ML20086H172
| ML20086H172 | |
| 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 | |
| ML20086H174 | List: |
| References | |
| AO-50-271-72-17, VYV-2392, NUDOCS 8401160035 | |
| Download: ML20086H172 (1) | |
Text
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j VERMONT YANKEE NUCLEAR POWER CORPORATION l
SEVENTY SEVEN OROvc STREET l
l RUTLAND, WMIONT OG701 j
ftEPLY TO:
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VYV-2392
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VERNON VEriMONT oS354 ember 28, 1972
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i t-1 0 Director f)
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~l U.S. Atomic Energy Commission L
l Washington, D.C.
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REFERENCE:
Operating License DPR-28
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b al Occu e ce No. A0-72-17 b
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Dear Sir:
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-l As defined by Technical Specifications for the Vermont Yankee Nuclear Power Station, Section 6.7.B.d, we are reporting the following Abnornal Occurrence as A0-72-17.
At 0445 on December 22, 1972, during conduct of the monthly HPCI pump operability surveillance test, the gasket on the gland seal exhaust condenser failed. 'This cooler is required for proper operation of the HP,CI and its loss temporarily precludes the HPCI operability required by
'Section 3.5.E.1,a of Technical Specifications.
The reactor was operating at approximately 62% power at the time of this incident.
Replacement of the failed gasket was initiated immediately.
Concurrently, the operability verification required by Section 4.5.E.2 of Technical Specifications was initiated. The cooler was repaired and HPCI was verified operable at 1125 on the date of the occurrence.
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The Plant Operations Review Committee concluded that the cause of gJ jthe blown gasket was an overpressurization of the condenser due to an improper j
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/ setting of the HPCI PCV23-50. The pressure control valve was reset and locked j
in a position to prevent valve opening at a pressure greater than 40 psi and k
thereby prevent an overpressure condition in the condenser.
IIT jg Very truly yours,
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VER40NT YANKEE NUCLEAR POWER CORPORATION 0401160035 721228
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PDR ADOCK 05000271 S
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Plant Superintendent MFL/rpb 75 COPY SENT REGION ____-
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