ML17187A684
| ML17187A684 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 12/17/1996 |
| From: | Stang J NRC (Affiliation Not Assigned) |
| To: | Johnson I COMMONWEALTH EDISON CO. |
| References | |
| TAC-M96902, NUDOCS 9612180346 | |
| Download: ML17187A684 (3) | |
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Ms. Irene Johnson, Acting Manager Nuclear Regulatory Services Commonwealth Edison Company Executive Towers West III 1400 Opus Place, Suite 500 Downers Grove, IL 60515
~ *.7 December 17,'<199~
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SUBJECT:
REQUEST FOR ADDITIONAL INFO~MATION (TAC~N0;.M96~02):
Dear Ms. Johnson:
In let~ers dated September 16, 1996, and Sept~mber ~O, 1996,
- Co~monwealth*Edison*Cqmpany,informed the.~~C staff that cracks wer~ found in:
-the Dresden, Unit.3, : Reactor Water Cleanup ( RWCU)
- system non-re.generative heat
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exchangeP inlet nozzle and the method by which the. c.raeks would -be r~paired*.-.
The staff.curre~tly.:has th.is matter under r'evi ew and has determined the need*.
- for additional *;:nformation:
PH~as.e pr:ovide a response; to the enclosed Req~est for Additional. Information. (RAI) ~ithi.n 30 days.'after *receipt of this letter.
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- . For any qu.e.st fons conce.rni ng* this issue*? pleas~
at (301) 415~1345.
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- .Sincerely,*
... }. *-**
Docket* No.. 50-249*
DISTRIBUTION*:
Docket Fi l_e POI 11-2. r /f EAdensam J.. Stang ACRS,.T2E26 C. Moore DOCUMENT NAME:
G:\\DR96902.LTR "C" *= Copy without enclosures "E" = Copy with enclosures "N" = No copy OFFICE PM:PDIII-2 D:PDIII-2 NAME JSTANG:avl RCAPRA
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I. Johnson Conunonwealth Edison Company cc:
Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Site Vice President Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois. 60450-9765 Station Manager Dresden Nuclear Power Station 6500 North Dresden Road Morris, Illinois 60450-9765 U.S. Nuclear Regulatory Commission Resident Inspectors Office Dresden Station 6500 North Dresden Road Morris, Illinois 60450-9766 Regional Administtator U.S. NRC, Region III 801 Warrenville Road Lisle, Illinois 60532-4351 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois. 62704 Chairman Grundy County Board Administration Building 1320 Union Street Harri~, Illinois 60450 Document Control Desk-Licensing Conunonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove, Illinois 60515 Dresden Nuclear Power Station Unit Nos. 2 and 3
REQUEST FOR ADDITIONAL INFORMATION CONCERNING THE REACTOR WATER CLEANUP SYSTEM HEAT EXCHANGER REPAIR COMMONWEALTH EDISON COMPANY
- DRESDEN NUCLEAR POWER STATION, UNIT 3 DOCKET NO. 50-249 I.
Provide a description of the flaw, including the size, location and a sketch of the exact location of the flaw.
- 2.
Provide the as-measured weld overlay dimensions.
- 3.
Provide the as-measured Ferrite content of the weld overlay including the numb~r of measurements taken, data of each measurement and the location of each measurement.
- 4.
How many layers were applied in the weld overlay?
- 5.
Was the pipe filled with water during the overlay fabrication?
- 6.
Provide a description of how the through-wall.crack was sealed prior to the fabrication of the weld overlay.
- 7.
Identify the welding process and the material used in the weld overlay.
- 8.
Provide the results of the liquid penetrant test ~nd the ferrite measurements performed on the first layer of the overlay.
- 9.
Provide the shrinkage measurement data resulting from the application of the weld overlay.
- 10.
Identify any deviations from the code case for the weld overlay repair in the design and fabrication of the subject weld overlay applied at Dresden, Unit 3.
ENCLOSURE