ML20237K496

Notice of Violation from Insp on 870602-0731.Violation Noted:Redundant Chlorine Gas Detection Channels of Toxic Gas Monitoring Sys Had Nonconservative Setpoints at 7 Ppm from 860811-870723

ML20237K496
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/21/1987
From:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20237K478	List: IR 05000271/1987012 ML20237K475 ML20237K496 ML20237K522
References
50-271-87-12, NUDOCS 8708270195
Download: ML20237K496 (1)

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i APPENDIX A l

NOTICE OF VIOLATION Vermont Yankee Nuclear Power Corporation Docket No. 50-271 3 Vermont Yankee Nuclear Power Station License No. DPR-28 l Vernon, Vermont During an NRC inspection conducted on June 2 - July 31, 1987, a violation of NRC l requirements was identified. In accordance with the " General Statement Policy and  !

Procedure for NRC Enforcement Actions", 10 CFR Part 2, Appendix C (Enforcement l Policy 1986), the violation is listed below.

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Technical Specification 3.2.J was issued by Amendment 96 on August 11, 1986 )

and requires that the Toxic Gas Monitoring system be operable whenever the i control room is required to be manned, with trip settings as specified in I Table 3.2.7. Table 3.2.7 requires that a trip setting of 5 ppm be established I for the redundant chlorine gas detector channels. l Contrary to the above, for a period of plant operations from August 11, 1986 until July 23, 1987, the redundant chlorine gas detection channels of the toxic gas monitoring system had non-conservative trip setpoints at 7 ppm. j The control room was required to be continually manned during this period due l to the operational status of the plant.

It is noted that, subsequent to NRC inst.ection of the area on July 23, 1987, actions were taken by licensee personnel to establish 5 ppm trip setpoints {

in the redundant chlorine gas detection channels. l This is a Severity Level IV Violation (Supplement I.D.).

Vermont Yankee Nuclear Power Corporation is hereby requested to submit to this office within twenty days of the date of the letter which transmitted this Notice, a written statement in explanation in reply, including: (1) corrective steps that will be taken to avoid further violations; and (2) the date when full compliance l will be achieved. Where good cause is shown, consideration will be given to ex- l tending the response time. '

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8708270195 070821 PDR ADOCK 050g2 i G

0FFICIAL RECORD COPY DL50-271/87 0003.0.0 08/21/87 i