ML20148H359

Notifiies AEC That Valve Wall Thickness Verification Program Has Been Completed.Discuusses Results

ML20148H359
Person / Time
Site:	Yankee Rowe
Issue date:	02/15/1973
From:	Vandenburgh D YANKEE ATOMIC ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20148H357	List: ML20148H353 ML20148H359
References
NUDOCS 8011180247
Download: ML20148H359 (2)

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YANKEE ATOMIC ELECTRIC .-

COMPANY

%nn.7 201URNPIKE RCAD. WESTBOROUGH. MASSACHUSETTS 01581 TELEPHOt4E 617 366 9011 January 15, 1973 United States Atomic Energy Cetmission 970 Broad Street .'

Newark, Neu Jersey 07102 Attention: . Directorate of Regulatory Cperatica Region I

References:

a) Operating License No. DPR-3 (Docket No. 50-29)

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b) USAEC 3ctter to Yankee dated June 22, 1972 c) Yankee letter to USAEC dated July 21, 1972 d) Yankac letter to USAEC dated September 19, 1972 c) Yankee letter to UEAEC dated Cctcher 12, 1972

Dear Sir:

We uich to inform you that uc have coroleted the valve uall thicknocc verification pregram at Yankee Rouc. The recults of the valve verificatica program may be summarized briefly ac folleus:

a) Tho'uall thicknecc of fifty-cix valvoc in the reactor ecolant

, pressure boua.dary at Yanhec Roue ucre ultrasenically neacured and the moacurements indicated that core chift had not .c curred in any of these valvec. li.aever, ultracenic moacurer.cnte ' ef tuo valves indicated arcac of the valvec uhich u1rc conc!dorc:1 to be belou the thicknocs requirements of Codo //!SI 316.5 Both of these valves ucre later determined to be accontabic under the provision of Reference (b). *thich allcus a r' duct. e ion in the uall thici nc .s if the trmnical prcporti.cc of the natcrial exccod the cpocificatica minimum by an amount cuffi-cient to c6rpencate for the meacared reduction in uall thich-

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b) Becauce of the cearco Crain ctructure in five of the ciP.t reactor ecclant locp icohticn valvec, uc were caly able to ultracenically r.cacure three of theco cast, stainlacc at:o) valvec. The uM racenic r mur r.ntc for'the th:ec "a]; -

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USAEC Directorate of Regulatory Operation T.cgion I, The documentation package for the valve verification program hits been fontarded to the p11nt and is available for your review at the plant sito.

Very truly' yours, YANKEE ATCMIC ELECTRIC CCIEldrf b% V D. E. Vandenburgh Vice Pre::ident IIFB/ah e

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