ML20236V359

PN-75-077:on 750826,intentional Unauthorized Interchange of Electrical Cables Was Identified.Recorder Inputs for Ph/ Conductivity for SG Feedwater Was Found Reversed

ML20236V359
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/28/1975
From:	Jennifer Davis, Galen Smith, Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PN-75-077, PN-75-77, NUDOCS 9808030112
Download: ML20236V359 (1)

Text

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PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE August 28, 1975 PRELIMINAP.Y N0i1FICATION OF EVENT OR UNUSUAL OCCURRENCE --PN-75-77

( This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interect significance. The information presented is as initially received without verification or evaluation

> and is basically all that is known by OIE staff as of 11:00 a.m. on the date of this notification. IT SHOULD BE SPECIFICALLY NOTED THAT THIS NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO BE INACCURATE OR INCONSISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY WILL BE ISSUED IF WARRANTED.

Facility: Fort St. Vrain Public Service Company of Colorado

Subject:

Intentional Unauthorized Interchange of Control Room Panel Cables. >

Our Region IV (Dallas) Of fice was notified on August 27, 1975 that intentional unauthorized interchange of electrical cables by contractor personnel was identified on August 26, 1975. Initially the recorder inputs for the Ph/ conductivity for the steam generator feedwater was ,

found reversed. Investigation revealed eleven additional instances of cable interchange. The cable interchanges were located behj.nd,the Control Room panels and the licensee stated that no Reactor Safety m

~

~ System cables are involved.

The licensee has classified this incident as malicious mischief and k '" eight contractor personnel have been dismissed. The licensee indicated  !

that security and access requirements to vital areas have been upgraded, a functional test of process controls in the Control Room has been completed, and investigation to determine the existence of other similar j plant conditions is in progress.

The facility is presently shutdown for modification of the control rod I drives and inspection of electrical cable separations. Based upon preliminary data, we believe that the i= mediate safety implications are t minimal.

A Region IV investigator was dispatched to site on August 28, 1975.

This matter has been coordinated with the Office of the Agency j Inspector and Auditor. i m$ l

$ "" Region IV received notification of this occurrence by telephone l

@ from the Jicensee at 1545 hours0.0179 days <br />0.429 hours <br />0.00255 weeks <br />5.878725e-4 months <br /> on August 27, 1975.

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Contact:

GHSmith. IE x7261 HDThornburg, IE x7353 JGDavis, IE x7541 j

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{] % Distribution:y Chairman Anders Commissioner Mason S. J. Chilk, SECY d_ / .

oa: I Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE /

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• Commissioner Kennedy C. C. Kammerer, CA ,f L. V. Gossick, EDO D. F. Knuth, IE J. A. Harris, PA B. C. Rusche, NRR H. H. Brown, ISP T. J. McTiernan, AIA K. R. Chapman, NMSS H. K. Shapar, ELD .

Transmitted: P Bldg g c. W ; H St/ M 4 ; MNBB/d E x ; Luge p ,

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