View source for PNO-II-92-019, on 920327,plant Automatically Tripped Due to Partial Loss of Offsite Power.Licensee Plans to Keep Unit Shutdown for 2-3 Days to Repair Faulty Rod Position Indication.State of Fl Was Not Notified

{{Adams
| number = ML20203F292
| issue date = 03/27/1992
| title = PNO-II-92-019:on 920327,plant Automatically Tripped Due to Partial Loss of Offsite Power.Licensee Plans to Keep Unit Shutdown for 2-3 Days to Repair Faulty Rod Position Indication.State of Fl Was Not Notified
| author name = Landis K
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| addressee name = 
| addressee affiliation = 
| docket = 05000302
| license number = 
| contact person = 
| document report number = PNO-II-92-019, PNO-II-92-19, NUDOCS 9712170339
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:.
                                                                 )  ' g hnWU 09 pg l$w'5l'
         ~                                                                                                                         ,
                                               .-                                           March 27, 1992                         I
                                                                                                                               ~l LREllMINARY NOTIFICATION IF EVENT OR UNUSUAL OCCURRENCE PN0-Il-92-19 e This preliminary . notification constitutes EARLY notice of events of P05SIBLE safety or                                -
public interest significance. The information is as initia11y received without verifi-cation or evaluation, and is basically all that is known by 'the Region II staff on this date.
FACILITY: Crystal River Unit 3                                    Licensee Emergency Classification:
Florida Power Corporation                                 Notification of Unusual Event Docket No. 50-302                                         Alert                              111 }
Crystal River Floi'ida                                    Site Area Emergency              L   I 1
    ~
General Emergency
                                                                         ~T ~Not Applicable               gkf S11 EJECT:    PARTIAL., LOSS.0FQFFSITEkOWER
     'Clrystal River Un'it 3 aut.omatically tripped at 1:08 p.m. today due to a partial loss of
    'offsite power.. The breaker; from the Offsite Power transformer opened, causing a loss of pher to both 4160 vcit engineered safeguards busses. A full reactor trip and turbine trip >
occurred, and'all . control rods incerted.                 Both Erwergency Diesel Generators started, and proper load shed and sequencing occurred.                    No Reactor Coolant Pumps tripped. Main steam 53fetier lif ted, ' and prest,urizer level / pressure remained within the normal band. The r-actor plant was stabilized, steaming to 4t# main condenser via steam dumps. Offsite g wer was restored to the engineered safeguards busses at approximately 4:15 p.m.
* parent cause was testing" of the "C" inverter causing a voltage perturbation on
: control power to the output breaker from the Offsite Power transformer. The Offsite ruwer transformer was powering both 4160 volt enginocred safepuards bussos, and non-safety luedrr wore powered from* ottier sources of offsite power (Aux 114ary Transformer                    and Startup Trans,former).                .-   -
                                                                                                   ~
                                                                                                     ~     -
The licensee plans to- keep the unit shut down for about 2 t-. 3 days to repair faulty rod position indicition." The State of Florida was not notified. The                        senior resident inspector was'onsite during the: event and responded to the control room.
* The lice'nsee plans to issue'a press release.                                      .,         ]
This. [nformation is current es of 4:30 p.m on March 27, 1992.                                     .
CONT, .T: K Landis - 841-5509
                                                                                                                    \            -
                                                                                                                      ''U.
DI'STRIBUTION:                          -
: s. .                                                               g' Orfe White                  M' land t!at'l Flint North.                Bank cido                  Reaions         MAIL TO:     DCS (Original IE 34) chairman Selin              IRM    ,;     .
Region I                     00T (Transportation Only)
Ccam.. Rogers               LSSA
                                              ~    '
Region II                                                     -
Comm. Curtiss               AE00                       Region III      FAX TO:      Chairman Selin Ccam. Femick .              NP.C Ops.Ctr,              Reg;cn IV                    OIG Comm. de Planque                                       Region V                     INPO OGC                                                                                 LICENSEE (Corporate)
OCA                         Nicholson Lane             Phillips B Hg
     ''A and site RE5                        ACRS                         RII Resident P
PM, NRR
./*                        .                                 ;
9712170339 920327                               "" " " ' ' ' " ~ " " " ' " ' ' " " * " ' '
PDR      18rE PNO-II-92-019          PDR                      _}}

{{PNO-Nav|region=II}}