ML18057A230
| ML18057A230 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 05/18/1990 |
| From: | Brian Holian Office of Nuclear Reactor Regulation |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| References | |
| TAC-76069, NUDOCS 9005220382 | |
| Download: ML18057A230 (6) | |
Text
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Docket No~ 50-255 UNITED STATES
- NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 May 18, 1990
. MEMORANDUM FOR:
John A. Zwolinski, Assistant Director for Region II I "THROUGH:
.~..
FROM:,
SUBJECT:
Division of Reactor Projects - III, IV, v*.and Special Projecfs Office of Nuclear Reactor Regulation Do~inic C~ Di Ianni, Acting* Project Director Project Directorate III-1
.. Division *of Reactor Projects - III,.
IV, V and Special Projects Office of Nuclear React6r Regulation Brain E. Holian, Project Manager Project Directorate III-1.
.Divisibn of Reactor rrojects - III, IV,*V and Special-Projects Office of Nuclear Reactor Regulation
SUMMARY
OF MEETING ~JITH CONSUMERS PO,WER *COMPANY, PALISADES,..
.AND BECHTEL -.KWU ALLIANCE
. STEAM GENERATOR REPLACEMENT PROJECT (TA(* 760~9)
A meeting was* held in Chattanooga, Tennesse~ on April 26, 1990 at the 6ffices cf Univetsal Testing L*boratcries to discuss a relatively new automatic
. ~ielding process - Narrow Gap Welding.
F1ve staff personnel {a mi)(_ of Proje.cts**
and Materials.. & Chemical Erig-inet:ring Brarth) listened.to a presentation of the.. *
~arrow Gap ~eld method and obseived a demonstratio~ of the proces~ in the
. Univers&l Testing Laboratories workshop. is-* the list of
- attende*es at the;*n:eeting.
The Narrow Gap_ Meld *process,_ ~sed Of! nun_1er9u_s_ ~ur~Re(!n_ NucJe.ar Facilities
. since *1985,. is* ~ilated. to *be used in its first U.S. application during the Palisades Steam Generator Replacement Project this winter. A total of te~
primary coolant.piping cuts are planned to be weldr:d *using the Narrow _Gap
- t'method..
Narrow Gap.weldi~g has the following advantages*ov~r. ~anual arc welding:
o.Reduced. weld volume and weld time
- o. A ~maller heat-affected zone res~lt{ng.in a reduction in shrinkage
- {which can_ be condOcive to cracking) o Automation of the welding operations o Even production of root, thereby fa~ilitating Ul o
Const~nt quality and reproducibility of ffiechanical properties of the welded joint 9005220~~~ 90Q~i§ ~
F**[iR A~Ul~K 05UUU25~
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The**stated disadv~nt.age to Narrow Gap Welding is tha*t proper fitup is more critical due to the smaller weld width.. This. problem is alleviated by using la~ers to assist in the fit up process~
Personn~l trainin~ and qualification, procedure ~~alification, and UT techniques were also discussed *. Additionally, a demonstration* of UT using test blocks was conducted.
Finally, radiographs from qual.ification welds were reviewed and discussed.
The licensee is in. the process of drafting a 50.59 analysis detailing the primary coolant system piping cuts and the Narrow Gap Welding process..This*.
analysis is scheduled to be tompleted June IS, 1990 and will be subsequ¢ntly*:
reviewed.
.i.-
.~
. Attachments:
Brian E. Holian,* Project Manager..
Proje~t ~irectorate JII-1 *
.oiviiion of.~eactor Projects - *111~.
IV, V and Special Projects Office of Nuclear Reactor Regtilati~n As stated
~..
~ '
'Cc w/attachnients*:
See next.page
.(... '*
Mr. Kenneth W. Berry
. Consumers Power Company cc:
M. I. Miller, Esquire Sidley & Austin
- *
- 54th Ffoor*
~--'-
On~ First Nation~l Plaza
_Chicago,"Illinois 60603 -
- Mr. Thomas A. McNish, Secretary Consumers Power Company 212 West Michigan Avenue Jac_kson, M1chi_9a.n 49201
'. Judd L. Bac9n, Esqu1 re Consumers. *Power _Company 212 West Michigan Aven.ue Jackson, Michi-gan 49201.
Reg1ona1 Admini~trator, Region.III
_ u*. S *.. Nuc 1 ear Regu 1 a tory Corrrnfss.fon 799.Roosevelt Road* -.
-.Glen E11yn,"*lllinois 60137* *
- 1:
Jerry Sarno Township Supervisor.
Cov_ert Township _*
36i97 M..:140 Highway'.. *
- Covert, Michigan** 49043
~
- . Off i.e.~ of the Governor.
Room 1 **-
C~pftol Building L~ns1~g, Mi~~lgan* 48913
_ Mr.* Gerald B.* Slade*
- Plant Genetal Manager
.F?al f sades-Plant 27780 Blue Star Memori~l
~Covert,_ M i~higa~ 49043 Hwy.
- Resident Inspector*..
. c/o U. s. Nuclear Regulatory Corrm1ss1on.
- Palisades Plant
- 27782 Blue Star Memorial Hwy.
Cov~rt, Michiga~ *49043 Palisades Plant Nuclear Facilities and
. Environmental Monitoring Sectton Office Division of Radiological Health
- P.O. Box 30035 Lansing, Michigan 48909
- (
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Name R.H *. Beck.
P.O. Flenner Richard Stump Jim Kuemin Jake Wechselberger Brian Holian Bob Pferson
- Keith Wichman Rob~rt A. Hermann.
Albert E. Curtis, III T
- C
- W i es n e~r Chris Hillrichs*
Mi chae*l H. Oa. l i chow Emard Brocknet Na.rr.P~. Gap::Welding CPCo/Bechtel/KWU/NRC Meeting UTL Laboratories Chattanooga, TN April 26, 1990
.Phone 301-253-4946 517-788-0324 616-399-3302
. 517-788-5867.
301-492-1334 301-492-1333 301-492-0797 301-492-0908 301-492-0911 615-499-0961
.. 415-768-3114 301-258-4184 615-499-0961.
615-499-0961 Affiliation Becht~l - Asst* Proj, Mgr..
Consumers Power Co.
Consumers Power Co...
- Consumers Power Co.
NRC NRC NRC NRC NRC UTL Bechtel-Welding Supervisor
--. Bechtel K~L! A 11 i a nee UTL Siemens/UTL
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- The stated disadvantage to Narrow Gap Welding is that proper fit up is more critical due to the smaller weld width. This problem is alleviated by using lasers to assist in the fit up process.
Personnel training and qualification, procedure qualification, and UT techniques were also discussed. Additionally, a demonstration of UT using test blocks was conducted.
Finally, radiographs from qualification welds were reviewed and discussed.
The licensee is in the process of drafting a 50.59 analysis detailing the primary coolant system piping cuts and the Narrow Gap Welding process. This analysis,:is scheduled to be completed June 15, 1990 and will be subsequently reviewed. provides a picture of a Narrow Gap Weld.
A package of proprietary handouts, providing additional details of the narrow gap process, is available upon request (x21333J.
Attachments:
As stated cc w/attachments:
See next page DISTRIBUTION.
-Ooc ket-f-i-1 e--':'>
NRC & local PDRs F.Miraglia-J. Partlow PD3-1 Reading D. Diianni B. Holian OGC E. Jordan NRC Participants ACRS(lO)
J. Clifford PM/PD31:DRSP BHolian ~
05/17/90
~e,~
(A)PD/PD31:DRSP DDiianni 05/f'l/90 Brian E. Holian, Project Manager Project Directorate 111-1 Division of Reactor Projects - III, IV, V and Special Projects Office of-Nuclear Reactor Regulation