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:
ormance, This section states that the qualification program shall demonstrate that the motor (inclusive of auxiliary equipment per Sec. 3.3) is able to start, accelerate to operating speed and operate under all specified combinations of driven equipment load and speed variations and environmental conditions. Sec. 5.3.2, Type Test Model, Para 1, states that the model should be composed of a full size motor or scale model that incorporates essential components used in production equipment such as bearings, seals, lead seals, lubricants and “other essential accessory devices and equipment”. This paragraph goes on to state that if accessories of production motors are different than the test model, then the production motor accessories must also be qualified. Paragraph 3 of this section specifically defines requirements for loading the “type test model” to various operational and environmental conditions. Sec. 5.3.6, Design Basis Event Conditions, Paragraph 3 states, “The design-basis-event simulation shall also include testing the motor or insulation system model for a period of time equivalent to the duration following the design basis event for which the motor’s safety function(s) are required. During this time, the motor or insulation system model shall be operated to simulate its specified requirements during the post-event period, including stopping, starting, or continuous operation. The duration of this test shall equal the post-event service period, including margin.” This section goes on to provide specific worst case scenarios of stopping, starting, etc. DG-1150, Page 5 C. REGULATORY POSITION The NRC staff considers conformance with IEEE Standard 334-2006 an acceptable method for use in satisfying the Commission’s regulations with respect to qualification of continuous duty safety- related motors. IEEE Standard 334-2006 references several industry codes and standards. If the NRC’s regulations separately incorporate a referenced standard,