ML19323E381

Interim Deficiency Rept Re Unqualified Insulation Repairs in Rockbestos Supplied Cable.Safety Implication Investigation in Progress.Final Rept Will Be Provided by 800916

ML19323E381
Person / Time
Site:	Grand Gulf
Issue date:	04/18/1980
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:
References
AECM-80-81, NUDOCS 8005230468
Download: ML19323E381 (2)

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1 t MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi C '

P. O. B OX 164 0, J A C K S O N, MIS SIS SIP F! 3 9 2 0 5 PRCOUCTION DEPARTMENT 2

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April 18, 1980 b

CD Office of Inspection & Enforcement cn U. S. Nuclear Regulatory Cocmission Region II 101 Marietta St., N.W., Suite 3100 ~

. Atlanta, Georgia 30303 ~

Attention: Mr. J. P 0'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 PRD-80/10, Status Report, Unqualified Insulation Repairs in Rockbestos Supplied Cable.

AECM-80/81 On March 21, 1980, Mississippi Power & Light Company notified Mr. M. Mendonca of the NRC, Washington, D. C., of a Potentially Zaportable Deficiency (PRD) at the Grand Gulf Nuclear Station con-struction site. The deficiency concerns unqualified cable insulation repairs in 600V cable supplied by Rockbestos.

An investigation was initiated into this matter after a similar problem was identified at the Palo Verde Nuclear Generation Station.

Our initial report of this deficiency to Mr. Mendonca indicated that cable splices were central to the GGNS deficienef,'as was the case at Palo Verde. However, our preliminary findings indicate that no cable splices were included in cable supplied to GGNS by Rockbestos.

The deficiency under investigation at GGNS pertains only to cable in-sulation repairs that were not qualified in accordance with IEEE g jr gr Standard 383. . p Currently, Rockbestos is conducting qualification tests on 5 j

materials utilized in the suspect repairs. Our investigation into j[f7 the extent of this deficiency and its safety implications is in progress.

8005230 M S .k.- .FFIca7, gng.

MISSISSIPPI POWER & LIGHT COMPANY Mr. J. P. O'Reilly, Director AECM-80/81 U. S. Nuclear Regulatory Commission Page two We expect to provide a final report and determination of re-portability on this issue no later than September 16, 1980. This investigation is being documented under Bechtel MCAR-GGNS No. 67.

Yours,truly, l

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L. F. Dale

/ Nuclear Project Manager JGC/JDR:ts cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. Victor Stello, Jr., Director Division of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 k

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