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2). Ishtar S I Esse 11 to J G Esppler; 3tidland 3han3aer Plant - Imat as 1, neekst so 50-3aps mit so a mocket En 50-330; 'jMestrieel Penetration assembly; Essed-79; dated, ..

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~ nearch 12,1979 ,,

The referessed lettere are asteria 50 55(e) reports. This letter is thet,

final 50 55(e) report aa==== sat =v the diaeropent terminstamos found in thee in.tomed teaudsel homme of Units me 1 and 2 elastrieel peastranica essemblies.

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vire terministians located in.the penetration assemblies inboard; terminal-

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to the supplier's acceptance , test procedure'. . Electrical testaf,wer,e :'. , rendenly witnessed by Bechtel'SS. fall verificatima documents, insleding" -.

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1he artsping tools which were used for the Midland work were enhjected ' -; to tegular enlibratiam shacks'and pull tests to verify am11bration. .

... ~ 7ta11 tests were rendenly ud*=====d by Bechtel SQR. Tha equipment- -''

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MCAR 26Page 3 .

7 Group 3) All EPA's used for Non-class 1E circuits with f 6 AWG, #2 AWG, -#4/0 AUG, and 350 MCM terminations.

-

The 18 non-inspected EPA's contain like terminations as those of GroupThese EPA's are used for Non-class 1E circuits and were to be included3.-

in'the inJpection plan if the results of the inspection on Group 3i

indicated the need.

"'he inspection consisted of a visual exami2ation and a " pull test" .~'conducted in the following manner:

.

The " pull test" consisted of grasping the conductors at aThepoint adjacent to, but not tou,ching, the lug barrels.,

conductors were manually, and individually, pulled by the_ , , -representative to ensure that the terminations were securely qcrimped.

,,

- ,

.

All testing and rework was vitnessed by Bechtel Quality Control personnel- |in addition to partial surveillance by Bechtel Electrical Field Engineeringand Consumers Power Company Quality Assurance personnel.

The results of the inspection are:".

A) -74 EPA's were inspected 17,714 terminations total.

B) No unsatisfactory terminations were found in 54 EPA's - 12,631' terminations total. _

'

C) Unsatisfactory terminations were found in 20 EPA's - 93 unsatis- '.

factory terminations out of 5,083 terminations total."

Based on the total terminations of "C", the percent of unsatisfactory ,terminations is 1.83%. However, based on the total terminations'of allthe inspected EPA's .("A"), the percent of unsatisfactory termidations is

; 0.5252.

No improper terminations were found in the EPA's of Group 3, therefore, ,-|it was determined :that no additional inspection would be required.for

, , the 18 EPA's that contained like terminations.

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MCAR 26'

Page 4.~

' . . 'f During the April'30,1979 -through May 3,1979 inspection all unsatisfactory~ ~" terminations were reworked and passed further inspections and pull-

tests. In. addition, all terminations were' checked for:

1) Proper type of lug. '.,,2) . Proper. lug indentation.3) Tightness to terminal blocks. i

As process corrective action the supplier has initiated a 100% inspections .program consisting of, _ visual inspection, pull testing, and continuity |

'

testing for all terminations on all current and future nuclear projects 1

and has established a special training program for all nuclear productionpersonnel. This program has been initiated as of April 24,1979 andtherefore should prevent iteoccurrence for~any potential add-on order: ;.for Midland. H,

Safety i.mplication, , ,

If this condition had gone undetected, the ability of the EPA to perform !,'

its intended safety function may have been compromised. Therefore, this jcondition was determined to be reportable. -

Submitted by: M /./ f' lz, ,MeQ_Approved by /w ,

Concurrence by: ..4.-

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