ML19350C938

Interim Deficiency Rept Re Indeterminate Integrity of Mechanical Connections Used in GE Junction Boxes,Initially Reported on 810305.Final Rept by 810803

ML19350C938
Person / Time
Site:	Grand Gulf
Issue date:	04/03/1981
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-81-133, NUDOCS 8104100438
Download: ML19350C938 (3)

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- 1 A O D MISSISSIPPI POWER & LIGHT COMPANY

! Helping Build Mississippi P. O. B OX 16 40, J AC K S O N, MIS SIS SIP PI 3 9 2 0 5 T,UrNE'[ April 3, 1981

. ciir9 Office of Inspectiott & Enforcement ,h ,,

'O U. S. Nuclear Regulatory Commission ,g 'l Region II jg 101 Marietta Street, N.W. gr: -

C Suite 3100 83*,skl/$, / , god gg M,

Atlanta, Georgia 30303 {j Attention: Mr. J. P. O'Reilly, Director Q

Dear Mr. O'Reilly:

_]

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-81/19, Status Report #1, Mechanical Connections in GE Junction Boxes AECM-81/133 On March 5, 1981, Mississippi Power & Light Company notifien Mr. P. A.

Taylor, of your office, of a Potentially Reportable Deficiency (!!RD) at the Grand Gulf Nuclear Station (CGNS) construction site. The deficiency concerns the indeterminate integrity of mechanical connectfans used in GE junction boMes.

We expect to determine reportability and submit a final tenort by August 3, 1981.

Yours truly, gy J. P. McGaughy, Jr.

j EWC:mt Attachment ec: See page 2 d

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,- 3 MI'/AlfilPPI POWER O LICHT COMPANY Mr. J. P. O'Reilly AECM-81/133 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stallo, Director Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 ~

Hattiesburg, MS 39401 f

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Attachment to AECM-81/133 Page 1 of 1 STATUS REPORT NO. 1 FOR PRD-81/19 I. Description of the Deficiency This deficiency concerns wire terminations in junction bczes located in Power Generation Control Complex (PGCC) termination caMaets. The junction boxes, supplied by General Electric, have mechanical connections (screws which tighten onto the wire strands). The screws appear not to have full thread engagement on No. 8 AWG and smaller wire. ' The potential exists that the screws could become loose and/or damage to the conductors could occur. Initial evaluation showed that all plant systems could be affected.

II. Approach to Resolution of the Problem The vendor has been requested to evaluate this potential deficiency.

III. Status of the Proposed Resolution The vendor's evaluation as to the reportability of this matter under 10CFR50.55(e) has been received. The vendor has determined that the deficiency does not adversely affect safe operation of the plant.

MP&L's engineering group is evaluating the vendor's rationale to substantiate the determination of non-reportability.

IV. Reason Why A Final Report Will Be Delayed MP&L has not completed its review of the completed vendor evaluation.

V. Date When A Final Report Will Be Submitted We expect to submit a final report on this matter by August 3,1981.

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