ML20087C139

Ro:On 750802 & 03,condenser Cooling Water Discharge Temp Exceeded 98 F for More than 3 H.Caused by Rising River Water Temp.Util Requested & Was Granted Emergency Relaxation of Tech Spec 4.14.A.1 Effective Until 750806

ML20087C139
Person / Time
Site:	Surry
Issue date:	09/15/1975
From:	Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Goller K US ATOMIC ENERGY COMMISSION (AEC)
References
690, NUDOCS 8403120323
Download: ML20087C139 (2)

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Mr. K. R. Coller, Assistant Director Serial No. 690 for Operating Reactors PO&M/JTB:clw Division of Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-280 U.S. Nuclear Regulatory Commission 50-281 Washington, D. C. 20555 License Nos. DPR-32 DPR 37

Dear Mr. Goller:

This is to notify you in accordance with the Surry Power Station Technical Specifications of two incidents where the thermal limitations on the condenser cooling water discharge were exceeded.

On August 2 and 3, 1975 with both units operating at full power, the condenser cooling water discharge temperature exceeded 98 degrees F for more than the three hour limit stated in Technical Specification 4.14.A.l. On August 2, 1975 the condenser cooling water discharge temperature exceeded 98 degrees F fo'r five hours and 30 minutes and reached a maximum temperature of 100 degrees F. The initial action taken was to ramp-down on Unit No. I at the maximum permissible rate prior to reaching the three hour technical specifi-cation limit. On August 3, 1975 the condenser cooling water discharge tem-perature exceeded 98 degrees F for five hours and reached a maximum temper-ature of 99.5 degrees F. The initial action taken during this incident was to reduce ther load on both units at the maximun permissibic rate before reaching the three hour limit. In both instances there was no evidence of any environmental impact.

Analysis of the incidents have shown them t;o be the result of the river water temperature rising into the high 80's due to the abnormally higher than normal daily air temperature during that period. Also, one low level intake circulating water pump was out of service which may have amplified the situ-ation relative to the average condenser cooling water discharge temperatures.

On August 4, 1975 Vepco requested and was granted an emergency relaxation of TS 4.14.A.1, effective until August 6, 1975. (Letter dated August 5, 1975 Vepco to NRC, Serial No. 634 and two letters dated August 5 and 6, 1975 NRC to Vepco). On August 7, 1975 a meeting between Vepco and the NRC was held to discuss a further waiver of TS 4.14.A.1. On August 8, 1975 as a result of

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.o . . o VinointA ELectate Axp Powen COMPANY To Mr. K. R. Goller Page 2 this meeting, Vepco requested and was granted that TS 4.14.A.1 be waived on an interim uasis until September 20,1975 (letter dated August 8,_1975 Vepco

.to NRC, Serial No. 640, and letter dated August 15, 1975, NRC to Vepco). We ,

shall submit a proposed change to TS 4.14.A.1 in the near future.

Very truly yours,

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C. M. Stallings Vice President-Power Supply and Production Operations cc: Mr. Norman C. Moseley 1

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