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|Title:||Numerical Simulation of Plastic Collapse of Copper-cast Iron Canister for Spent Nuclear Fuel|
|Authors:||MARTIN Oliver; NILSSON Karl-Fredrik; JAKSIC Nikola|
|Citation:||ENGINEERING FAILURE ANALYSIS vol. 16 p. 225-241|
|Publisher:||PERGAMON-ELSEVIER SCIENCE LTD|
|Type:||Articles in Journals|
|Abstract:||This paper describes a finite element simulation of a spent fuel canister for geological disposal loaded in iso-static pressure until plastic collapse. The canister consists of a copper overpack and a ductile cast iron insert with steel cassettes where the spent fuel is placed. The highly non-linear finite element analysis is based on the explicit formulation and includes large deformations, non-linear material behaviour and contact between the canister components. The analysis includes comparison between two- and three-dimensional models and assessment of the different geometrical features such as corner radius of the cassette, cassette offset, different bonding/debonding conditions between insert and steel cassette. The analysis shows that the bonding cassette/insert has a large impact on the collapse load. Two large-scale mock-ups test that had been performed earlier are also simulated by the developed finite element models. There is a very good agreement between measured and computed deformations vs. applied load and collapse load.|
|JRC Institute:||Institute for Energy and Transport|
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