ML20072G288

Part 21 Deficiency Rept 80 Re Damaged Insulation on MCC Powers Co Shielded Multiconductor Cable on HVAC Control Panels.Also Reported by MCC Power

ML20072G288
Person / Time
Site:	Limerick
Issue date:	06/01/1983
From:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-83-916-000 10CFR-50.55E, PT21-83-916, PT21-83-916-000, SDR-80, NUDOCS 8306280417
Download: ML20072G288 (1)

Text

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• a PHILADELPHIA ELECTRIC COMPANY 23O1 M ARKET STREET P.O. BOX 8699 UN 1 1983 PHILADELPHIA. PA.19101 JOHN S. KEMPEP VfCE# RESIDENT ENGsNEE R7NG AND RESE ARCM Mr. Thomas E. Murley, Director Office of Inspection and Enforcement Region I United States Nuclear Regulatory Commission 631 Park Avenue K1ng of Prussia, PA 19406

Subject:

Significant Deficiency Report No. 80 MCC Powers HVAC Control Panels Limerick Generating Station, Units 1 & 2

Attachment:

Letter MCC Powers to USNRC dated April 18, 1983 File:

QUAL 2-10-2 (SDR #80)

Dear Mr. Murley:

The attached letter has brought to our attention a deficiency in the MCC Powers HVAC Control Panels concerning damaged insulation on shielded multiconductor cable.

This deficiency has been previously reported to the USNRC under the provisions of 10CFR, Part 21.

We consider the deficiency described in the attachment as a sig-nificant deficiency per 10CFR50.55(e) and are hereby notifying you as required.

We believe that the MCC Powers report submitted under the provisions of 10CFR, Part 21 provides the information required for 10CFR50.55(e) reporting.

In addition, the rework recommended by MCC Powers has now been completed on the Limerick panels.

Consequently, we anticipate that this letter will be our only report to you on this subject.

Sincerely,

/ 5.%M Copy to: Director of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, DC 20555 i

S. K. Chaudhary, USNRC Resident Inspector

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8306280417 830601 PDR ADOCK 05000352

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APR 211983 li'i April 18, 1983 t

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l Nuclear Regulatory Commissio.4 Office of Inspection and Enforcement-Washington,- DC 20555 Director,' Offh.ce of Inspection and Enforcement.

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' Title 10 Code o'f' Federal Regulations Part 21 Gentlemeni

. MCC Powers has datermined that a construction defect exists

- regarding shielded multiconductor cable. installation in NSR HVAC Control Panels supplied by. MCQ Power's.'fype';.at,tached list.

i During the installation of this cable, when the extez or cTtivering wa's removed, the insulation of various separate conductors has been damaged due to cutting too deeply into the covering material.

The demaged insulation may possibly

'cause a loss of or reduced output of cignal from the asso-

- ciated instruments if the wiring were subjected continuously

.to a high moisture atmosphere, therefore should be repaired or reworkei.

..e The inforLation;that the' defect does exist at' tlie LaSalle Station was obtained on April 15, 1983 and verbally trans-mitted to I-u. 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 sufficient 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 __

l installed over the defect.

This material is qualifi.ed,.tY"tT6 % & E Manufacturer to IEEE-323-1974 and IEEE-384-1974.

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

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