ML20024G282
| ML20024G282 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 04/20/1973 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wachter L NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20024G283 | List: |
| References | |
| NUDOCS 9102080479 | |
| Download: ML20024G282 (1) | |
Text
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DIRECTOR ATE OF REGULATORY OPERATIONS o'Wes v '[
t Rt.OlON lil 799 ROOSEVELT ROAD TaupHONE OLEN ELLYN ILLINOIS 60137 19141886 2660 April 20, 1973 Northern states Power Company Docket No. 50-263 AT118: Mr.1,0o Wachter, Vice President Power Production and Systen Operation 414 Micollet Hall Minneapolis, Minnesota
$5401 Centlemen Thank you for your letter of February 20, 1973, in response to our letter dated January 22, 1973, both concerned with your progran to verify that t
valves important to nuclear saf ety, installed in the Monticello Nuclear Generating Plant, have wall thicknessen consistent with applicable codes, standards, and purchase specifications.
In view of the information contained in your February 20 letter, and our understanding that valve wall thicknesses will be verified by ultrasonic testing techniques, we have no further quoetions. liowever, we will review the results of your valve verification progran during future site inspec-tions and, based ou these results, it may be necessary that we reevaluate the adequacy of the program.
Your cooperation with us is appreciated.
Sincerely yours, l
Soyce H. Crier Regional Director bec w/Itr dtd 2-20-73:
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MIN N C A POLID, MIN N E W OT A 99405 February 20, 1973 4
Mr Boyce H Grier, Regional Director U S Atomic Energy Commiccion Directorate of Reguintory Operations, Region III 799 Roosevelt Road Glen Ellyn, Illinoic 60337 Ekar Mr Grier t MONTICl:LLO NUCLEAH GElfEIMTING PIMI' i
AEC DOCKET NO 30-263 VALVE WALL TlUCKNESS VERIFICATION Thin letter ir, in reply to your January 22, 1973 inquiry regarding certain details in our program for valve vall thickness verifiention cubmitted to you in our November 3,1972 letter.
Specifically, you question whether porograph three of our August 8,1972 letter inferred an intention to use a r.tatistical campling plan for ke celection of valves for which verification measurements vould be made.
In reviewing this correcpondence ve precute your question was actually in reference to paragraph three of our November 3,1972 letter.
Oar general intention for the ceope of the valve vall thickness verification program is to examine all of the 72 subject valves, but not all these valves are to be examined during the 1973 major outage.
Iuring the portion of the program to be conducted in this outage we intend to examine the 32 valves listed in our November 8,19'(2 letter, and additional valves as might afford a reasoncble representation of valve type and manufacturer within the remainder of the 72 valvec of interes t.
The total scope of the program $ s intended to be completed concurrent with additional In Service Inspection program work in future major outagec.
FEB 2 61973
NORT.ERN OTATES POWER Coi.. 'ANY lir boyce !! Grier
-P-February PO, 1973 k'e hope this einrifiention r.ntinfies the quentionc you roiced in your January P2, 3973 letter.
An evaluation of the resulta of the examinatione to be rode during the 1973 nnjor outoge nny of cource have nn influence on the scope of the program as precently intended; however, ve vill ndvice you of any nignificant einnge to these planc.
Yourt very truly, f$Y L J Wachter, Vice Precident Ibver Production & System Operation IJW/w4
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