Conference presentation and video of: Lead Solidification and Re-Melting in a Pool: Experiment and CFD Modelling
Vincent Moreau,
Manuela Profir,
Tomas Melichar,
Narayanan Achuthan
Misc - 2022
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This paper describes and analyses a lead pool solidification re-melting experiment performed in the
SESAME-stand facility and its CFD modelling.
Lead-cooled Fast Reactors (LFRs) are promoted by the Generation IV International Forum (GIF) because
of molten lead ́s good thermo-physical properties, nuclear sustainability and safety. As lead melting point
is 327.5 °C , partial freezing can occur during specific operational regimes and impede the flow pattern.
In this case, the core decay heat removal might be limited and thus, the reactor safety can be affected.
To investigate this issue, in the SESAME H2020 project, the dedicated SESAME-stand experimental
facility with a vessel type geometry has been designed, built and operated at Research Centre Rez (CVR),
releasing a complete data base of its operation. In parallel, CFD models have been built, compared to the
data and progressively improved to a somewhat satisfactory level.
Some discrepancies still remain and some experimental results still need explanation. Improving
understanding of the data and trying to reduce the discrepancies is the starting point of this work. In
particular, the modelling was found extremely sensitive to physical parameters and constraints such as the
external thermal conditions as well as the vessel ́s surface emissivity.
Focusing on a solidification and re-melting transient, the data were analyzed and compared with a 90 o
sector CFD model of the pool. The 90 o restriction forbids to capture observed flow asymmetries. Thus, it
was proceeded with a full domain simulation and shown what additional features of the flow were
captured.
The video op the presentation is performed by Manuela Profir.
Images and movies
BibTex references
@Misc{MPMA22a,
author = {Moreau, V. and Profir, M. and Melichar, T. and Achuthan, N.},
title = {Conference presentation and video of: Lead Solidification and Re-Melting in a Pool: Experiment and CFD Modelling},
year = {2022},
type = {Presented at: The 19 th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19) Brussels, Belgium, March 6 - 11},
keywords = {CFD, HLM, LFR, pool thermal hydraulics, lead solidification},
url = {https://publications.crs4.it/pubdocs/2022/MPMA22a},
}
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