ML20086H815

Ro:On 911120,unscheduled Shutdown Conducted Due to Failure of Safety Channel 2 Circuit on 911119.Possibly Caused by Problem in Safety Channel 2 Meter Circuit.Permission to Restart Not Yet Sought

ML20086H815
Person / Time
Site:	05000083
Issue date:	11/20/1991
From:	Vernetson W FLORIDA, UNIV. OF, GAINESVILLE, FL
To:	Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20086H810	List: ML20086H808 ML20086H815
References
NUDOCS 9112090421
Download: ML20086H815 (1)

Text

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ATTAC!DiENT I

', NUCLEAR ENGINEERING SCIENCES DEPARTMENT

" Nuclear Reactor Facility University of Florida CG.Yamareen, Dmossor WCAAS 2ACTCe suaDNG

% % mu m, o m.im.w..um Potential Tech Spec Violation -

Safety Channel #2 Circuit Failure November 20,1991 U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W.

Suite 2900 Atlanta, GA 30323 Attention: Stewart Ebneter Regional Admirustrator Re: University of Florida Training Reactor Facility License: R-56, Docket No. 50-83

Dear Sir:

As per our telephone conversation of 20 November 1991 with Mr. Ed McAlpine relative to an unscheduled shutdown conducted due to failure of Safety Channel #2 Circuit for the UFTR on 19 November 1991, we have concluded this occurrence is a potential abnormal occurrence and a potentially reportable occurrence per UFTR Technical Specifications, Section 6.6.2 delineating requirements for special reports and per SOP-0.6, Section 3.2.3.3.3 indicating certain safety system failures are promptly reportable. The RSRS Executive Committee has not yet met as a group but individuals have been notified and have recommended NRC notification as per Section 6.6.2 of the UFTR Tech Specs though the' event may not be required to be promptly reportable depending on interpretation of the Tech Specs. Initial evaluation indicates the problem may be in the Safety Channel #2 meter circuit which recovered to normal indicaHcet about 20 25 seconds

after the shutdown was commenced. RSRS permission to reste ;

tas not yet been sought A but is expected to be dependent on a satisfactory completior of the daily checkout when the 4

cause of the failure is corrected if the failure is in the meter circuit as suspected.

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91120?Q421 911120 William G. Vernetson --

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PDR Director, Nuclear Facilities 1 WGV

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! cc: R. Piciullo ""~~~

RSRS