ML19331A776

Interim Deficiency Rept Re Discrepancies Found in Electrical Penetration Assembly Inboard Terminal Boxes.Cause Not Determined.Insp Program Initiated & Nuclear Production Personnel Training Program Established.Next Rept by 790525

ML19331A776
Person / Time
Site:	Midland
Issue date:	03/30/1979
From:	Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
References
HOWE-106-79, NUDOCS 8007230807
Download: ML19331A776 (4)

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Flu Stephen H. Howell Senior Vnce President

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O Ceneral Of fices: 1945 West Pernell Road, Jackson, Michigan 49201 * (517) 788-0453 March 30, 1979 Howe 106-79 N' '4.

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Mr J G Keppler, Regional Director S Office of Inspection and Enforcement 2 W~-s\Nop '

US Nuclear Regulatory Cocmission Region III

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799 Roosevelt Road d'/

Glen Ellyn, IL 60137  %/ '@

t MIDLAND IiUCLEAR PLANT -

UUIT NO. 1, DOCKET NO. 50-329 UiIT NO. 2, DOCKET No. 50-330 ELECTRICAL PENETRATIC:N ASSEMBLY

Reference:

Letter SHHowell to JGKeppler; Midland Nuclear Plant - Unit No. 1, Docket No. 50-329; Unit No. 2, Docket No. 50-330; Electrical Penetration Assembly; Howe 16-79; dated January 15, 1979 The referenced letter and this letter are interim 50.55(e) reports concerning the discrepancies found in the inboard terminal boxes of Unit I!o.1 and 2 electrical penetration assemblies. The attachment to this letter provider the current status of the corrective actions being taken.

Another report, either interim or final, vill be sent on or before May 25, 1979

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Attachment:

1. Quality Assurance Program, Management Corrective Action Report, 2K AR-1, Report 26, Interim Report 2, dated

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l March 21, 1979 CC: Director of Office Inspection and Enforcement Att: Mr. John G. Davis, Acting Director, USNRC (15) l

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Director of Office of Management i Information and Program Control, USNRC (1) l l

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BCC: JLBacon, M-1085A

• BWMarguglio, JSC-220A WEBird, JSC-216B PAMartinez, Bechtel AA RLCastleberry, Bechtel AA DBM111er, Midland TCCooke, Midland WGMoring, Bechtel AA JLCorley, tiidland JNewgen, Bechtel-Midland .

LADreisbach, Bechtel-Midland MJSchaeffer, Midland W dibbs, IL&B File: 0.k.9 24 GEKeeley, P-lh h08B

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Attach =ent 1 -

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Bechtel Associates Professional Corporation

SUBJECT:

MCAR #26 (Issued 12/19/78) MO ;WrMCEE Electrical Penceration Assechlies, Inadaquate Wire .

Terminations hg l j INTERIM REPORT ~

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DATE: March 21,1979 O PROJECT: Consumers Power Company Y"" b% b,.g37 =

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Midland Plant Units 1 & 2 Bechtel Job 7220 g ep; j

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[ /7 Introduction This report is subciitted to advise regarding the interim status and course of action required pursuant to MCAR #26 and CPCo NCR M-Ol-4-8-107.

Descriotion of Discrepancy ,

Refer to interim epm.c No. 1, dated January 8, 1979, for a description of discrepancy.

Probable Cause Furt'ter investigation by the Bechtel Supplier Quality Representative .(SQR) has indicated that the equipcent quality verification docu= cat packages are in order and that all crimping tools were properly calibrated and have proper calibration documentation on file. The investigation also indicated that the training records for nuclear production personnel were not on file ~

as required. Other than the improperly filed training records, the investigation ,

did not disclose any specific reason why the randon check by the SQR did not uncover any discrepancies. The training records were subs,equently retrieved and found to be acceptable.

The supplier provided his assessment of the probable cause, could not identify -

any specific program breakdown, and maintains that the discrepancies are of a random nature. It was suggested that the failures may be duc, in part, to the type of ter=ination lug that was used. Compression type, ring-tongue terminals with insulated ferrules were specified and provided. The insulation _

sheath covers the criep and consequently =akes visual inspection difficult. All of the suppliers current orders utilize uninsulated ferrules.

Corrective Action The supplier has initiated a 100% inspection program of all terminations on all current and future nucicar projects and has established a special training program for all nuclear production personnel. This should prevent reocurrence for any potential add-on orders for Midland.

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Bechtel Associates Professional Corpo' ration HCAR #26 -

.Page 2 With respect to the assemblies at the site, the supplier has perforced a preliminary invest'igation and verified that the discrepancies, exist. The o supplier has agreed to send representatives to the site in April to complete a comprehensive inspection of all penetrations designated for Class 1E circuits and selected penetrations designated for non-Class 1E circuits. They propose to inspect all of the #10, 14, 16 and. 20 gauge wires in all penetrations. Any crimps which are found to be defective will be replaced. All of the 350 MCM, 4/0, #2 and 6 gauge wire will be inspected in all of the penetrations which are designated for Class 1E' circuits. If the crimps in these penetrations pass a hand pull test, all remaining penetrations with like wire sizes will be con-sidered acceptable. If discrepancies are identified, the sample size vill be increased accordingly.

Safety Imolication Refer to interim report No. I dated January 8, 1979, for a discussion of safety 1.aplications.

Forecast Date of C -rective Action The corrective actions are scheduled for completion in April, 1979.

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Concurrence by: /

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