ML20010A006

Status Rept 5 Re Potentially Reportable Deficiency Concerning Unqualified Cable Insulation Repairs in Cables Supplied by Rockbestos Co,Initially Reported 800321.Final Rept Will Be Provided by 811109

ML20010A006
Person / Time
Site:	Grand Gulf
Issue date:	07/31/1981
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-81-274, NUDOCS 8108100373
Download: ML20010A006 (5)

Text

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o MISSISSIPPI POWER & LIGHT COMPANY

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& (; RHelping Build Mississippi P. O .' 'B O X' 16,4 0, J A C K S O N . M l S S l S S I P P I 3 9 2 0 5 NUCLE AH PRODUCTON DEPARTMENT ,

Of fice of Inspection & Enforcement ('yb A U. S. Nuclear Regulatory Commission V FF g fN Region 11 101 Marietta Street, N.W.

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Suite 3100 lC ' . .G 0 71961 > ,r9 '

Atlanta, Georgia 30303 'l i u,umme umwana $

$ amenessat Attention: Mr. J. P. O'Reilly, Director N

Dear Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/10, Status Report No. 5, Unqualified Insulation Repairs in Rockbestos Supplied Cable AECM-81/274

References:

1) AECM-81/71, 2/18/81

2) AECM-80/311, 12/16/80

3) AECM-80/221, 9/16/80

4) AECM-80/81, 4/18/80 On March 21, 1980, Mississippi Power & Light Company notified Mr. M.

Mendonca of the NRC in Washington of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GCNS) construction site. The deficiency concerns unqualified cable insulation repairs in cables supplied by Rockbestos Company.

We are continuing our evaluation of this deficiency. Qualification tests for materials used in insulation repair are partially complete. A status report is attached. Our final report on this matter, which will include a determination of reportability, will be provided to you by November 9,1981.

Yours truly,

/

J. P. McGaughy, Jr.

KDS:seb ATTACHMENT Igff cc: See page 2 t 8108100373 810731 DR MOG OM Member Middle South Utilities System g

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Mr. J. P. O'Reilly AECM-81/274 i

NRC Page 2 cc: Mr. N. L. Stampley

, Mr. R. B. McGehee i Mr. T. B. Conner t

i Mr. Victor Stello, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 .

Mr. G. B. Taylor South Miss. Electric. Power Association l P. O. Box 1589 Hattiesburg, MS 39401 4

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Attachtant to AECM-81/274 Page 1 of 2 Status Report No. 5 for PRD-80/10

1. Description of the Deficiency Qualification of cable insulation repair material used on cables manufactured and supplied by Rockbestos Company is questionable. The insulating material used on the factory repair was dif ferent than that originally used on the cable and does not appear to meet the specification requirements of IEEE 323 or 383.

During evaluation of the deficiency, as it applies to products of other manufacturers, it was determined that the Kerite Company also may not have evidence of qualification testing of compounds used in factory insulation repair for cables supplied to GGNS. However, we have determined that no Kerite cable is utilized inside the containment, therefore LOCA qualification tests on factory insulation repairs are not required.

The deficiency is applicable only to Unit 1. It is not yet known if it applies to the NSSS vendor. .

At present, the manufacturer has not completed tests to determine the qualification of the cable insulation repair material. Until these tests are completed, safety implications and reportability under the provisions of 10CFR50.55(e) and 10CFR21 cannot be addressed. Also, the plant systems that are affected cannot be determined.

II. Approach to Resolution of the Problem Th= cause of the deficiency was use of non-qualified cable insulation repair material by Rockbestos. Corrective actions and actions to prevent recurrence will be determined af ter the results of the qualification tests on the cable insulation repair material are complete by Rockbestos.

III. Status of Proposed Resolution The cable vendor had stated to our Constructor that all tests would be completed by May 15, 1981. The tests were completed. However, we have discovered that they were not conducted to IEEE 323 or 383 requirements. Rockbes?ns Company is now required to conduct new tests to qualify the repair material. These tests should be completed by September 1,1981. The results of the test will determine if other actions are required.

IV. Reason Why A Final Report Will Be Delayed.

Rockbestos Company is still in the process of completing qualification tests.

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! Attachment to AECM-81/274 i

Page 2 of 2 V. Date When Final Report Will Be Submitted 1

f Depending on the outcome of the tests and their acceptability, we intend to submit a final report by November 9,1981.

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