ML19209D110

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Forwards Interim Deficiency Rept Re Rosemount 510 Trip Units Drawing More Current than Specified,Causing Inadequate Power Supplies
ML19209D110
Person / Time
Site: Grand Gulf  Entergy icon.png
Issue date: 10/02/1979
From: Dale L
MISSISSIPPI POWER & LIGHT CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19209D111 List:
References
0260-0498-15521, 260-498-15521, NUDOCS 7910190415
Download: ML19209D110 (1)


Text

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% ElcGu MISSISSIPPI POWER & LIGHT COMPANY E Helping Build Mississippi P. O. B O X 16 4 0. J A C K S O N M I S S I S S I P P I 3 9 3,0 5 e q _.

PmODUCTION DEPARTMENT m

C"3 .=.i;y b3 Office of Inspection & Enforcement October 2, 1979 [

U. S. Nuclear Regulatory Commission 3 (,k Region II E p 101 Nkrietta Street, N.W. , Suite 3100 .. 7 c, Atlanta, Georgia 30303 c.o 'T -

c.o -t.

Attention: Mr. J. P. O' Reilly, Director Desr Mr. O' Reilly: .

SUBJECT:

Grand Gulf Nuclear Station Bechtel Job No. 9645 File 0260/0498/15521 Interin Report for PRD-79/12

, as Defined in 10 CFR 50.55 (e)

AECM-79/110 On September 4,1979, Mississippi Power & Light Company notified Mr. ,V.

Brownlee of your office of a potentially reportable deficiency at the Grand Gulf Nuclear Station construction site. The deficiency concerns the Rosemount 510 DU Trip Units drawing more current than originally specified caustag the power supplies to be inadeounte. We have determined that this matter '.s re-portable within the meaning of 10 CFR 50.55 (e). Details of the later,t in-formation are described in the attached report.

Yours truly, L. F. Dale Nuclear Project Manager JRF/JDR:mic -

Attachment cc: Mr. N. L. Stampley Mr. R. B. McGehee .

Mr. T. B. Conner #'

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

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l <J 7910100 h Member Middle South Utilities System e) . OFFICLQ Copy

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