View source for PNO-III-85-094, on 851107,bypass Reactor Trip Breaker B Failed to Operate During Performance of Tests Per IE Bulletin 85-002.Cause Not Stated.Plant Restored to Condition in Which Both Main Reactor Trip Breakers Operable

{{Adams
| number = ML20198E544
| issue date = 11/07/1985
| title = PNO-III-85-094:on 851107,bypass Reactor Trip Breaker B Failed to Operate During Performance of Tests Per IE Bulletin 85-002.Cause Not Stated.Plant Restored to Condition in Which Both Main Reactor Trip Breakers Operable
| author name = Chrissotimos N, Jackiw N
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| addressee name = 
| addressee affiliation = 
| docket = 05000305
| license number = 
| contact person = 
| document report number = IEB-85-002, IEB-85-2, PNO-III-85-094, PNO-III-85-94, NUDOCS 8511140081
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:PRELIMINARY NOTIFICATION OF' EVENT OR UNUSUAL OCCURRENCE--PNO-III-85-94                 Date 11/7/85 M This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public int: rest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility: Kewaunee Nuclear Power Plant                    ' Licensee Emergency Classification:
Wisconsin Public Service                            Notification of an Unusua] Event Corporation Green Bay, WI 54305 Alert Site Area Emergency g
Docket No. 50-305                                   General Emergency X Not Applicable Subj ct: FAILURE OF REACTOR TRIP BREAKERS At 10:10 a.m. (CST), on November 7,1985, while performing tests on the "B" bypass reactor trip breaker pursuant to IE Bulletin 85-02, the breaker failed to operate. The unit was operating at 100% power at the time of the failure. A spare reactor trip breaker and the "A" bypass reactor trip breaker were successfully tested on November 6 and 7,1985 respectively.
Subsequently, the licensee tested the main reactor trip breakers. The testing resulted in
  -the failure of the "A" breaker and the successful passing of the "B" breaker. The licensee has restored the plant to a condition in which both the main reactor trip breakers are now
  . operable.
The licensee plans to conduct further testing of the failed breakers.
RegicnIIIspecialists(oneamemberoftheD.C.CookAugmentedIncidentResponseTeam)were cnsite during testing of the breakers and will continue monitoring the licensee's trouble-
* sh nting activities.
  -Regi:nIIIwasnotifiedofthiseventat11:00a.m.(CST)onNovember7,1985.NRRandIE hav] also been notified of this event.
Thisin'ormationiscurrentasof3:00p.m.(CST),
f                                               November 7,1985.
CONTACT:
Yrh N.'  Ja kiw       N . /C sso imos FTS 88-5697        FTS   8-5716 DISTRIBUTION:
H. St.                       ED0         NRR          E/W        Willste      Mail: ADM:DMB Chairman Palladino           PA                       IE         NMSS                 D0T:Trans only Comm. Zech                   ELD                     OIA         RES Comm. Bernthal                                       AEOD Conn. Roberts Conn. Asselstine             SP //.*/d_        Regional Offices ACRS SECY                         INP0d'A3                 NSAC L  IRO CA PDR                          RIIIResidentO}ffice Licensee:        L l J &p       (Corp. Office - Reactor Lic. Only) i Region III Rev. November 1985
                $11(0001851107
* 0-III-85-o94 pos
                                                                                                   $0f}}

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