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Journal Articles Nuclear Engineering and Design Year : 2023

A viscoplastic approach to corium spreading during a severe nuclear accident

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Abstract

A viscoplastic model for lava is presented, and its use for corium spreading is argued with dimensionless numbers. It describes the tridimensional flow as non-Newtonian and non-isothermal. Using an adaptive finite element method based on C++ library Rheolef, simulations are ran and compared to the VEU7 corium spreading test. A sensitivity analysis on the viscoplastic parameters of corium that are not well-known is conducted. Tridimensional solution of the problem is computed from the bidimensional height-averaged solution.
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Dates and versions

hal-03893285 , version 1 (10-12-2022)

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Cite

Thomas Schiano, Barbara Bigot, Jean-François Haquet, Pierre Saramito, Claude Smutek. A viscoplastic approach to corium spreading during a severe nuclear accident. Nuclear Engineering and Design, 2023, 401, pp.112045. ⟨10.1016/j.nucengdes.2022.112045⟩. ⟨hal-03893285⟩
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