Part 21 Report - 1996-071

ACCESSION #: 9512050143 Cooper Cameron Corporation Cooper-Bessemer Reciprocating Products Division 150 Lincoln Avenue Grove City, PA 16127-1898 412 458-8000 November 28, 1995 COOPER Cooper Energy Services Our Ref: QCG-10236 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dear Sir: In accordance with the requirements of the Nuclear Regulatory Commission Title 10, Chapter 1, Code of Federal Regulations, Part 21, Cooper- Bessemer Reciprocating Products Division, a division of Cooper Cameron Corporation, hereby notifies the Commission of a potential design defect of the KSV emergency diesel generator (EDG) system. On November 6, 1995, Braidwood Station reported that during maintenance activities excessive wear and rust was noted in the upper portion of the governor drive assembly (Assembly No. KSV-17-6). On November 7, 1995, Braidwood reported that the oil inlet hole in the top flange of the bearing retainer did not appear to extend through to the inside of the flange. The report indicated this was due to a sleeve repair of the bore blocking the oil hole. Lack of oil in this area could result in failure of this assembly resulting in EDG inoperability. Due to the potential of this defect and the ease of verification, it is recommended that all utilities verify an open oil passage in this assembly (see attachment). This assembly is installed on all Cooper-Bessemer KSV EDG's (except Zion and Cooper Nuclear Stations). Similar assemblies for these stations are KSV-17-1 (Zion and Cooper Nuclear), KSV-17-2 (Zion), and KSV-17-5 (Cooper Nuclear). It is also recommended that all utilities use the same procedures to verify the similar overspeed governor and drive assembly KSV-17-7. Cooper-Bessemer [Registered Trademark] o Enterprise [Trademark] o Penn [Trademark] o Ajax [Registered Trademark] o Superior [Registered Trademark] Page 2 November 22, 1995 QCG-10236 If you have questions concerning this report, please contact Andrew P. Steffan, Supervisor, Nuclear Support at 412-458-3455 or John M. Horne, Manager, Nuclear and Analytical Engineering at 412-458-3543. Sincerely, COOPER CAMERON CORPORATION J. D. Mowery Vice President and General Manager Attachment /kll cc: D. T. Blizzard - CES/GC J. M Horne - CES/GC A. D. Gillette - CES/GC M. A. Schleigh - CES/GC P. J. Shimek- CES/GC L. T. Stewart - CES/GC A. P. Steffan - CES/GC File: K5fa36 Page 3 November 22, 1995 QCG-10236 Copies to: Mr. Walter Haass Mr. Doug Mullen U.S. Nuclear Regulatory Commission Nebraska Public Power District One White Flint North Cooper Nuclear Station Washington, DC 20555 P. O. Box 98 Brownville, Nebraska 68321 Mr. Gary Hunt Houston Lighting and Power Mr. Terry O'Brien South Texas Project Commonwealth Edison Co. Wadsworth, TX 77483 1400 Opus Place Downers Grove, IL 60515 Mr. James Kenny Licensing Group Supervisor Mr. Lenny Schiavone Pennsylvania Power and Light Niagara Mohawk Power Corp. Two North Ninth Street Annex 2 301 Plainfield Road Allentown, PA 18101 North Syracuse, NY 13212 Mr. Matthew Heidorn Ms. Kathleen Russo Pennsylvania Power and Light Niagara Mohawk Power Corp. Susquehanna Steam Electric Station Nine Mile Road - Unit 2 P. O. Box 467 P. O. Box 63 Berwick, PA 18603 Lycoming, NY 13093 Mr. Terence Bannon Mr. Neil Thibodaux Nuclear Regulatory Affairs A2-4 Arizona Public Service Pennsylvania Power and Light Palo Verde Nuclear Generating Station 2 North Ninth Street P. O. Box 52034 Mail Station 7566 Allentown, PA 18101 Phoeniz, AZ 85072-2034 Mr. David Baran Mr. Thomas Bradish Commonwealth Edison Co. Manager, Nuclear Regulatory Affairs Byron Nuclear Power Station Arizona Public Service 4450 North German Church Rd. P. O. Box 52034 Mail Station 7636 Byron, IL 61010 Phoeniz, AZ 85072-2034 Mr. Michael Kneble Mr. Terry Vandevoort EnTergy Associates Commonwealth Edison Louisiana Power and Light Zion Generating Station Waterford 3 SES 101 Shiloh Blvd. Highway 18 Zion, IL 60099 Taft, LA 70006 Mr. Dave Gustafson Mr. Arthur G. Killinger Commonwealth Edison Co. MPR Associates, Inc. Braidwood Nuclear Power Station 320 King Street Tech Staff Electrical Group Alexandria, VA 22314-3238 Route 1, Box 84 Braceville, IL 60407 QCG-10236 Attachment 1 Figure omitted. Remove oil line and verify "through" hole using wire or similar object. *** END OF DOCUMENT ***

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