Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
ACCESSION #: 9807010116
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Coltec Industries Fairbanks Morse
Engine Division
701 White Avenue
Beloit, WI 53511-5492
www.fairbanksmorse.com
INTERIM LETTER 608/364-4411
Fax: 608/364-0382
SUPPLEMENT NO.: 97-002-04
To: Document Control Desk
U.S. Nuclear Regulatory Commission
Washington, DC. 20555
From: Coltec Industries - Fairbanks Morse Engine Division (FMED)
Date: 24 June 1998
Subject: Weldments on Opposed Piston and Coltec-Pie(stick Emergency
Stand-By Diesel Gen-Set Lube-Oil and Jacket Water Piping Systems
This is a supplement to the Interim Letter dated September 30, 1997, and
to previous supplements 97-00201, 97-002-02, and 97-002-003 dated
December 18, 1997, March 3, 1998, and April 29, 1998 respectively. It 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 97-002-03 previously stated that the initial conclusion is the
weld joints were of adequate strength for the application based on
tensile tests. In addition, Supplement 97-002-03 stated that the
metallurgical examination of the weld joints and review of the customer
contract requirements would be completed at the end of May 1998.
However, due to limited engineering resources, only the review of
customer contract requirements and metallurgical examination of the weld
joints have been completed at this time. The engineering analysis of the
metallurgical examination is in progress, and will be completed by August
14, 1998. At the completion of this item, the final notification will be
submitted.
The completed macro and microstructure examination included removing
three samples from each weld. Photomacrographs were taken to depict the
transverse view of the weld at each location. Photomicrographs were
taken to depict the absence of crack propagation at the weld root and to
exhibit general structure. The microstructure samples served to
determine the depth of weld penetration. The results of the examination
will be used by engineering for analysis. In addition, review of
customer contract requirements has been completed. All customer contract
requirements were satisfied. However, the requirements of the weld
procedures used by Coltec were not satisfied. Immediate action taken
included correcting any in process welds and briefing weld personnel on
proper weld joint design. Actions to preclude recurrence includes formal
training for all weld personnel on weld joint design, designation, and
interpretation, which is being tracked by Corrective Action Request 1750.
Previously submitted with Supplement 97-002-03 was a copy of Appendix E-1
describing the results of the tensile test. Appendix E-2 will contain
the results of the metallurgical examination and photographs of the weld
joints when completed. Appendix C exhibits photos of the sections of the
section of the piping as received. Appendix D exhibits photos of the
test section after completion of the burst testing. These three
appendices (C, D, and E-2) are not included in this supplement. They
will be included the final notification.
Sincerely,
James C. Golding
Senior Quality Assurance Engineer
Paul Danyluk
Vice President, Engineering
Cc: M. Armfield
T. Gill
B. Hall
A division of Coltec, Industries Inc
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