ML20037B271
| ML20037B271 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, Zion  |
| Issue date: | 09/13/1972 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| Shared Package | |
| ML20037B272 | List: |
| References | |
| NUDOCS 8009100848 | |
| Download: ML20037B271 (2) | |
Text
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UNITED STATES J.j. (.'
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ATOMIC ENERGY COMMISSION d
DIRECTORATE OF REGULATORY OPERATIONS
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REGION lil
- hits t' 799 ROOSEVELT ROAD TELEPHONE GLEN ELLYN, ILLINOIS 6o137 (312)858 2660 Septc=ber 13, 1972
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Comonvcalth Edi, son Corpany Lochet To. 50-10 ATT;i: !!r. Lyron Lee, Jr.
Dochet No. 50-2')7 Ascistaat to the Frcsident Decket No. 50-249 I
P. O. Box 767 Dockct No. 50-254 Chicago,, Illinois 60690 Docket Io. 50-265 Dochet 1:o. 50-295 Doci:ct !!o. 50-304 Gentlenen:
Thank you fer ycur;1etter dated Aur,ust 14, 1972, in renponce to cur letter dated June 29, 1972, inforcing us of your positdon rich rerpcet to our request for verification that valves inportent to nucicar cafety, iristalled or to be inctslied at the above identified facilities, recct the =ini: tun vall thichness require = ente of the cpecified codes or standards.
With respect to the ccm cats and inforration'containcd in your Aur:urt 14 letter, wa:
(1) agree that a requirencnt for 2% accuracy vich ultrasonic incpcetion ncthods could be considered to be unrealictic, and (2) cchnoul-edge that the infonution contained in Para:;raph thrce of the lettcr.
identifying c valve well thfchness vcrification prc:;r.c to be inpicacntcd in conjuncti:n uith the Zion facility, is corrcet. Uc point out, however, that our letter cf June.29 supplcrcntS our previouc ccrrenpondence with respect to thic natter cnd contains c requect for verificction of velve vall thicknesses in terr. of specific qualitative end quancitative consid-crctiona not previously idcutified.
As a result of our revicu of your August ~14, 1972 letter, it appears tiint you have not responded adequately to our concern in that the letter decs nct deal directly with Paragraphs thrce, fcur, and five of our June 29, 1972, letter. Specifically:
(1) your letter relctes to cast valves only and, thereby, appearc to exclude forced valven. and (2) the letter does not deal with valvc cices cs identified in cur Jenc 29, 1972, 1ctter.
Uith respect to forged vcives, additiencl information is provided cc followc:
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Coanonven1th Edison Cor.pany 2-September 13, 1972 Forced valyca ovc.; l-inch noninal pipe af:c for preenurized water reactors, over lh-inch no$1nal pipe size in vctep linco for hoflig c:ter rencacrs, cnd over 2's-inch ncainal pipe nine in ocean linco for boilipa vator rcnc-tors, may bn czcluded from wall thickneca verification rec,ufrencnta provided that:
(1) docu=entation is availabic at the site to confirn that valve dinencienn ucro checked after final nachining of nachined arens, and/or (2) valve drawiny,s are availabic at the nite to denonrtrate that any internal nachining operationa could not have encroached upon the ninimum unli thickness of the precsurc-rctaining boundry of the valve body.
In view of the foregoing, please reexaninc our Junc 29, 1972, letter and provide us in writing, within 30 days, with additional information cn> your plans so that we may cake further evaluation of this matter.
Your cooperation with un is appreciated.
Sincerely yours,
/
Boyco E. 'rier G
a Regional Director bcc w/ltr dtd 8/14/72:
J. B. Henderson, R0 R. H. Engelken, R0 H. D. Thornburg, RO G.
'n'. Reinmuth, RO J. G. Keppler, RO P. A. Morris, RO A. Giambusso, L R0 Files DR Central Files PDR Local PDR NSIC DTIE l
.