ML20086H343
| ML20086H343 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 09/22/1972 |
| From: | Rosalyn Jones VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086H319 | List: |
| References | |
| AO-50-271-72-05, AO-50-271-72-5, VYV-2253, NUDOCS 8401170031 | |
| Download: ML20086H343 (1) | |
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P.O.DOX 157 VERNON. VERMONT 05354
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.n United States Atomic Energy Cot =nission Directorate of Regulatory Operations, Region I 970 Broad St reet Newark, New Jersey 07102 REFERENCB : Operating License DPR-28 Docket No. 50-271 Abnormal Occurrence No. AO-72-05 Gentlemen:
An defined by Technical Specifications for the Vermont Yankee i
Nuclear Power Station, Section 6. 7. A.c, we are reporting the following Abnormal Occurrence as 40-72-05 and confirming our telephone conversation with your off ice on this date.
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During the af ternoon of September 21 with the reactor operating at approximately 151 power, the supply valve to the Off-Cas Sample Char:bar
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was f ound to be c!nced.
This prevented monitoring of the air ejector off-gau and constituted a violation of Technical Specifications, Section 3.8.A.1.
After discovery of the mis-pooitioned valve, it was-opened immediately and a tmnaurement was made using the installed cystem which ' indicated an
_I of f -ga.9 nctivity of 5 mr/hr. Additionally, a grab sample was taken which showed 145 yc/nec at the air ejectoro. The flow at that time was 15 cfm corresponding to a hold-up time of 300 minutes.
The stack monitor during thin period indicated essentially at background.
i The of f-gan monitoring nystem is currently operable in accordance with Technical Specif ications.
A review of this incident is beirg conducted.
Very truly yours, EM 01 1 / OO31 721101 rTI< ADOCK 05000271 VERMONT YANKEE NUCLEAR POWER CORPORATION PDR
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