Internal cask content collisions during drop test of transport casks for radioactive materials

Quercetti, Thomas; Ballheimer, Viktor; Droste, Bernhard; Müller, Karsten

doi:10.1179/1746510913y.0000000032

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…The constant and homogenous acceleration field can often be the source of unrealistic results. On the other hand the dynamic effects like internal impacts (multiple-mass effect [7]) are not included directly and have to be considered by extra load factors or similar substitutes. The bounded nature of the load assumptions in the quasi-static analysis has always to be ensured.…”

Section: Load Assumptions and Analysis Methodsmentioning

confidence: 99%

“…It should be noted, that the dynamical effects and the way to their assessment presented here is only valid for the configurations with negligible multiple mass effects (without delayed content impact due to axial gap in the cask cavity). If such kind of impact interaction between cask lid and cask content is possible additional considerations are necessary [7].…”

Section: Lateral Drop Positionmentioning

confidence: 99%

See 1 more Smart Citation

Methodological Aspects for Numerical Analysis of Lid Systems for SNF and HLW Transport Packages

Linnemann

Ballheimer

Sterthaus

et al. 2014

Volume 3: Design and Analysis

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The regulatory compliance of the containment system is of essential importance for the design assessment of transport packages for radioactive materials. The requirements of the IAEA transport regulations SSR-6 for accident conditions implies high load on the containment system of Type B(U) packages. The integrity of the containment system has to be ensured under the mechanical and thermal tests. The containment system of German transport packages for spent nuclear fuel (SNF) and high level waste (HLW) usually includes bolted lids with metal gaskets. BAM Federal Institute for Materials Research and Testing as the German competent authority for the mechanical and thermal design assessment of approved transport packages has developed the guideline BAM-GGR 012 for the analysis of bolted lid and trunnion systems. According to this guideline the finite element (FE) method is recommended for the calculations. FE analyses provide more accurate and detailed information about loading and deformation of such kind of structures. The results allow the strength assessment of the lid and bolts as well as the evaluation of relative displacements between the lid and the cask body in the area of the gasket groove. This paper discusses aspects concerning FE simulation of lid systems for SNF and HLW transport packages. The work is based on the experiences of BAM within safety assessment procedures. The issues considered are the assessment methods used in the BAM-GGR 012 for bolted lid systems along with the nominal stress concept which is applied for bolts according to that guideline. Additionally, modeling strategies, analysis techniques and the interpretation of the results are illustrated by the example of a generalized bolted lid systems under selected accident conditions of transport.

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Section: Load Assumptions and Analysis Methodsmentioning

confidence: 99%

Section: Lateral Drop Positionmentioning

confidence: 99%