Part 21 Report - 1996-510

ACCESSION #: 9609120078 Coltec Industries Fairbanks Morse Engine Division 701 White Avenue Beloit, WI 53511-5492 608/364-4411 FAX: 608/364-0382 File No. 96-002 3 September 1996 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Subject, OP 38TD8-1/8 Connecting Rod: part numbers 16600736, 16600737, 16701706, and 16701709. On 19 July 1996, Northeast Utilities, Millstone Nuclear Power Station notified Coltec Industries, Fairbanks Morse Engine Division that during installation of the B-EDG no. 4 lower connecting rod, it was determined that the serial numbers on the rod and its cap did not match, i.e. the rod and cap were not a matched set. A technical evaluation has determined the above as a substantial safety hazard. If the deviation had gone undetected, a bearing failure would have caused the engine to become inoperable due to possible misalignment of the bearing caused by an out-of-position condition with the crankshaft. Internal changes to affected manufacturing process are in-place to prevent recurrence of this situation. Coltec believes this situation is an isolated (unique) case and is unaware of any other similar occurrence, for either nuclear or non-nuclear application. However, utilities with the subject part numbers should, at the earliest practicable time, verify that the connecting rods installed in their Stand-by Emergency Diesel Engines possess matched sets of serial numbers on each rod and mated cap. In addition, each utility should check and verify any stock they may possess for the same condition. If there is any further need for clarification, please contact Fairbanks Morse Engine Division's Engineering or Quality Assurance Departments. Sincerely, Scott A. Fratianne Manager, Quality Assurance A division of Coltec Industries Inc *** END OF DOCUMENT ***

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