ML18139B827

Ro:On 820212,w/Unit 1 at 100% Power & Unit 2 at Hot Shutdown,Average Rate of Change of Condenser Cooling Water Outlet Temp Exceeded Tech Specs.Caused by Failure of Vacuum Priming Sys at River Intake.Sys Repaired

ML18139B827
Person / Time
Site:	Surry
Issue date:	03/26/1982
From:	Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Varga S Office of Nuclear Reactor Regulation
References
186, NUDOCS 8204060064
Download: ML18139B827 (1)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND~ VIRGINIA 23261 March 26, 1982 R.H.LEASBl'.JRO V:xoE PRESIDENT NUCLE4.R OPERATIONS Mr. Harold R. Denton, Director Serial No. 186 Office NO/RMT:acm Attn: Mr. Steven A. Varga, Chief Docket No. 50-280 Operating Reactors Branch 50-281 Division of Licensing License No. DPR-32 U. S. Nuclear Regulatory Commissi DPR-37 Washington, D. C. 20555 Gentlemen:

During the period of 1345 to 1420 hrs., February 12, 1982, the average rate of change of the condenser cooling water outlet temperature was l2°F/hr. which exceeds the 3°F/hr. rate of change permitted by Technical Specification 4.14.A.3.

At the time of this event, unit one was at 100% power and unit two was at Hot Shutdown.

The failure of the vacuum priming system at the River intake substantially reduced the circulating water flow into the intake canal. Throttling of the flow through the condenser water boxes to preserve canal water level resulted in the temperature limits being exceeded. The vacuum priming system has been repaired and returned to service.

A search was conducted to determine if the canal temperature excursion had Vei/Xs, adversely affected the River Environment. No detrimental evidence was found.

R.H. Leasburg cc: Mr. James P. O'Reilly Regional Administrator Region II