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:
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, analysis as a supplement to type testing and operating experience, ongoing qualification, or any combination thereof). However, the preferred method of qualification is type testing. Changes in IEEE Std 334-2006, IEEE Std 334-1994, and IEEE Std 334-1971: The changes incorporated to IEEE 334-2006 were arrived through an intermediate version issued in 1994. The changes can be summarized as follows: • Included and added significant definitions of terms (Sec. 3.0). • Expanded use of IEEE 334 to include Insulation Systems throughout the document as well as complete motors. • Significantly expanded guidance on “Type Test Models” (Sec. 5.3.2). • Inclusion of thermal criteria for the application of load (Sec. 5.3.2). • Significantly expanded detailed guidance on “Type Test Sequence” (Sec. 5.3.3) primarily through reference and inclusion of other applicable IEEE standards for testing and aging. • Significantly expanded detailed guidance on loading and operational requirements for DG-1150, Page 3 DBE conditions (Sec. 5.3.6). • Provided detailed requirements for Margin (Sec. 5.5). • Provided detailed guidance on documentation requirements (Sec. 7). Proposed RG 1.40, Revision 1 and RG 1.40, dated March 1973: In RG 1.40, the NRC staff took 2 significant exceptions to IEEE Std 334-1971. The staff has now concluded that IEEE Std 334-2006 adequately addresses these exceptions. The basis of this conclusion is as follows: Exception 1: To the extent practicable, auxiliary equipment that will be part of the installed motor assembly should also be qualified in accordance with IEEE Std 334-1971. This statement was included in the RG 1.40 to assure that all equipment required for the motor to perform as intended was included in testing. The following improvements have