ML20003C016
| ML20003C016 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/23/1981 |
| From: | Olson R L BALTIMORE GAS & ELECTRIC CO. |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8102260435 | |
| Download: ML20003C016 (3) | |
Text
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B A LTIMORE GAS AND ELECTRIC l
CHARLES CENTER. P.O. BOX 1475 BALTIMORE, MARYLAND 21203 February 23, 1031 ELECTRIC ENGINEERING DEPARTMENT Office of Nuclear Reactor Regulation U. S. Nuclear Retrulatory Cornission Washington, D. C.
20555 Attn:
Mr. Robert A. Clark, Chief Onerating Reactors Branch #3 Division of Licensing
Subject:
Calvert Cliffs Nuclear Power Plant Units Nos. 1 & 2, Dockets Nos. 50-317 & 50.318 Spent Fuel Racks Modification, Sunnlenentary Information
Reference:
BG&E letter from A. E. Lundvall Jr. to 2
Roberi; A. Clark dated 1/29/81; same cabjcet.
Gentlemen:
A telenhone conference call was held on 2/19/81 bctvecn nenbers of your staff, RG&E and Nuclear Energy Services, Inc. to dir. cura certcin aspects of the design of the Calvert Clif fs suent fuel racks, nrecifically the use of a spot velding urocedure for fabrication of the rr.eks and the identification and resolution of possible defective snot veldt..
In the.t conversation, your staff requested that we provide a cony of our engir.ecring approval of the spot veldine procedure. We vere also reauccted to provide an explanation of our analysis to determine the extent of dcf(6 tive apot velding.
s Attached is a cony of our letter of 5/21/80 noa M. C. Ety to R. A. Milos of NE approving the use of the snot ve] ding moce.6 ore.
As discussed with your staff, an exnlanntlon oi 1,ht technique used to evaluate the racks for defective snot velds is providt.d in Euclosure 2 of our letter of 1/29/81 (see Reference).
Very tru]y yourr.,
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May 21, 1930 Mr. R. A. Milos Nuclear Fnerry Services, Inc.
HTS Divisicn Shelter Rock Pond Danbury, CT 06310
Subject:
Calvert Cliffs Nuclear Pover Plant Spent Fuel Pool Modification FCR 77-1002, P.O. !'o. 33203-GX Dear r.
Milos :
Procedure "o.
_ Title _
QC-PPS-203-5 Liquid Pe=etrant Testing QC-PPS-219-5 Cas Tungsten Arc Welding QC-PPS-233-3 Gas Metal Arc Welding QC-PPS-2 7-2 Autonatic Gas l'.etal Arc Welding WC-PPS-44 1 Arc Spot Velding QC-SIP-255-0 Inspection of Puel Storage Racks I:NG-FPS-2!.h-1 Pabricatien of Nuclear Puel Storace Rachs The procedures listed above have been revieved by BOLE and l
approved with con =ents en Proc. No. QC-PPS-219-5 as follova:
Page 2 - Par. 7 0 Process - indicatos using 1/8" - 3/16" diameter 2%
thoriated tungsten electrodes.
Pare 5 W.P.S. - q'i h0h indicates 1/8" - 3/16" diancter electrodes.
Page k Sketches and Veldtnr Parencters Table - 3/16" dia eter electrode in not listed. 3/32" dicEcter electrode is not listed for 3/8" metal thichness or 170 n=ps and 13 volts.
i Page 6 - P.Q.R. - QW hoh indicates a 3/32" die = ster electrode was used for the P.Q.R. and QW h09 indicateu 170 a=ps and 18 volts using D.C.S.P.
There is nothing vrong with using a 3/32" diencter 2% thoriated l
tungsten electrode at 170 anps as used in the P.Q.E. because this electrode l
is good up to 250 a=ps on direct current, straight polarity (DCSP), but it conflicts with the specification and velding perc=cter table on pace 4.
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f' Mr. P. A. Milco -
May 21, 1980 Che veldin procedure srecification (S.P.S.) is intende.1 to provi r' ' the velder with the directions he needs to veld in accordance with.he Co le and ohn11 be available for refere..:e by the velders c.nd the authorized inspcetor. She contradiction in thja procedure could cause problena.
If you have further questions, please contact me.
Very truly youra, waa w<na av 1% G b2 Christine Key Engineer McK/s :n tec: "essrs. R. F. Ash / File J. J. Jones L. E. Titland C. ". Linthicun J. L. I;1rduskey L. A. Sundquist i
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