ML20086E346
| ML20086E346 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 02/05/1975 |
| From: | Riley B VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086E261 | List: |
| References | |
| AO-75-03, AO-75-3, VYV-3642, NUDOCS 8312060464 | |
| Download: ML20086E346 (1) | |
Text
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v N..m VERMONT YANKMM NUCLEAR POWER CORI?OR ATION
'\\K SCVENTY SCVEN OROVC STRCCT RUTLAND, VP.ICMONT 05701 VYV-3642 P.O. BOX 157
.VCRNON, VCRMONT oS354 7.5C.
February 5, 1{ 2 % x D),
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Director ~
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United States Atomic Energy Commission 1
631 Park Avenue g {'.l, g /
King of Prussia, Pennsylvania 19406, A
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REFERENCE:
Operating License DPR-28 Docket No. 50-271
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Abnormal Occurrence No. A0-75-03 (24 Hour Report)
Dear Sir:
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f As defined by Technical Specifications for the Vermont Yankee Nuc1 car vnuar n e n H..n. nc,tfon 6.7. we are reporting the following Abuormal
. Occurrence as A0-75-03 and confirming our telephone conversation with l
.,your office.
At approximately 0930 on February 4, 1975, while performing a monthly.
functional tcat on the Core Spray System, the-Core Spray System Pump Discharge Pressure sensor PS-14-44A actuated at 82 psig.
Table 3.2.1 of the Technical Specifications requires that the trip level setting of tiiis censor be set at >100 psig.
Failure of this sensor to actuate at the specified trip level setting resulted in fewer operable instrument channels-per trip system than that required by Tabic 3.2.1 cf the Technical Specifications.
Functionally, this sensor operates as a pressure permissive
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in the Automatic Depressurization System indicating the fact that a core
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spray pump is running.
j The sensor was immediately replaced and the trip icvel setting adjusted
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'to,110 +5 psig which precluded the necessity of performing the ' action
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specified in Note 2 of Tabic 3.2.1 of the Technical-Specifications. The plant was operating at full power at the time of the discovery of this e
occurrence.
8312060464 750214 Very truly yours, r aoo" g.g 9 pf,q Bradford W. Riley.. c -
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Plant Superintendent T.
' HE/kbd 11913
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