View source for PNO-I-86-047, on 860706,alert Declared When Sabotage Suspected as Possible Cause for Initiation of Diesel Generator Bldg Fire Suppression Sys When Water Deluge Valve Opened.Caused by Failed Heat Sensor.Alert Terminated

{{Adams
| number = ML20199L823
| issue date = 07/07/1986
| title = PNO-I-86-047:on 860706,alert Declared When Sabotage Suspected as Possible Cause for Initiation of Diesel Generator Bldg Fire Suppression Sys When Water Deluge Valve Opened.Caused by Failed Heat Sensor.Alert Terminated
| author name = Collins S, Norrholm L
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| addressee name = 
| addressee affiliation = 
| docket = 05000354
| license number = 
| contact person = 
| document report number = PNO-I-86-047, PNO-I-86-47, NUDOCS 8607100020
| 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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DCS No:         150354 860706 Date:
July 7, 1986 PRELIMINARY NOTIFICATION'0F " EVENT dR UNUSUAL OCCURRENCE--PNO-I-86                                                                                                                                                                                                      -
                                                                                                 ~
This preliminary notificati:en~ constitutes EARLY notice of events of POSSIBLE safety,.
or public interest significance. The information is as initially received withotat                                                                          -
verification or evaluation,''and is basically all tha.t is known by the Region I staff o~n this date.
o Facili ty':           Public S6rvice ETectric                        L.icensee Emergency Classification:                                          .
and Gas Com'pany                              -
                                                                                         ' Notification of Unusual Event                                                                               '
Hope C_ reek Nuclear                             X        Alert Generating Station                          .          Site Area Emergency                                         .
Hancocks B. ridge, NJ                         ,
General Emergency                                                         .
                         . .(DN 50-354)                                                   trot Applicable

==Subject:==
ERRONEOUS SUSPICION 0F EOUIPMENT TAMPERING                                  .                                                        _ . ,       .
At 6:30 p.m. on July-6, 1986,.the licensee declared on Alert when sabotage,was                                                                                         ,
considered a possible cause for initiation of the Diesel Generator Building fire suppression system which resulted when an air operated water deluge valve opened and the electric fire pump, started, pressurizing the s3rinkler system and fire hoses in the
       - Diesel Generator, area.                  No water was released since the fusible links in the sprinkler
                                                                                                                                                                      ~*
   .      heads remained intact.
Moredeta[ledinvest'igationandsystemtroubleshcotingrevealedthatthesystemhadnot been manually initiated, but an area detector (nea . sensor) nac failed and caused the system to initiate. The Alert was terminated at 7:30 p.m. or July .6.1986.
I        The licensee is r'esponding to media inquiries.                                                                        . .
                                                                                                                                                                                            .t i_ 'ine States'of New Jersey and Delaware have ceen informed.
CONTACT:           L. Norrhoim                             S. Collins                                                      .              ~
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                                                   .                                                                  (Reactor Licensees) 3 Region I Form 83                                                                                      '
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(Rev. July,1984)                                                            j
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8607100020 860707 PDR         I&E PNO-I-86-047              PDR                                                                                                       y
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