ML19093B347

Reporting Occurrence of Cooling Water Temperature at Discharge Control Structure Exceeded Average Rate Change of 3 Degrees F

ML19093B347
Person / Time
Site:	Surry
Issue date:	01/03/1977
From:	Rusche B Virginia Electric & Power Co (VEPCO)
To:	Rusche B Office of Nuclear Reactor Regulation
References
405
Download: ML19093B347 (1)

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' ~guratory Docket VIRGINIA ELECTRIC .A.ND POWER COMP.A.NY le l RIOHMOND, VIRGINIA 23261 January 3, 1977 Mr. Benard C. Rusche Serial No. 405 Director of Nuclear Reactor Regulation PO&M/ALH:dgt

u. s. Nuclear Regulatory Commission Washington, D. C. 20555 Docket Nos. 50-280 50-281 Attn: Mr. Robert W. Reid, Chief License Nos. DPR-32 Operating Reactors Branch 4 DPR-37

Dear Mr. Rusche:

In accordance with Technical Specification 4.14.C.l for Surry Power Station, this report describes an occurrence during which the cooling water temperature at the discharge control structure exceeded an average rate change of 3 degrees F.

On December 26, 1976 from approximately 1945 to 2045 hours0.0237 days <br />0.568 hours <br />0.00338 weeks <br />7.781225e-4 months <br /> the rate of change of the water temperature at the discharge control structure was 4 degrees F per hour.

The station status at the time of the event was Unit No. 1 at shutdown for refueling outage and Unit No. 2 was maneuvering for power escalation.

The immediate corrective action was to stop the load increase. The cause of the event was a combination of the following conditions: Two of Unit No. 1 condenser water boxes open for maintenance,and power escalation was being performed manually in the critical start up region of the turbine generator.

Very truly yours, ti;. }J1. 0/dca/;,r/*

c. M. Stallings Vice President-Power Supply and Production Operations cc: Mr. Norman c. Moseley, Director Office of Inspection and Enforcement 1.32