ML20003B689

Status Rept 3,re Incorrectly Crimped Ite Imperial Control Circuitry Terminations in Engineered Safety Feature 4.16 Kv Sys.Deficiency Being Investigated.Final Rept Will Be Submitted by 810916

ML20003B689
Person / Time
Site:	Grand Gulf
Issue date:	02/17/1981
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-81-70, NUDOCS 8102250203
Download: ML20003B689 (3)

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] j] , MISSISSIPPI POWER & LIGHT COMPANY

• Helping Build Mississippi Emahleiddsang P. O . 8 O X 16 40. J A C K S O N. MlSSISSIPPI 39205

1. EE[=U.NcsEd*/r February 17, 1981 Office of Inspection & Enforcement U. S. Nuclear Regulatory Cocmission Region II 101 Marietta Street, NW Suite 3100 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reiily, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2

, Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/39, Status Report No. 3, ITE Imperial Incorrect Crimping AECM-81/70

References:

1) AECM-80/177, 8/1/80

2) AECM-80/276, 11/6/80 On July 3, 1980, Mississippi Power & Light Company notified Mr. R. Wright of your office of a Potentially Repittable Defi-ciency (PRD) at the Grand Gulf Nuclear Station (CONS) construc-tion site. The deficiency concerns incorrectly crimped ITE Imperial control circuitry terminations in the ESF 4.16 kv bus.

We are continuing ourinvestigation into this matter. We ex-pect to determine reportability and submit a final report by l September 16, 1981. A status report is attached.

Yours truly, J. P. McGaughy, Jr.

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• MISSISSIPPI POWER C Ll2HT COMPANY Mr. J. P. O'Reilly AECMv81/70

. NRC Page 2 e

cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Director Division of-Inspection L Enforcement U. S. Nuclear Regul'atory Counission Washington, D.C. 20555 Mr. G. B. Taylor

, South Miss. Electric Power Association P. 0.-Box 1589 Hattiesburg,.MS 394'1 0 4

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Attachment to AECM-81/70 Page 1 of 1 STATUS REPORT #3 TO PRD-80/39 I. Description of Deficiency ITE Imperial terminations were found to be crimped without any of the conductor strands in the lug barrel on approximately 75% of terminations checked in block terminals on the 15AA and 16AB busses in the ESF 4.16 kv System (R21) for Unit 1. (System R21 is the 4.16 kv Switchgear and Load Shedding and Sequencing Panels.)

II. Resolution of Deficiency Our investigation to date has determined that the cited deficiency would not have adversely affected the safety of plant operation.

However, we have determined that Grand Gulf Nuclear Station has additional equipment supplied by ITE Imperial. We will inspect all ITE switchgear for similar deficient conditions.

III. Status-The constructor is currently performing inspection of the addi-tional ITE equipment.

IV. Reasons for Delaying Final Report Inspections are not completed or evaluated. The NSSS Supplier applicability has not been determined nor evaluated.

V. Projected Final Report Submittal Date It is estinated that corrective actions will be completed and our

. final report submitted-by September 16,"1981.

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