Uncertainties in seismic design of free-standing HDSFS Racks

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Title: Uncertainties in seismic design of free-standing HDSFS Racks
Authors: Gonzalez Merino, Alberto
Costas de la Peña, Luis
González, Arturo
Permanent link: http://hdl.handle.net/10197/7810
Date: 30-Jul-2016
Abstract: High Density Spent Fuel Storage (HDSFS) racks are structures designed to hold nuclear spent fuel assemblies removed from the nuclear power reactor after having been irradiated. They are used in the first step of the waste management process, during the wet storage. The underwater seismic response of HDSFS racks is a troubling safety issue. Since they are 12 m submerged free standing multi-body structures loaded with radioactive fuel, their design remains as complex as crucial [1] [2]. The design deals with a Fluid-Structure Interaction (FSI) problem, a transient dynamic response and a very highly nonlinear behaviour. Several cost-effective industrial approaches have been used in these calculations to date, but some dispersion of results still exists. Therefore, the regulatory authorities are requiring an evaluation of the uncertainties in the methodology. Equipos Nucleares, S.A. (ENSA) is a worldwide expert in racks design and construction [3] and has recently launched a research project to improve the understanding of the phenomena. The latter is funded by the European Comision1 and aimed to identify, evaluate and reduce the uncertainties involved in the calculations. In this paper, the state of the art and the current sources of uncertainty are discussed.
Funding Details: European Commission Horizon 2020
Type of material: Conference Publication
Keywords: Racks;Free-standing;FEM;Dynamic analysis;Nonlinear;Fluid-structure interaction;Hydrodynamic mass
Language: en
Status of Item: Peer reviewed
Conference Details: 9th International Youth Nuclear Congress (IYNC 2016), Hangzhou, China, 24-30 July 2016
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection
TRUSS-ITN Research Collection

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