ML081760266
| ML081760266 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 06/18/2008 |
| From: | Head S South Texas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NOC-AE-08002315 | |
| Download: ML081760266 (3) | |
Text
Nuclear Operating Company South Texas Prolect Electric Generatin; Station P.O Box 289 Wadsworth. Texas 77483 June 18, 2008 NOC-AE-08002315 10CFR50.90 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Withdrawal of Proposed Amendment to Technical Specification 3.8.3.1
Reference:
Letter dated March 6, 2008, from Charles T. Bowman, STPNOC, to NRC Document Control Desk, "Proposed Amendment to Technical Specification 3.8.3.1", (NOC-AE-08002255, ML080740226)
In the referenced correspondence, STP Nuclear Operating Company (STPNOC) submitted a request for an amendment to the South Texas Project Operating Licenses NPF-76 and NPF-80 to revise the required action and completion time for specific inverters governed by Technical Specification (TS) 3.8.3.1. STPNOC has determined that the proposed change to the Technical Specifications is not needed and is hereby withdrawing the proposed amendment.
STP TS 3.8.3.1 allows the application of the Configuration Risk Management Program (CRMP) associated with Risk Managed Technical Specifications (RMTS) to the inverters with loads modeled in the STP Probabilistic Risk Analysis (PRA). However, the loads on the inverters and associated Distribution Panels DPOO1 and DP002 are of low risk significance and are not specifically modeled in the PRA. NEI 06-09, "Risk Managed Technical Specifications Guidelines" which is the basis for the STP RMTS limits the application of RMTS to components that are not specifically modeled in the PRA to configurations where a quantified risk-informed completion time can be calculated. At the time of the submittal STPNOC did not believe RMTS could be applied to the inverters associated with DPOO1 and DP002. However, STPNOC has determined that the risk contribution when either of the inverters is inoperable can be bounded by a Component Cooling Water function powered from the inverters. Therefore, a conservative risk-informed completion time can be calculated for failure of the inverters in accordance with the provisions of NEI 06-09 and the proposed change to the Technical Specifications is not needed.
STI: 32322378
NOC-AE-08002315, Page 2 of 3 If there are any questions regarding the proposed amendment, please contact Mr. Wayne Harrison at (361) 972-7298 or me at (361) 972-7136.
There are no commitments in this submittal.
Scott M. Head Manager, Licensing awh/
NOC-AE-08002315 Page 3 of 3 cc:
(paper copy)
(electronic copy)
Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 612 East Lamar Blvd, Suite 400 Arlington, Texas 76011-4125 Mohan C. Thadani Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North (MS 7 D1) 11555 Rockville Pike Rockville, MD 20852 Senior Resident Inspector U. S. Nuclear Regulatory Commission P. 0. 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 Thad Hill Catherine Callaway Jim von Suskil 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