ML18113A706
| ML18113A706 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 11/29/1978 |
| From: | Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7812200169 | |
| Download: ML18113A706 (1) | |
Text
e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND,VIRGINIA 23261 Nov~mber 29, 197a Mr. Victor Stello, Jr., Director Division of Operating Reactors Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Conunission Washington, D. C.
20555
Dear Mr. Stello:
Serial No. 672 PO/LAJ:scj Docket Nos:
50-280 50-281 DPR-32 DPR-37 License Nos:
COOLING WATER DISCHARGE TEMPERATURE CHANGE RATE This letter report is furnished in accordance with the provisions of Surry Power Station Technical Specification 4.14.C.1.
During the period 1600 to 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br /> on November 18, 1978, the Condenser Cooling Water Outlet Temperature to the James River decreased by 3.5°F as measured at the station discharge structure. This temperature rate is in excess of the rate of 3*°F per hour permitted by Technical Specifications 4.14.A.3.
During this period, both units were at a steady power level.
The vacuum priming on the Unit No. 1 water boxes was placed in service, causing an increase in cooling water flow through the condensers.
Subsequently, the discharge temperature decreased 3.5°F. Evolutions of this nature will be more closely controlled in the future to preclude a recurrence.
A search was made for evidence that the temperature change rate experi-enced had affected the river or its inhabitants.
No evidence of any detri-mental affects were found.
cc:* Mr. James P. O'Reilly Director, Region II Very truly yours,
~)/)?.~~~
C. M. Stallings Vice President-Power Supply and Production Operations