ML112580363
| ML112580363 | |
| Person / Time | |
|---|---|
| Issue date: | 02/17/2012 |
| From: | Darrell Murdock NRC/RES/DE/MEEB |
| To: | |
| O'Donnell, Edward, RES/DE/RGB 251-7455 | |
| Shared Package | |
| ML112580307 | List: |
| References | |
| DG-1264 RG 1.106, rev. 2 | |
| Download: ML112580363 (1) | |
Text
Response to Public Comments for Draft Regulatory Guide DG-1264, Thermal Overload Protection for Electric Motors on Motor Operated Valves Proposed Revision 2 of Regulatory Guide 1.106, dated March 1977 A notice soliciting comments on DG-1264 (proposed Revision 1 of Regulatory Guide 1.106) was published in the Federal Register on April 28, 2010, (75 FR 58444). Comments were received from NEI (ML11187A201) and the resolution of the comments is found below.
No. DG Section Originator Industry Comment NRC Response (finalized 2/15/2012) 1 Regulatory J. C. Butler (NEI) The Regulatory Guide provides The staff agrees with the comment, but Position (ML11187A201) guidance intended to ensure that believes that the existing discussion in Section C satisfies the comment. In thermal overload protection Staff Regulatory Guidance Position 1 devices will not needlessly prevent the regulatory guide takes into account a motor-operated valve motor from the motor-operated valve application, performing its safety-related and addresses valves that are required function. In Section C, the to function immediately during a Design Basis Event or Station Regulatory Positions should take Blackout. It also addresses valves that into account the motor-operated operate during normal plant valve application when conditions, and it addresses motor establishing the condition of the operated valves that do not have an thermal overload protection immediate safety function. Inasmuch devices. as the existing discussion reflects the underlying technical position presented in the comment, no changes were made to the regulatory guide in response to this comment.
The Regulatory Guide should The staff agrees with the underlying position expressed in the comment, but clarify that for valves that have an believes that the RG need not be immediate safety function, any revised to make this point explicitly.
option that bypasses the thermal For valves that have an immediate overload protection can be used, at safety function, the designer can the discretion of the designer, implement at his discretion any of the using the IEEE Standards options that bypasses the thermal overload protection using the specified referenced. sections of Standard IEEE 603-2009 in the regulatory guide. The staff does not believe that the designers discretion in this regard needs any specific discussion in the RG.
Accordingly, no changes were made to the regulatory guide in response to this comment.
2/17/2012