ML070890116
| ML070890116 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/26/2007 |
| From: | Head S South Texas |
| To: | Document Control Desk, NRC/NRR/ADRO |
| References | |
| NOC-AE-07002111, NOC-AE-07002137, TAC MD4092 | |
| Download: ML070890116 (3) | |
Text
Nuclear Operating Company N E South kw Plud Ekdrfc Gen$ft Statlb P.. BPO 289 nads&wvor1 Tcas 77483
'IAA,.
March 26, 2007 NOC-AE-07002137 10CFR50.90 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Unit 1 Docket No. STN 50-498 Withdrawal of Proposed Change to Technical Specification 3.7.4, "Essential Cooling Water System"
Reference:
Draft Letter from C. T. Bowman to NRC Document Control Desk dated January 25, 2006, "Proposed One-Time Change to Technical Specification 3.7.4, "Essential Cooling Water System," and Associated Supported Systems Limiting Condition for Operation Action Statements" (NOC-AE-070021 11).
[TAC No. MD4092]
STP Nuclear Operating Company (STPNOC) hereby withdraws the referenced proposed amendment to South Texas Project Unit 1 Operating License NPF-76. The proposed amendment would have extended on a one-time basis the Allowed Outage Time (AOT) for an inoperable Unit 1 Train B Essential Cooling Water System, and its associated supported systems, for an additional 7 days.
Unit 1 Train B ECW was declared inoperable on January 21, 2007 to disassemble the pump and perform planned corrective and preventive maintenance. While inspecting the pump motor, STPNOC found excessive axial movement in the pump motor shaft. Resolution of this condition required corrective maintenance that was not in the original planned scope and presented challenges to STPNOC's ability to restore Unit 1 Train B to operable status before the allowed outage time (AOT) would have expired. Therefore, STPNOC began preparation of an emergency License Amendment Request (LAR) to extend the AOT for an additional 7 days. As part of STPNOC's emergency LAR preparation, a draft copy of the LAR was provided to the staff. However, repair and return to service of the ECW pump were successfully completed within the existing AOT; therefore an amendment request was not needed.
There are no commitments in this letter.
STI: 32135501 A
D
NOC-AE-07002137 Page 2 of 3 Please contact James Morris at (361) 972-8652 or me at (361) 972-7136 if you have any questions regarding this matter.
Scott M. Head Manager, Licensing jnn/
NOC-AE-07002137 Page 3 of 3 cc:
(paper copy)
(electronic copy)
Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Senior Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 289, Mail Code: MN116 Wadsworth, TX 77483 C. M. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704 Richard A. Ratliff Bureau of Radiation Control Texas Department of State Health Services 1100 West 49th Street Austin, TX 78756-3189 A. H. Gutterman, Esquire Morgan, Lewis & Bockius LLP Mohan C. Thadani U. S. Nuclear Regulatory Commission Steve Winn Christine Jacobs Eddy Daniels Marty Ryan NRG South Texas LP Ed Alarcon J. J. Nesrsta R. K. Temple Kevin Pollo City Public Service Jon C. Wood Cox Smith Matthews C. Kirksey City of Austin