ML18141A446
| ML18141A446 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 01/25/1984 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Varga S Office of Nuclear Reactor Regulation |
| References | |
| 026, 26, NUDOCS 8401300309 | |
| Download: ML18141A446 (2) | |
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 W. L. STEWART VICE PRESIDENT NUCLEAR OPERATIONS January 25, 1984 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation Attn:
Mr. Steven A. Varga, Chief Operating Reactors.Branch No.
Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Serial No. 026 PSE/NAS/lmf/0021N Docket Nos.
50-280 50-281 License Nos. DPR-32 DPR-37 SUPPLEMENT 3 TO AN AMENDMENT TO OPERATING LICENSES DPR-32 AND DPR-37 PROPOSED REDUCTION IN BORON CONCENTRATIONS SURRY POWER STATION UNITS l AND 2 In our letter dated September 13, 1983 (Serial No. 521), Vepco requested an amendment to Operating Licenses DPR-32 and DPR-37 to allow operation of Surry Unit Nos. l and 2 at reduced boron concentrations.
This letter provides, in Attachment 1, supplemental information in response to an informal request made by the NRC staff via telephone on January 10, 1984.
Should you have any further questions, please contact us at your earliest convenience.
Very truly yours, W. L. Stewart Attachment (1) Response to Core Performance Branch questions for the proposed reduction in boron concentrations for Surry Power Station cc: Mr. James P. O'Reilly Regional Administrator Region II Mr. D. J. Burke NRC Resident Inspector Surry Power Station 8401300309 840125 PDR ADOCK 05000280 p
PDR Mr. J. Don Neighbors NRC Project Manager - Surry Operating Reactors Branch No.
Division of Licensing Mr. Charles Price Department of Health 109 Governor Street Richmond, Virginia
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STEAMBREAK ACCIDENT. STATEPOINTS Hypothetical Break Credible Break With Power Without Power With Power Case A Case B Case C Core Heat 23.7
- 8. 1
- 4. 1 Flux,% of 2441 MWT RCS Pressure, 959 853 733 psia Loop A Inlet 398 276 460 Temp., °F Loop B Inlet 469 497 482 Temp., °F Core Boron 0.0 0.4 8.2 Concentration, PPM RCS Flow, 100 6.4 100 Reactivity,
.007
.003
.026
% delta K/K Time, sec. 201 250 395 DNBR
- 1. 93 2.00 5.4