ML19105A207
| ML19105A207 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 09/15/1975 |
| From: | Stallings C Virginia Electric & Power Co (VEPCO) |
| To: | Goller K Office of Nuclear Reactor Regulation |
| References | |
| Serial No. 690 | |
| Download: ML19105A207 (2) | |
Text
.
VIRGINIA ELECTRIC AND POWER COMPANY
\\ \\r:-;~
RICHMOND.VIRGINIA 23261
/\\,Y "V
~
,,t0Cl<~i~
'()
i"'
usi-111.
Yi
~
1197S 7ffe g_
September 15, 1975.
on f-6
, (\\e1V.
/...-....
~O** 0*
~:
Mr. K. RI, IG~\\}, Assistant Director for 015e.Yc:d:ing Reactors Division of Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Connnission Washington, D. C.
20555
Dear Mr. Goller:
fJ\\~ cy;;,
Serial No. 690 PO&M/JTB:clw Docket Nos. 50-280 50-281 License Nos. DPR-32 DPR-37 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 fcir 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. 1 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 the: load on both units at the maximum permissible 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 to be the result of the river water temperature rising into the high SO~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.l, 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 meettng 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 0 cuu-'1.
VIRGINIA ELECTRIC AND POWER 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 interi~ basis 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.l in the near future.
cc:
Mr. Norman C. Moseley Very truly yours,
.J
'7, j{;(; /')' I-,,1,;.,-::.,,o/
-(.,,. - *' (_, (. ~- j({,(_.(:.,. *'"'* 'j.
C. M. Stallings Vice President-Power Supply and Production Operations