ML18136A403

Ro:On 800108,while Unit 1 Was Operating at 50% Power,Cooling Water Outlet Temp Exceeded 3 F/Hour Change Rate.While Returning Unit 1 to Svc,Discharge Coolant Temp Increased to 7 F/Hour.No Temp Effects on River

ML18136A403
Person / Time
Site:	Surry
Issue date:	01/18/1980
From:	Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
043, 43, NUDOCS 8001220559
Download: ML18136A403 (1)

Text

e e VIRGINIA ELECTRIC AND POWER COMPANY RICB'.MOND,VIRO:XNIA. 23261 January 18, 1980 Mr. Darrell G. Eisenhut Serial No. 043 Acting Director PO/RVIT: baw Division of Operating Reactors Docket Nos. 50-280 Office of ~Tu.clear Pt.eactor Regulation 50-281

u. S. :Nuclear Regulatory Omnission License Nos: DPR-32 Washington, D. C. DPR-37

Dear Mr. Ei senhu t :

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

During the period fran 2200 to 2300 on January 8, 1980, the condenser cooling water outlet temperature exceeded a temperature change rate of 3°F/hr., which is the maxilIJ.IDl permitted by Technical Specification 4.14.A.3.,

Unit 1 was operating at 50% power and Unit 2 was in cold shutdown during the occurrence.

"While returning Unit 1 to service, the rate of change of the discharge coolant temperature increased to 7°F/hour. At the time, tli\U of four condenser water boxes were being investigated for leaks and were not available to dissipate the heat generated. The power level was held at 50% until the temperature rate of change of the discharged water returned to allowable limits.

A search was conducted to detennine if the tanperature change had affected the river envirol'lllent. No evidence of detrimental effects was found.

Very truly yours,

!f.)f/). ~e~7 C. M. Stal 1ings Vice-President Power Supply and Production Operations cc: Mr. James P. O'Reilly IIooi-ft' 5 1/o s §001220 5 o1