ML11252B123
| ML11252B123 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 09/09/2011 |
| From: | Gratton C Division of Operating Reactor Licensing |
| To: | Matthews T Tennessee Valley Authority |
| References | |
| TAC ME5796, TAC ME5797 | |
| Download: ML11252B123 (3) | |
Text
NRR-PMDAPEm Resource From: Gratton, Christopher Sent: Friday, September 09, 2011 7:53 AM To: Matthews, Thomas C IV
Subject:
Deletion of Low Pressure Coolant Injection Motor-Generator Sets for Browns Ferry Nuclear Plant (ME5796/7) - RAI Changes Attachments: ME5796 RAI2 MG Set.docx Mr. Matthews, The purpose of this email is to document the phone call with Mr. Tom Matthews (Tennessee Valley Authority (TVA)) on September 8, 2011, regarding requests for additional information (RAI) concerning TVAs application dated February 25, 2011, Deletion of Low Pressure Coolant Injection Motor-Generator Sets for Browns Ferry Nuclear Plant [BFN], Units 2 and 3.
Due to information gathered during an audit at AREVA NP in support of TVAs amendment request to transition to AREVA fuel at BFN Unit 1 (application dated April 16, 2010), the staff no longer requires the information requested in our May 27, 2011, RAI. The NRC staff informed Mr. Matthews during the call that TVA no longer needed to reply to the May 27, 2011, RAI.
In addition, the NRC staff forwarded via email, additional draft RAI questions on July 18, 2011 (See attached questions). On July 20, 2011, TVA staff informed the NRC staff that a teleconference to clarify the intent of the questions was not necessary. During the teleconference on September 8, 2011, the NRC staff and TVA agreed to respond to the July 18, 2011, RAI by September 18, 2011. In addition, the NRC staff informed TVA that this email would be added to the NRCs Agencywide Documents Access and Management System (ADAMS) to document the changes discussed herein.
If you have any question regarding this email, please contact me at 301-415-1055.
Christopher Gratton Senior Project Manager Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation 1
Hearing Identifier: NRR_PMDA Email Number: 142 Mail Envelope Properties (Christopher.Gratton@nrc.gov20110909075200)
Subject:
Deletion of Low Pressure Coolant Injection Motor-Generator Sets for Browns Ferry Nuclear Plant (ME5796/7) - RAI Changes Sent Date: 9/9/2011 7:52:36 AM Received Date: 9/9/2011 7:52:00 AM From: Gratton, Christopher Created By: Christopher.Gratton@nrc.gov Recipients:
"Matthews, Thomas C IV" <tcmatthews@tva.gov>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 1598 9/9/2011 7:52:00 AM ME5796 RAI2 MG Set.docx 27389 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received: ZZZ
REQUEST FOR ADDITIONAL INFORMATION REGARDING AMENDMENT REQUEST TO DELETE LPCI MG SETS TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT, UNITS 1, 2, AND 3 DOCKET NOS. 50-259, 50-260, AND 50-296
- 1. On Page E-3 of the license amendment request (LAR), the licensee stated that in a previous amendment for Browns Ferry Nuclear Plant (BFN), Unit 1, the Low Pressure Coolant Injection (LPCI) Motor-Generator (MG) Sets, and their Reactor Motor Operated Valve (RMOV) Boards 1D and 1E were removed from service. For BFN, Unit 1, the loads that were once on RMOV Boards 1D and 1E are now powered from BFN, Unit 1, RMOV Boards 1A and 1B. However, BFN, Units 2 and 3 will retain their RMOV Boards D and E in the proposed modification, which will also eliminate the LPCI MG Sets.
Explain why the RMOV Boards D and E relating to BFN Units 2 and 3 would be retained, whereas RMOV Boards 1D and 1E were eliminated for BFN Unit 1.
- 2. On Page E-9 of the LAR, the licensee stated that the feeder breakers for the 480 Volt (V)
RMOV Boards D and E at the applicable 480V Shutdown Boards will be modified from electrically-operated to mechanically-operated.
Please confirm that the proposed modification described above to the breaker operation is for isolation purposes. Discuss whether similar feeder breakers for 480V RMOV Boards A, B, and C at the applicable 480V Shutdown Boards are also of a mechanically-operated type for isolation purposes. In addition, after the breakers are modified to a mechanically-operated type, the remote control capability for these breakers would be lost. Please discuss any changes to plant procedures that would be necessary given the loss of remote control capability.