Part 21 Report - 1997-783

ACCESSION #: 9803110201 Coltec Industries Fairbanks Morse Engine Division 701 White Avenue Beloit, WI 53511-5492 608/364-4411 FAX: 608/364-0382 INTERIM LETTER SUPPLEMENT NO.: 97-002-02 To: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC. 20555 From: Coltec Industries - Fairbanks Morse Engine Division (FMED) Date: 3 March 1998 Subject: Weldments on Opposed Piston and Coltec-Pielstick Emergency Stand-By Diesel Gen-Set Lube-Oil and Jacket Water Piping Systems This supplement to the Interim Letter dated 30 September 1997, and to supplement 97-002-01 dated 18 December 1997, is intended to inform the U.S. Nuclear Regulatory Commission, and the affected nuclear utilities on the progress of the root cause investigation, and corrective/preventative actions associated with the Coltec-FMED Part 21 File No. 97-002. Supplement 97-002-01 stated that "Results from the burst test should be available by the end of January 1998, at which time the review of customer contract requirements should also be complete. A final letter of notification should be available by the end of February 1998.". The burst testing portion of the investigation is complete. Twenty-two welded joints were individually pressurized between 2100 psig and 5000 psig, and then evaluated. A draft copy of the engineering report text is attached. The preliminary conclusion is that the welding of the joints is adequate for the service intended, and that no steps need to be taken to replace or rework piping runs in the field. Yet to be completed are the metallurgical portion of the investigation, and the review of customer contract requirements. These are scheduled to be completed by the end of April 1998, at which time a final notification should be available. The attached engineering report references appendices A through E. Appendix C exhibits photos of the sections of piping as received. Appendix D exhibits photos of the test sections after completion of the burst testing. Appendix E provides a summary of the detailed analysis of each of the tested joints, which includes metallurgical investigation results. These three appendices (C, D, and E) are not included in this supplement. They will be included in the final notification. Sincerely, Jeanne A. Conway Quality Assurance Engineer Paul Danyluk Vice President, Engineering Cc: M. Armfield T. Gill B. Hall A division of Coltec Industries Inc. *** END OF DOCUMENT ***

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