View source for PNO-IV-85-063, on 851206,reactor Inadvertently Tripped.Caused by Operator Incorrectly Initiating Steps of Surveillance Tests on Control Element Assembly Calculators.Cold Shutdown Planned to Replace Reactor Coolant Pump Seals

{{Adams
| number = ML20138J497
| issue date = 12/10/1985
| title = PNO-IV-85-063:on 851206,reactor Inadvertently Tripped.Caused by Operator Incorrectly Initiating Steps of Surveillance Tests on Control Element Assembly Calculators.Cold Shutdown Planned to Replace Reactor Coolant Pump Seals
| author name = Gagliardo J
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION IV)
| addressee name = 
| addressee affiliation = 
| docket = 05000382
| license number = 
| contact person = 
| document report number = PNO-IV-85-063, PNO-IV-85-63, NUDOCS 8512170537
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
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December 10, 1985-F ~ 7$ '                           .         -
                              ' PRELIMINARY-NOTIFICATION dF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-85-63 lk                 y r                                         .
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This' preliminary notification constitutes EARLY notice of events'of POSSIBLE                               e safety or public interest significance. The information is as initially received without1 verification or evaluation, and is basically all that is known
                              =by the Region IV staff on this date.
FACILITY:'                                e           Licensee Emergency Classification:                    ,
Notification of Unusual Event Louisiana Power & Light Company.
                           >lWaterford 3                                                     Alert Taft; Louisiana!                                            Site Area Emergency Docket No. 50-382             _
General Emergency -       '
                                                       .         q-                      X   Not Applicable 3                     

==SUBJECT:==
 ' INADVERTENT REACTOR TRIP FROM 100% POWER
                                                                                ~
i                      Waterford '3 was tripped froin 100% power on December 6,1985, at 6:19 p.m. due to_ operator e'      r ror. - The'~ operator caused the trip by incorrectly initiating the' 4                     1 steps of_ surveillance tests on the control element assembly calculators and                            '
g>                       thus established the two of, four trip logic. The licensee has decided to
         @                      _ proceed,to cold shutdown to replace one or more reactor coolant pump seals and
                                .an RTD associated with the Core Protection Calculator. Shutdown is expected to
_~
E                       last 6 to 10idays, depending on the number of seals replaced. This PN is
            >                     issued for information only and no further action is anticipated.
M                   '
Neither'the' licensee nor the-NRC plans to issue a press release.
The state of Louisiana-has been informed.
Region IV' received notification of this occurrence by telephone from the
  ~%                            ' resident inspector.at .9:00 a.m. , December 9,1985.
   *p                                             J.eE. Gagliardo, FTS 728-8141 9                    . CONTACT:
      -%                          DISTRIBUTION:                                                                                       ,
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                                . Chairman Palladino E00                       IE            NMSS         DOT:(Transonly)
N                     . Cone. Zech                     PA           01A           RES
             $- e                 Conn. Bernthal
                                .Com. Roberts ELD MPA AE0D-VIB FAX:
THF0 9               Com. Asselstine                                                           NSAC If              ACRS                            Phillips                                  RRI SECY                            NRR                                       SP           (Ai r M;s                          CA 3
DCS                                               :    Rights)        '
' '                                                                                                         LICENSEE:
J.              PDR Regional Offices-                                        (ReactorLicensee)
   "                               RIV:DRSP                       RA     h RDMartin EHJohnson/lk gt/p/85                       j t / d/85
;     .                     ,          .                                                                                         4;
          .                          8512170537 851210 PDR    I&E                                                                               -
P NO-IV-85-063 PDR 4}}

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