ML19274E706

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Interim Rept on Potential Reportable Deficiency Re Failed Type 12 Auxiliary Switch Assembly.Failed Switch Assembly & One Other Assembly W/Crack in End Moulding Were Returned to Supplier for Analysis.Will Submit Final Rept by 790530
ML19274E706
Person / Time
Site: Grand Gulf  Entergy icon.png
Issue date: 04/02/1979
From: Mcgaughy J
MISSISSIPPI POWER & LIGHT CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-79-29, NUDOCS 7904170199
Download: ML19274E706 (1)


Text

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u Helpin <j B uild Missis sipps JN 3 P. O. B O X 16 4 0, JdCKSON, MISSISSIPPI 39205 PRODUCTION D L P A H F tA L N T April 2, 1979 Office of Inspection & Enforcement U. S. Nuclear -Regulatory Co:=11ssion Region II 101 Marietta Street - Suite 3100 Atlanta, Georgia 30303 ATTENT10:::

Mr. J.

P.

O'Reilly, Director SUl3J ECT : Grand Gulf Nuclear 'tation S

, File 0260/15525/15526 Interim Report ';o. I for Potential Reportable De-ficiency No. 79/06 as Defined in 10CFR50.55(e)

AECM-79/29 on March 2, 1979, Mississippi Power & I.ight Company notified a

Mr. J. K.

Rausch of your office of a potential reportable deficiency at the Grand Gulf Nuclear Station construction site concerning the failure o f a Type I.2 Auxiilary Switch Assembly installed in the 4. 16

'V switch-y,ca r. Other switch assemblies of the same type installed equipment and sparen from stock were found to have cracked "end mouldings".

The f a iled swit ch assembly and one of the switch assemblies v'th a crack in the end moulding were returned to the equipment supplier for analysis.

The results of the analysis should enable us to make a final determination of reportability and submit a final report by May 30, 1979.

Yourn truly, c /

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[# J.

P. McGaughy, Jr.

Director of Power Production JRF:pa ec:

Mr. ".

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Stampley Mr.

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11. McGehee Mr. T.

13. Conner t.

Dr. Ernst Vo l f;ena u, Director

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Division of Inspection 6 Enforcement U. S. Nuclear Regulatory Commission

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b'ashington, D. C.

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7904170/1'/

Member Middle South Utilities System