Experience with ANSI N14.30 for in-service inspections of semi-trailer used for spent fuel shipments Page: 1 of 14
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ORNL/CP-97108
EXPERIENCE WITH ANSI N14.30 FOR IN-SERVICE INSPECTIONS OF
SEMI-TRAILER USED FOR SPENT FUEL SHIPMENTS
Gregory J. Hirtz
Oak Ridge National Laboratory
Post Office Box 2008
Oak Ridge, TN 37831-6392
(423) 574 - 8536
(423) 574 - 9172 (fax) 0 1
hz3@orml.gov
ABSTRACT
On July 18, 1996, the Oak Ridge National Laboratory (ORNL) resumed shipping spent fuel in
interstate commerce after a 10-year suspension of this activity. This shipment was conducted
using a Nuclear Regulatory Commission-licensed spent fuel transport package purchased from
General Electric Company by ORNL for the purpose of moving High Flux Isotope Reactor spent
fuel to the Savannah River Site. The trailer, fabricated to the ANSI N14.30, "Semi-Trailers
Employed in the Highway Transport of Weight-Concentrated Radioactive Loads-Design,
Fabrication, and Maintenance," (ANSI, 1992) has recently undergone its first scheduled
in-service inspection. This paper presents the experience gained from interpretation and
application of the ANSI N14.30 standard focusing on the in-service inspection for the structure
of the trailer.
Initially, the term "weight-concentrated" is illustrated giving detail to the location and center of
gravity of the 33,500-pound shipping container and forces induced by the tie-down system.
Basic information about the design stresses and initial testing provided by the manufacturer are
used as a lead-in to the requirements of the standard. The task of examining the trailer structure
provided many lessons and required considerable effort. All of the support personnel were
provided by ORNL; the garage mechanics and the certified inspection engineers had never been
involved in applying ANSI N14.30. Other obstacles were the lack of existing inspection
procedures for this particular activity and the lack of a previous experience interpreting the
standard with regard to repair work. Some of these questions were resolved by clarification
received from the writers of the standard, and others were resolved by the teamwork between the
manufacturer and ORNL. This experience illustrated the importance of the trailer manufacturer
as a participant in the decisions made concerning in-service inspection and maintenance. Finally,
as a result of the effort required, there is also the question of economics related to the option of
maintaining or replacing the trailer. This paper presents these and other lessons learned during
the in-service inspection.
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Hirtz, Gregory J. Experience with ANSI N14.30 for in-service inspections of semi-trailer used for spent fuel shipments, article, May 1, 1998; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc711765/m1/1/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.