ML20086D892
| ML20086D892 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 01/15/1973 |
| From: | Riley B VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086D889 | List: |
| References | |
| AO-73-02, AO-73-2, VYV-2408, NUDOCS 8312050323 | |
| Download: ML20086D892 (1) | |
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WENNoN. WENISONT 95354 January.15;.1973
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United States Atomic Energy Commaission Direc'terate of Regulatory Operations Region I 970 Btoad Street-d Womerk, New Jersey.
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1 REFERENCEt. Operating License DPR Docket.M0. 50-271s Abnormal Occurrence No.-AO-73-02r Gentlemen As defined'by Technical Specifications for the Vermont' Yankee Nuclear
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Power Station, Section 6.7.A.c, we are repotting the following Abnornsi' i
occurrence as A0-73-01'and confirming'our teleph'ne conversation with your o
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office.
At 0415 on January 15, 1973.' the No.' l' fen on the west cooling, tower-i failed in the forward direction 'after completion of the deicing. cycle.r This -
particular fan and as,sociated' cooling tower cell are necessary.to.the cooling tower portion of the' Alternate Cdoling System and wust'be operable'whenever irradiated fuel fa in the reactor vessel and' reactor coolant temperature is' greater than 212'F as required by section 3.5.D'.T of Technical Specifications.
The reactor was operating at~ approximately.100% ' power at the time of tthe incident ~.
e After the failure, the diesels and'the service water sub-systems were checked for operability in compliance with' Technical" Specifications section 4.5.D.3, and found'to be satisfactory. This operability demonstration will be performed daily until repair is affected.
Initial investigation showed that there was a bearing failure in the reduction gear unit. Repair and return to normal' operation of the fan will be complete prior to January 22, 1973; It should'ba noted that the cell is currently in operation in the natural convection mode.
Very :truly ypuro6 VERENT YANKEE NUCGAR POWER CORPORATION.
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