ML20205N221

Notice of Violation from Insp on 860209-27.Violation Noted: Inoperability of Standby Liquid Control Sys from 840714-851003

ML20205N221
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	04/22/1986
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20205N186	List: IR 05000271/1986005 ML20205N221
References
50-271-86-05, 50-271-86-5, EA-86-058, EA-86-58, NUDOCS 8605010544
Download: ML20205N221 (1)

Text

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.f NOTICE OF VIOLATION Vermont Yankee Nuclear Power Corporation Docket No. 50-271 Vermont Yankee Nuclear Power Station License No. DPR-28 EA 86-58 During the performance of a test on February 8,1986, the licensee identified a violation of NRC requirements involving the inoperability of the Standby Liquid Control System. On February 9-27, 1986, an NRC inspection was conducted to review the circumstances associated with this violation. In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1985), the violation is set forth below:

Technical Specification Limiting Condition for Operation (LCO) 3.4.A requires the Standby Liquid Control System (SLCS) to be operable whenever fuel is in the reactor and the reactor mode switch is not in the shutdown position. Technical Specification LC0 3.4.B permits operation to continue in the existing mode for seven days if a redundant component of the SLCS is inoperable. Unless Technical Specification LCOs 3.4.A or 3.4.B are met, the reactor shall be in the cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Contrary to the above, from July 14, 1984 until October 3, 1985, while fuel was in the reactor and the reactor mode switch was not in the shut-down position, both redundant components of the Standby Liquid Control System were inoperable in that their explosive squib valves would not actuate, if required, to provide a flow path from the Standby Liquid Control System Storage tank to the reactor vessel. The reactor was not placed in the cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

This is a Severity Level III violation (Supplement I)

Pursuant to the provisions of 10 CFR 2.201, Vermont Yankee Nuclear Power Corporation is hereby required to submit to this office, within 30 days of the date of this Notice, a written statement or explanation, including-(1) admission or denial of the alleged violation, (2) the reasons for the violation if admitted, (3) the corrective steps which have been taken and the results achieved, (4) the corrective steps which will be taken to avoid further viola-tions, and (5) the date when full compliance will be achieved. Consideration may be given to extending the response time for good cause shown.

Dated at King of Prussia, Pennsylvania this day of April 1986 leR"iB8M 8t8 ggn PDR