ML18139B250

Ro:On 810406,condenser Cooling Water Outlet Temp Exceeded Max Average Rate of Change Permitted by Tech Specs.Lack of Svc Water Flow Believed to Be Contributing Factor.Search Conducted to Determine Temp Change Effect on River Environ

ML18139B250
Person / Time
Site:	Surry
Issue date:	04/16/1981
From:	Sylvia B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Varga S Office of Nuclear Reactor Regulation
References
250, NUDOCS 8104210357
Download: ML18139B250 (1)

Text

VIRGINIA ELECTRIC A.'fD POWER CoMPA.NY Rxc:JDJ:OND, 'Vx::HGUI' IA 23261 April 16, 1981 Mr. Harold R. Denton, Director Serial No. 250 Office of Nuclear Reactor Regulation NO/RMT:jmj Attn: Mr. Steven A. Varga, Chief Docket No. 50-281 Operating Reactor Branch No. 1 License No. DPR-37 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Denton:

This letter report is submitted in accordance with the provisions of Surry Power Station Technical Specification 4.14.C.l.

During the period from 1400 to 1500 on April 6, 1981, the condenser's cooling water outlet temperature exceeded the maximum average rate of change of 30F/

hr. permitted by Technical Specification 4.14.A.3. The average rate of change during this period was 3 l/2°F/hr, At the time of this event, Unit No. 1 was at cold shutdown and Unit No. 2.was at 40% power escalating to full power operation.

The lack of service water flow through Unit No. 1 is believed to be a major contributing. factor to this event, It should be recognized that all due care and caution were exercised during the power escalation.

A search was conducted to determine if the temperature change had affected the river environment. No detrimental evidence was found.

Very truly yours, Manager - Nuclear Operations and Maintenance cc: Mr. James P. O'Reilly s