ML20074A319

Part 21 Rept Re Defect in Shielded Multiconductor Cable Installed in HVAC Control Panels.All Suspect Panels Inspected & Nonconformance Rept Will Be Issued for Applicable Sites

ML20074A319
Person / Time
Site:	Clinton, LaSalle, 05000000
Issue date:	04/18/1983
From:	Fauconneau G MARK CONTROLS CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20074A311	List: ML20074A310 ML20074A319
References
REF-PT21-83 NUDOCS 8305120484
Download: ML20074A319 (2)

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April 18, 1983 Nuclear Regulatory Commission Of fice of Inspection and Enforcement ,

Washington, DC 2055"i Attention: Director, Of fice of Insp:.ction and Enforcement .

Subject:

. Title 10 Code of Federal Regulations Part 21 Gentlemen: -

MCC Powers has determined that a construction defect exists regarding shielded multiconductor cable installation in NSR HVAC Control-Panels supplied by MCC Powers. See attached list.

During the installation of this cable, when the exterior covering was removed, the insulation of various separate c:ntactors has been damaged due to cutting too deeply into the covering material. .The damaged insulation may possibly cause a loss of or reduced output of signal from the asso-ciated instruments if the. wiring were subjected continuously to a high moisture atmosphere, therefore should be repaired or reworked.

The information that the defect does exist at the LaSalle Station was obtained on April 15, 1983 and verbally trans-mitted to Mr. Harvey Westcott of the NRC Region Three office the same day.

MCC Powers has had all of the suspect panels inspected and is in the process of issuing NCR's for the applicable sites.

MCC Powers is currently engaged in construction at the Limerick and Clinton sites and has informed all applicable site construc-tion Quality Assurance Managers of the problem.

MCC Powers is recommending that if suf ficient excess cable is available in the panel that the defect be removed and the cable be reterminated. If there is insufficient cable available then a Ray Chem type WCSF-N shrink-on insulating material is to be installed over the defect. This material is qualified by the Manufacturer to IEEE-323-1974 and IEEE-384-1974.

As a third alternative, a replacement of the affected cable may be accomplished.

U O ohoy j4 'C POWERG A UNIT OF MARK CONTROLS CORPORATION 10 West F argo Ave . Sk.okee. ll 60077. (312) G77-9500

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April 18, 2983 Nuclear Reghlatory Conmission Director, Office of Inspection and Enforcement As any additional information i =: developed, P.CC Powers will advise all adressees.

Sip *7ely, gy., y _ -

Guy Fauconneau Vice President SLC l encl .

cc: J. Keppler - NRC Region 3 T. Quaka - CECO LaSalle M. Byers -

Baldwin Assoicates Clinton

. T. M. Gwin - B.P.C. Limerick A. W. Mahlum *

-'_ R. A. Neary

. -J."A. Harmon W. A. Roberts ,.

R. N. Miller J. Stefanik R. Althof C. Meece D. Erickson

.. p MCC POWERG A UNIT OF MARK CONTROLS CORPORATION

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ENCLOSURE w jgth,n April 18, 1983 Nuclear Regulatory Cc:U.ission FACILITY PANEL LaSalle Nuclear Station, Unit 1 1PL24J Clinton Nuclear Station OPL39JA OPL39JB 1PL43JA 1PL53JA 1PL53JB 1PL53JC e

1PL54JA ,

lPL54JC .

IPL61JB 1PL65JA 1PL65JB 1PL65JC 1PL68JIs Limerick Generating Station OCC101

'0DC101 OAC124 OBCl24 OCC124 10C207 1BC208 1CC208 1DC208 OAC588 OBC 588 1AC253

- 1BC253 OAC254 OBC 254 10C234 MCC POWERG A UNIT OF MARK CONTROLS CO!4PORATION

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