ML17318A688
| ML17318A688 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/17/1980 |
| From: | Wigginton D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17318A689 | List: |
| References | |
| NUDOCS 8004220012 | |
| Download: ML17318A688 (12) | |
Text
MARCH 1 'l 1980 Docket No.:
50-316 LICENSEE:
Indiana and Michigan Electric Company FACILITY:
Donald C.
Cook Nuclear Plant, Unit No.
2
SUBJECT:
Meeting Summary - Brown Boveri Turbine The licensee and representatives of Brown Boveri met with the staff on March 6, 1980 to discuss the design features of the D. C..Cook Unit 2 turbine.
An
, attendance list is attached.
The Brown Boveri (BB) turbine is unlike the shrunk fit shaft units produced by Westinghouse (W) and General Electric (GE), in that the BB unit rotor shaft is made of high-quality forged disks that are precision-machined and welded together in the outer diameter regions of the disks.
This produces a frequency-tuned assembly with welds in the 1'ower stressed regions.
The welding introduces relatively little initial stress as compared with the shrunk fit disk rotors by W and GE.
The BB turbine blades are loosely attached to the rotors using a "Christmas tree" method.
The D.
C.
Cook unit was partially assembled in Canada, and the last stage 52-inch blades were installed at the site.
The Cook unit is supported by single sets of bearings at each coupling to facilitate alignment.
The thrust bearing is at the high pressure s'tage and away from the generator so that thermal expansion in the third or last low pressure stage results in about 1 inch of expansion or elongation of the rotor shaft.
The bearings are three-stage cooled with air-oil, vacuum-oil, and hydrogen-oil as the cooling medium.
More details and specifics are contained in the five BB publications attached to the file copy of this meeting summary.
Original Signed Sy cc:
D. Eisenhut R. Tedesco W. Gammill A. Schwencer Y. Noonan E. Jordan (IE)
J. Collins (IE)
D. Wigginton, Project Manager Operating Reactors Branch ¹1 Attachments:
See next page
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Attachments:
1 - Meeting Attendance List 2 -
BB Publication No.
CH-T060030E - The 1160 MM Turbine for Donald C.
Cook Nuclear Plant of AEP 3 -
BB Publication No.
CH-T060072E - Melded Rotors for Steam Turbines 4 -
BB Publication No.
CH-T060053E - Rotors for Large Steam Turbines 5 -
BB Publication No.
CH-T060040 - Last Stage Blades of Large Steam Turbines 6 -
BB Publication No.
CH-T030043E -
Some Aspects of Mater Chemistry in Light Mater Reactor Power Stations
E Lk I ~
IL
Meeting Summary for Donald C.
Cook 1
and 2 March 17, 1980 Docket Files NRC PDR Local PDR QRhl Reading NR Reading H. Denton E.
Case D. Eisenhut R. Tedesco G. Zech B. Grimes M. Gammill L. Shao J. Miller R. Yollmer T. J. Carter A. Schwencer D. Ziemann P.
Check G. Lainas C. 'Crutchfield
- 8. Grimes T. Ippolito R. Reid Y. iloonan G. Knighton D. Brinkman Project Manager OELO OIaE (3)
C. Parrish/P.
Kreutzer ACRS (16) t&C Participants NSIC TERA Licensee Short Service List
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UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 NRCH g
7 ggg Docket No.:
50-316 LICENSEE:
Indiana and Michigan Electric Company FACILITY:
Donald C.
Cook Nuclear Plant, Unit No.
2 SUBJECT Meeting Summary - Brown Boveri Turbine The licensee and representatives of Brown Boveri met with the staff on March 6, 1980 to discuss the design features of the D.
C.
Cook Unit 2 turbine.
An attendance list is attached.
The Brown Boveri (BB) turbine is unlike the shrunk fit shaft units produced by Westinghouse (W) and General Electric (GE), in that the BB unit rotor shaft is made of high-quality forged disks that are precision-machined and welded together in the outer diameter regions of the disks.
This produces a frequency-tuned assembly with welds in the lower stressed regions.
The welding introduces relatively little initial stress as compared with the shrunk fit disk rotors by W and GE.
The BB turbine blades are loosely attached to the rotors using a "Christmas tree" method.
The D.
C.
Cook unit was partially assembled in Canada, and the last stage 52-inch blades were installed at the site.
The Cook unit is supported by single sets of bearings at each coupling to facilitate alignment.
The thrust bearing is at the high pressure stage and away from the generator so that thermal expansion in the third or last low pressure stage results in about 1 inch of expansion or elongation of the rotor shaft.
The bearings are three-stage cooled with air oil, vacuum-oil, and hydrogen-oil as the cooling medium.
More details and specifics are contained in the five BB publications attached to the file copy of this meeting summary.
cc:
D. Eisenhut R. Tedesco W. Gammill A. Schwencer V. Noonan E. Jordan (IE)
J. Collins (IE)
D. Wigginton, Project Manager Operating Reactors Branch 01 Attachments:
See next page 5004gsoQ Ig
e
MARCH 1 V 1980 Attachments:
1 - Meeting Attendance List 2 -
BB Publication No.
CH-T060030E - The 1160 NM Turbine for Donald C.
Cook Nuclear Plant of AEP 3 -
BB Publication No.
CH-T060072E - Melded Rotors for Steam Turbines 4 -
BB Publication No.
CH-T060053E - Rotors for Large Steam Turbines 5 - BB Publication No.
CH-T060040 - Las't Stage Blades of Large Steam Turbines 6 -
BB Publication No.
CH-T030043E - Some Aspects of Mater Chemistry in Light Mater Reactor Power Stations
11
LIST OF ATTENDEES D.
C.
COOK MEETING MARCH 6 1980 American Electric Power Richard G. Kriftner T. J.
Seery Brown Boveri Kurt W. Brandstatter (Large Turbine Section)
Paul Hughes (Assistant Vice President, Mech. Division)
Georg Naumann (Manager, Service and Engineering)
Nuclear Re ulator Commission R.
W. Klecker C.
D. Sellers W.
S. Hazelton C.
M. Kleffer H. Walker D.
L. Wigginton W. J.
Ross W. J. Collins Attachment 1
D