In the context of GEN-IV Heavy Liquid Metal safety studies, the flow blockage in a Fuel sub-assembly is considered one of the main issues to be addressed and the most important and realistic accident for LFR Fuel Assembly. The present document is a first step towards a detailed analysis of such phenomena, and a CFD model and approach is presented to have a detailed thermo-fluid dynamic picture in the case of blockage. In particular, a careful comparison is presented between open square-lattice grid-spaced elements (without wrap) and triangular lattice, hexagonal wrapped, grid-spaced fuel assembly. At this stage, the details of the spacer grids have not been considered, but a conservative analysis has been carried out basing on the main geometrical and physical features. Reactivity feedback, as well as axial power profile, has not been considered here.

Fuel Assembly Flow Blockage in a LFR Reactor Core: CFD Modelling and Preliminary Numerical Analysis

Di Piazza, Ivan
2012

Abstract

In the context of GEN-IV Heavy Liquid Metal safety studies, the flow blockage in a Fuel sub-assembly is considered one of the main issues to be addressed and the most important and realistic accident for LFR Fuel Assembly. The present document is a first step towards a detailed analysis of such phenomena, and a CFD model and approach is presented to have a detailed thermo-fluid dynamic picture in the case of blockage. In particular, a careful comparison is presented between open square-lattice grid-spaced elements (without wrap) and triangular lattice, hexagonal wrapped, grid-spaced fuel assembly. At this stage, the details of the spacer grids have not been considered, but a conservative analysis has been carried out basing on the main geometrical and physical features. Reactivity feedback, as well as axial power profile, has not been considered here.
Tecnologia del piombo;Generation IV reactors;Rapporto tecnico;Termoidraulica del nocciolo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/7184
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