ML15072A092

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Submittal of Updated Casa Grande Input for STPs Risk-Informed GSI-191 Licensing Application
ML15072A092
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 03/10/2015
From: Gerry Powell
South Texas
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NOC-AE-15003232, STI 34068078, TAC MF2400, TAC MF2409
Download: ML15072A092 (3)


Text

Nuclear Operating Company 1EMW It-ff South Texas Pro/ect Electric Generating Station P.O Box 289 Wadsworth, Texas 77483 March 10, 2015 NOC-AE-15003232 10 CFR 50.12 10 CFR 50.90 Attention: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 South Texas Project Units 1 and 2 Docket Nos. STN 50-498 and 50-499 Submittal of Updated CASA Grande Input for STP's Risk-Informed GSI-191 Licensing Application (TAC Nos. MF2400 through MF2409)

References:

1. Letter, G. T. Powell, STPNOC, to NRC Document Control Desk, "Supplement 1 to Revised STP Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Resolving Generic Safety Issue (GSI)-191", November 13, 2013, NOC-AE-13003043, ML13323A183
2. Letter, G. T. Powell, STPNOC, to NRC Document Control Desk, "Submittal of CASA Grande Code and Analyses for STP's Risk-Informed GSI-191 Licensing Application", February 13, 2014, NOC-AE-14003081, ML14052A053 The CASA Grande computer code was used in the analyses supporting Reference 1. This submittal transmits to the NRC updates to the CASA Grande computer input that were provided in Reference 2.

The updates to Reference 2 more accurately describe insulation applied to pipes and equipment consistent with as-built Computer Aided Design (CAD) models. Verification records of CASA Grande input files are maintained with the software vendor, Alion Science and Technology.

The attachment to this submittal provides the South Texas Project (STP) - specific input files for the staff s review and use. Attached is a CD containing the updated Reference 2 input that can be run in CASA Grande. It is recommended that (1) the input file and instructions provided in Folder 1 be reviewed for consistency with current staff analysis settings, and (2) all existing "master files" provided in Reference 2 be replaced with those provided in Folder 2.

There are no commitments and no proprietary information in this submittal.

STI 34068078

NOC-AE-15003232 Page 2 of 3 If there are any questions regarding this request, please contact Wayne Harrison at (361) 972-8774 or me at (361) 972-7566.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on:

zol G. T. Powell Site Vice President awh Attachment Non-Proprietary CD with two folders and the following content:

STP CASA Grande Input Deck - Updated (Folder)

InputDeckUpdatehistructions.txt Pump Case 01 CRN - Updated.txt STP Updated Master Files - Revised Straight Pipe and Equip Insul (Folder)

Master Concrete File.mat Master Equipment File.mat Master Frequency File.mat Master Grating File.mat Master Insulation File.mat Master Pipe File.mat Master Weld File.mat Master WP File.mat IN6

NOC-AE-15003232 Page 3 of 3 cc:

(paper copy w/o attachment except as shown)

Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 1600 East Lamar Boulevard Arlington, TX 76011-4511 Lisa M. Regner (w/attachment)

Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North (MS 8 G9A) 11555 Rockville Pike Rockville, MD 20852 NRC Resident Inspector U. S. Nuclear Regulatory Commission P. 0. Box 289, Mail Code: MN116 Wadsworth, TX 77483 (electronic copy w/o attachment)

Morgan, Lewis & Bockius LLP Steven P. Frantz, Esquire U. S. Nuclear Regulatory Commission Lisa M. Regner Michael Markley John Stang NRG South Texas LP John Ragan Chris O'Hara Jim von Suskil CPS Energy Kevin Pollo Cris Eugster L. D. Blaylock Crain Caton & James, P.C.

Peter Nemeth City of Austin Cheryl Mele John Wester Texas Dept of State Health Services Richard A. Ratliff Robert Free