View source for PNO-V-86-021, on 860423,cut Wire Identified in ESF Relay Cabinet.Investigation Underway to Determine If Wire Cut Deliberately or Accidentally.Cabinet Not Yet Energized

{{Adams
| number = ML20210K755
| issue date = 04/23/1986
| title = PNO-V-86-021:on 860423,cut Wire Identified in ESF Relay Cabinet.Investigation Underway to Determine If Wire Cut Deliberately or Accidentally.Cabinet Not Yet Energized
| author name = Miller L, Zimmerman R
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION V)
| addressee name = 
| addressee affiliation = 
| docket = 05000530
| license number = 
| contact person = 
| document report number = PNO-V-86-021, PNO-V-86-21, NUDOCS 8604290043
| 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-V-86-21           Date: 04/23/86 Thia preliminary notification constitutes EARLY notice of POSSIBLE safety or public int rest significance. The information presented is as initially received without varification or evaluation and is basically all that is known by Region V staff on thia date.
1   FACILITY: Arizona Nuclear Power Project Emergency Classification Palo Verde Unit 3                       Notification of Unusual Event
              -Docket Nos. 50-530                      Alert Site Area Emergency General Emergency
_x_Not Applicable

==SUBJECT:==
POTENTIAL TAMPERING INCIDENT.
At 5:30 PM on April 23, 1986, a contractor electrician vericying a jumper installation id;ntified a cut wire in an engineered safety features (ESF) relay cabinet in the outer pariphery of the Unit 3 Control Room. Unit 3 is in the early phase of preoperational tacting. The wire is safety related and is associated with the number 2 steam generator downcomer blowdown sample containment isolation valve (UV-226) which is designed to close en ceveral ESF actuation signals. At the present time the cabinet is not energized. The lictnsee is investigating the incident and has not yet determined whether the wire was cut deliberately or accidentally during construction activities such as wire termination cr wire strapping.
Tha licensee has issued a press release. The resident inspectors are closely monitoring th2 licensee's investigation.
Thio information is current as of 12:30 PM (MST) April 23, 1986.
CONTACT:      L. Miller, Jr.               R. Zimmerman FTS 463-3869                 (602) 386-5260 DISTRIBUTION H St.                MNBB     Phillips        E/W        Willste     Air Rights 3'   Mail:
Chairman Pa111dino EDO          NRR             IE         NMSS                      ADM:DMB Comm. Zech            PA                       OIA         RES                       DOT:Trans Only Comm. Bernthal        MPA                      AE0D Comm. Roberts         ELD L   Comm. Asselstine                Regions:
  .SECY INPO J.'IJ~ NSAC J,*.a */
ACRS                            Licensee:      ej.* ,2 '
CA                              (Reactor Licensees)              REGION V: FORM 211 PDR                             Resident Inspector _                   (Revised 3/14/83) 2 PNO-Vh43860423 86-021     PDR
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