ML18136A231
| ML18136A231 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 11/26/1979 |
| From: | Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911290295 | |
| Download: ML18136A231 (1) | |
Text
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e VIRGINIA. ELECTRIC A.ND POWER COMP.A.NY RIOHMOND,VIRGINIA 23261 November 26, 1979 Mr. Darrell G. Eisenhut, Acting Director Division of Operating Reactors Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555
Dear Mr. Eisenhut:
Serial.No.
PO/RMT:baw Docket Nos.:
License Nos. :
965 50-280 50-281 DPR-32 DPR-37 This letter report is furnished in accordance with the provisions of Surry Power Station Technical Specification 4.14.C.l.
During the period from 1330 to 1430 on November 10, 1979, the condenser cooling water outlet temperature exceeded a temperature change rate of 3°F/hr. which is the maximum permitted by Technical Specification 4.14.A.3.
Unit 1 was operating at 100% power and Unit 2 was in cold shutdown during the occurrence.
This event occurred when an unusually high sodium content was noted in the condenser.
This sometimes indicates a tube rupture.
In the process of removing the suspected water box from service to isolate the problem, the temperature rate of change reached 3.4°F/hr.
It was later discovered that there were no tube ruptures but rather that a valve misalignment was permitting the fluid containing the sodium to enter this system from another source.
A search conducted to determine if the temperature change had affected the river environment revealed no detrimental evidence.
cc:
Mr. James P. O'Reilly Very truly yours,
- a. Jn ~d.d ~ayv C. M. Stallings Vice-President-Power Supply and Production Operations Aoo/
.S.
171 791129oa.c,s