ML20128D967

Informs That Encl Recommended Issuance of Bulletin Re Failure of Components in MSIV Control Sys at Plant.Believes That Bulletin Unwarranted

ML20128D967
Person / Time
Site:	Monticello
Issue date:	04/04/1974
From:	Grier B US ATOMIC ENERGY COMMISSION (AEC)
To:	Thornburg H US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20128D972	List: ML20128D967 ML20128D974
References
NUDOCS 9212070435
Download: ML20128D967 (2)

Text

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APR 4 1974 i

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11. D. Thornburg, Chief, Field Support and Enforcenent Branch F0 i 342 - C&O #314 The enclosure to the subject document reconnended issuance of a Dulletin relative to failure of components in the main steam isolation valve control systaa at honticello. The affected components were installed as part of a modification made in early 1973. The licensee, in reporting the failure, stated its belief that such failure might be generic. We

concur.

General Electric Company has reported the lionticello modification to Licensing in the form of Supplement I to APED-5750, with the statement that it is recouaending this modification to all its customers, and will routinely supply the modified design on all future facilities.

Licensing is currently evaluating the acceptability of this modification with a target date for decision of liay 1,1974. The llonticello occurrence is being considered in this evaluation.

To our knowledge, the only other facility which has made the Monticello modification is Cooper (we do not have information on H111 stone 1 and VermontYankee1).

I Under the circulastances, we do not believe that a Bulletin is warranted.

14e will keep you and the Regions infonned of the results of Licensing's evaluation.

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i O. H. Grier. Assistant Director for Construction & Operation i

Directorate of Regulatory Operations cc: G. Fiore111. RO:III D. L. Ziemann, L R. W. Reid L i

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70: D. H. Grier, R0 ISI.I.h ACT10j CONTR01, POP 4 A. Action Code F0il342 bYh ' f Narne of Licensee and haellity _ BilR racilities Docket No. or License No.

Title Failure of MSIV Pilo.LValves Origin .. Letter thver to O't eerv 2/25/74 Date Rec'd B. FS6ED Dranch Coordinator Bryan .X Dreher 11. D. Thornburg Ellis Pattluo C. Action Requested of ADRDT ,

M6PPOD EPB RPB ADC0 X OB s _

TAB 00E REGION Date Requested 3/19/74 Completion Requested by 3/27/74 Reference Memorandum. Fiorelli to Thornburg dated 3/13/74.

D. Action Requested: Please evaluate the licensees findings in the abnornal occurrence report as to whether or not they are generic and whether or not issuance of a bulletin is warranted. .

E. Date Action Completed Close-out (Date & Method)

Comments: If completion date is not consistent with your work schedule, please let us know.

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Lf LW th liarold D. biornburg, Chief (

l Field Support 5 Enforcement Branch i

Directorate of' Regulatory Operations l cc: J. C. Davis y p--sF m -

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