This paper presents a finite-element technique to simulate the structural responses and to evaluate the cumulative damage of a radioactive material packaging requiring bolt closure-tightening torque and subjected to the scenarios of the Hypothetical Accident Conditions (HAC) defined in the Code of Federal Regulations Title 10 part 71 (10CFR71). Existing finite-element methods for modeling closure stresses from bolt pre-load are not readily adaptable to dynamic analyses. The HAC events are required to occur sequentially per 10CFR71 and thus the evaluation of the cumulative damage is desirable. Generally, each HAC event is analyzed separately and the cumulative damage is partially addressed by superposition. This results in relying on additional physical testing to comply with 10CFR71 requirements for assessment of cumulative damage. The proposed technique utilizes the combination of kinematic constraints, rigid-body motions and structural deformations to overcome some of the difficulties encountered in modeling the effect of cumulative damage. This methodology provides improved numerical solutions in compliance with the 10CFR71 requirements for sequential HAC tests. Analyses were performed for the Bulk Tritium Shipping Package (BTSP) designed by Savannah River National Laboratory to demonstrate the applications of the technique. The methodology proposed simulates the closure bolt torque preload followed by the sequential HAC events, the 30-foot drop and the 30-foot dynamic crush. The analytical results will be compared to the package test data.
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ASME 2007 Pressure Vessels and Piping Conference
July 22–26, 2007
San Antonio, Texas, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4285-1
PROCEEDINGS PAPER
Dynamic Analysis of the Bulk Tritium Shipping Package Subjected to Closure Torques and Sequential Impacts
Tsu-Te Wu,
Tsu-Te Wu
Savannah River National Laboratory, Aiken, SC
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Paul S. Blanton,
Paul S. Blanton
Savannah River National Laboratory, Aiken, SC
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Kurt R. Eberl
Kurt R. Eberl
Savannah River National Laboratory, Alken, SC
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Tsu-Te Wu
Savannah River National Laboratory, Aiken, SC
Paul S. Blanton
Savannah River National Laboratory, Aiken, SC
Kurt R. Eberl
Savannah River National Laboratory, Alken, SC
Paper No:
PVP2007-26294, pp. 477-484; 8 pages
Published Online:
August 20, 2009
Citation
Wu, T, Blanton, PS, & Eberl, KR. "Dynamic Analysis of the Bulk Tritium Shipping Package Subjected to Closure Torques and Sequential Impacts." Proceedings of the ASME 2007 Pressure Vessels and Piping Conference. Volume 7: Operations, Applications and Components. San Antonio, Texas, USA. July 22–26, 2007. pp. 477-484. ASME. https://doi.org/10.1115/PVP2007-26294
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