Applications - Nuclear
Arup has pioneered the use of LS-DYNA for analysing nuclear material containers since the early 1980s.
The robust contact definitions and wide range of material models make LS-DYNA ideally suited to model these types of impact events.
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A wide range of impact events can be analysed;
- Size - from small shock absorber castings to a 92 tonne spent fuel flask
- Section - from impact of thin-gauge steel storage drums to thick-walled transport containers
- Targets - from idealized unyielding targets to a realistic desert soil target
- Deformations - from seal gap deformations on the order 0.1mm to gross solid metal flow deformations and buckling
- Materials - from steels to reinforced concrete to grouted wasteform with complex crush behaviour.
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Project Profile 1
Impact Analyses of Reusable Shielded Transport Container
Client: UK Nirex Ltd
The RSTC-285 is a reusable shielded transport container for ILW, made from steel with a nominal 285mm wall thickness.
Impact analyses were carried out to assess its performance in six different impact attitudes under conditions prescribed by the IAET
Transport Regulations. The 70,000-element model was validated against a series of one-third scale model drop tests before it was analysed
for the regulatory impacts. The results obtained from test and analyses agreed extremely well, for both global and local
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| 9m Lid-corner Attitude: body deformations |
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| Comparison of Lid Seal Membrane lug deformation between analysis and test |
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9m Side-Edge Attitude: body deformations
(contents not shown) |
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| Comparison of body acceleration between analysis and 9m lid-edge drop test |
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Project Profile 2
Impact Analysis of the New Modular Container
Client: Rolls-Royce
We have worked closely with Rolls Royce in their application for a competent authority license from the UK Department of Transport for
a fresh fuel container to IP-2 (fissile) standards. We made extensive computer analyses of the drop test event, and a small number of
confirmatory drop tests to provide confidence in the analysis results. This was the first time in the UK that computer impact analysis
was used as a major part of a licensing application.
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CAPTION HERE
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| Comparison of body acceleration between analysis and 9m lid-edge drop test |
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Project Profile 3
Evaluation of the Safety of Flasks Impacting Different Kinds of Targets
Client: European Commission DG XVII
This project was to investigate the true safety margin of flasks which had been designed according to the IAEA Transport Regulations,
when impacting real-life targets instead of the regulatory "unyielding" target. The second phase of this project has included
analysis of a TK-6 flask impacting a layered concrete target and a realistically-modeled desert soil target. The figure below shows an
impact crater in the soil target, sectioned along the plane of symmetry.
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