ML19254D933

Second Interim Deficiency Rept Re Discrepant Terminal Block & Cracked Disconnect Lines

ML19254D933
Person / Time
Site:	Midland
Issue date:	10/22/1979
From:	Szabelski C CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML19254D931	List: ML19254D930 ML19254D933
References
HOWE-276-79, NUDOCS 7910300334
Download: ML19254D933 (2)

Text

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Bechtel Associates Professional Corporafion Attachment Howe-276-79

SUBJECT:

MCAR 32 (Issued 7/20/79)

States Terminal Block, Cracked Disconnect Links INTERIM REPORT 2 DATE: October 22, 1979 PROJECT: Consumers Power Company Midland Plant Units 1 & 2 Bechtel Job 7220 Introduction This report is submitted to provide the current interim status and current course of action required pursuant to MCAR 32 and Bechtel NCR 2362.

,_ Description of Discrepancy Refer to Interim Report 1 (revised) dated August 10, 1979.

Probable Cause Refer-to Interi= Report 1 (revise " for a description of potential causes of the cracked disconnect links. The actual cause for the.

failures has not been definitely determined; however, the manufacturing process and the type of material used in the process are now considered as the most probable primary causes.

Corrective Action To date, three meetings have been held among Bechtel, CPCo, and Multi-Amp Corporation (States) to determine corrective action as well as probable cause. These meetings proceeded in the following order:

Meeting No. 1 - September 19, 1979, at Bechtel's lutn Arbor Office between Bechtel and CPCo Meeting No. 2 - September 26, 1979, at the Midland jobsite between Bechtel, CPCo and Multi-Amp (S tates) .

4 Meeting No. 3 - October 16, 1979, at Multi-Amp's (States) Dallas head-quarters between Bechtel,. CPCo, and Multi-Amp (States) .

As a result of these meetings the following action items were acted upon:

1 ') 4 / 7 '.

8 7910300 3 3 I

A so - b Bechtel Associates ProfessionalCorporation Attachment

. Howe-276-79 MCAR 32 Interim Report 2 (

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October 22, 1979 '

i Page 2 .

1) CPCo initiatec a scarch of their records for their facilities to identify any othe- link failure of States terminal blocks. They found no extensive failure problems with the sliding links, only isolated cases.

2) Bechtel is develoning an inspection plan for determining the excent '.

of cracked links in the major equipment using States terminal blocks. The inspection activity is to be completed by the end of December, 1979.

3) States and CPCo independently conducted metallurgical f ailure analyses to determine the probable cause of the sliding link failures. Both CPCo and States have agreed to investigate, via additional metallurgical testing, the findings of each others' prc.lic.inary metallurgical analysis. As of this date, no conclusive results are available, since the additional metallurgical tests are not complete.

Safety Implication Refer to Interim Report 1 (revised).

Forecast Date for Corrective Action An exact date for the corrective action to be completed cannot be established until:

1) The cause of the cracks is deter.ained.

2) The inspection plan is implemented and all results are received and evaluated.

A schedule for completion of the corrective action will be provided in the next report.

Submittedby:d.lf ~

/~ O Approved by: l#c/,2. . /.cto . [.~1 Concurrence by: /

CS/j t n .. J

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