50 that the Office of Management and Budget (OMB) approved under OMB control number 3150-0011. The NRC may neither conduct nor sponsor, and a person is not required to respond to, an information collection request or requirement unless the requesting document displays a currently valid OMB control number. B. DISCUSSION The Working Group on Qualification of Motors (Subcommittee (SC 2.2) of the Nuclear Power Engineering Committee of the Institute of Electrical and Electronics Engineers, Inc. (IEEE) developed Standard 334-2006, “IEEE Standard for Qualifying Continuous Duty Class 1E Motors for Nuclear Power Generating Stations.” The IEEE Standards Board approved this standard on September 15, 2006, and it was published on January 31, 2007 (Ref. 2). This standard establishes criteria for qualification of continuous duty Class 1E motors, located in mild and harsh environments in nuclear power plants to demonstrate their ability to perform their intended safety functions. The standard also provides guidance for qualification of refurbished motors and insulation systems for motor rewinds. The purpose of qualification is to provide reasonable assurance that safety-related motors can perform their specified safety functions and that no failure mechanisms exist that can lead to a common- cause failure under the postulated service conditions. The standard provides the methods for qualifying safety-related motors. Applicants and licensees should accomplish qualification by using these methods (type testing, operating experience,