ML20076M722

Responds to AEC 730122 Request Re Certain Details in Program for Valve Wall Thickness Verification Provided in .General Intention for Scope of Valve Wall Thickness Verification Is to Examine All 72 Subj Valves

ML20076M722
Person / Time
Site:	Monticello
Issue date:	02/20/1973
From:	Wachter L NORTHERN STATES POWER CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20024G283	List: ML20024G282 ML20076M722
References
NUDOCS 9102080494
Download: ML20076M722 (2)

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e N SIP NOHTHERN

$TATES POWER COMPANY M I N N E A f* O L. t le. M I N N E D OT A 59401 Febrairy Po,17/3 Mr Boyce H Crier, Regional Djrector ll D Atomic pnergy Cm.minaion Directorate of Reguititory Operationc, Region III 799 Roosevelt Road Glen Ellyn, Illinoic 60137 Ibar lir Grier:

MONTICELLO IfJCIJ1R GFIWNiTIN3 PIAfff AEC D0%ET NO 30-263 VALVE WAIL 'DlICKliESS VERITICATION _

'lhis letter is in reply to your January P2,1973 inquiry regarding certain detalla in our program for valve vall thicknesc verification cubmitted to you in our November 3,1972 letter.

4,1972 letter Specifich13y,. you question whether paragraph three of our Aucuat inferred an intention to une a statistieni campling plan for the adection of In reviewL'c this velves for which verification measurements vould be made.

correnpandence ve precume your question was actually in reference to pe-agraph three of our Havenber 3,1972 letter.

Cur general intention for the ceppe of the valve vall thickneca verification program is to examine all of the 72 subject valves, but not all these valves are to be examined durind the 1973 major outage.

Ihring the portion of the progrnm to be condacted in this out. age ve intend to examine the 32 valvec listed in our 8,1972 3etter, and additiorn1 valves na might afford a reasonable November representration of valve type and manufacturer within the remainder of the 72

'lhe total scope of the progr6m in intended to be completed valvec of interent.

concurrent with additional In Service Inspection Program work in future major ou tacen.

FEB 2 0 B73 9100000494 */304PO PDR ADUCK ODOOOr63 P

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N O R *T,. E R N GTATEG POWEIR Coi, 'ANY lir Boyce H Grier

-P-February PO, 1973 We hope this clarif'ication enticf tec the quentiono you ruiced in your January P2, 1973 letter.

An evnluntion of the renul ts of the cxaminations tc; be made during the 1973 mjor outoge my of cource have nn influence on the scole of the prograin no presently intended; however, ve vill advice you of any cinnificant change to these planc.

Yours very truly, L J Wachter, Vice Precident Ibver Production & System Operation IJW/ma i

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