ML20086D593
| ML20086D593 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 12/28/1972 |
| From: | Rosalyn Jones VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20086D587 | List: |
| References | |
| AO-72-16, VYV-2391, NUDOCS 8312020414 | |
| Download: ML20086D593 (1) | |
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VERMONT YANKEE NUCLEAR POWER CORPORATION SEVENTY SEVEN OROVC STRCCT
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RUTLAND, VERMONT 05701 REPLY TO:
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VYV-2391 P. O. BOX 157 VERNON, VERMONT o5354 4
December 28, 1972
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REFERENCE:
Operating License DPR-28
.d Docket No. 50-271
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Abnormal Occurrence No. A0-72-16
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Dear Sir:
j As defined by Technical Specifications for the Vermont Yankee Nuclear Power Station, Section 6.7.B.d, we are reporting the following Abnornal 1
Occurrence as A0-72-16.
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At 1938 on December 20, 1972 the No. 1 fan on the west cooling tower i
tripped. The fan failed after approximately a seven minute run in the reverse direction during deicing operations on the west tower. This particular fan and associated cooling tower cell are necessary to the
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cooling tower portion of the Alternate Cooling System and must be operable j
whenever irradiated fuel is in the reactor vessel and reactor. coolant 1
temperature is greater than 212*F as required by section 3.5.D.'l of
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Technical Specifications. The reactor was operating at approximately l
60% power at the time of the incident.
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Inmediately after the failure both diesels and both service water d
sub-systems were checked for operability in compliance with Technical Specifications section 4.5.D.3, and found to be. satisfactory.
Investigation showed that the motor overload heater had failed, g g
- 'j thereby severing power to the fan motor. The overload heate,r was g
replaced and the fan was returned to service on December 21.
The fan has been operating without incident since the repair and the Plant Operations-Review Committee concluded that no further action is necessary.
jg LN Very truly yours,-
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$DRh OCK 05000271 VE ONT YANKEE NUCLEAR POWER COPJ' ORATION l,
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Robert F. Jor s
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