ML18153C861
| ML18153C861 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 12/20/1991 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML18151A895 | List: |
| References | |
| 91-746, NUDOCS 9201060268 | |
| Download: ML18153C861 (2) | |
Text
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 December 20, l99l U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Serial No.91-746 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 NORTH ANNA POWER STATION UNITS 1 AND 2 TIP/CECOR TOPICAL REPORT VEP-NAF-2 NL&P/JYR Docket Nos.
License Nos.
50-280 50-281 50-338 50-339 DPR-32 DPR-37 NPF-4 NPF-7 Enclosed for your review and approval is the Virginia Electric and Power Company's Topical Report VEP-NAF-2, "Reactor Power Distribution Analysis Using A Moveable In-Core Detector System and The TIP/CECOR Computer Code Package," November, 1991.
The attached report describes Virginia Electric and Power Company's TIP/CECOR computer code package as an alternative methodology to synthesize three-dimensional core power distributions. We currently use the INCORE code to perform this function.. However, INCORE does not have the ability to model the number of core axial regions that are required by the use of part-length flux suppression inserts. These inserts are planned for use in Surry Unit 1, Cycle 13 which is currently scheduled for Spring 1994. It is our intention to use TIP/CECOR for core power distribution monitoring and surveillance, core follow and methods development verification for both Surry and North Anna Power Stations.
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e The attached report has been reviewed by the Station Nuclear Safety and*
Operating Committee at each station. If you have any questions on the material in the report, please contact us.
Very truly yqurs,
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(CL_\\
W.l-~*
W. L. Stewart Senior Vice President - Nuclear Enclosure cc:
U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Suite 2900 Atlanta, GA. 30323 Mr. M. S. Lesser NRC Senior Resident Inspector North Anna Power Station Mr. M. W. Branch N RC Senior Resident Inspector Surry Power Station