ML110670533
| ML110670533 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/04/2011 |
| From: | Harrison A South Texas |
| To: | Dyer J NRC/OCFO, Document Control Desk |
| Hudson, Sharon M./OCFO | |
| References | |
| NOC-AE-11002650, STI: 32832265 | |
| Download: ML110670533 (3) | |
Text
March 4, 2011 NOC-AE-11002650 File No.: G25 10 CFR 170 STI: 32832265 Chief Financial Officer (CFO)
U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Request for Fee Waiver as Risk Informed Pilot Plant
References:
- 1. Letter dated 9 December, 2010 from Ed Halpin to Chairman Jaczko, Letter to NRC Commissioners Regarding GSI-191 Status. (ML103481027, NOC-AE-10002625)
- 2. Staff Requirements Memorandum (SRM) dated 23 December, 2010, Closure options for Generic Safety Issue-191, Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance. (ML103610102).
In the referenced letter STP Nuclear Operating Company (STPNOC) proposed to submit a risk informed approach consisting of comprehensive and robust probabilistic models of phenomena related to the sequence of events from a postulated pipe break to the recirculation phase of sump strainer performance.
STPNOCs proposed application will apply risk insights to calculate the changes in risk, including Core Damage Frequency (CDF) and Large Early Release Frequency (LERF), from the actual plant configuration with debris generating insulation installed and with it removed. STPNOC provided additional detail regarding the proposed risk informed approach during public meetings on 27 January, 2011 and 22 February, 2011. This detail included the project team makeup, the phenomena to be modeled, the codes to be used for the modeling, and how the results and associated uncertainties would be integrated.
NOC-AE-11002650 Page 3 of 3 cc:
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(electronic copy)
Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 612 East Lamar Blvd, Suite 400 Arlington, Texas 76011-4125 A. H. Gutterman, Esquire Morgan, Lewis & Bockius LLP Mohan C. Thadani U. S. Nuclear Regulatory Commission Mohan Thadani Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North (MS 8 G14) 11555 Rockville Pike Rockville, MD 20852 John Ragan Catherine Callaway Jim von Suskil NRG South Texas LP Senior Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 289, Mail Code: MN116 Wadsworth, TX 77483 Ed Alarcon Kevin Pollo Richard Pena City Public Service C. M. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704 Peter Nemeth Crain Caton & James, P.C.
C. Mele City of Austin Richard A. Ratliff Texas Department of State Health Services Alice Rogers Texas Department of State Health Services