The Loss Of Vacuum Accident is one of the hazardous events that may occur in nuclear fusion power plants which work with the magnetic confinement technology. During these accidents, the intake of air may re-suspend toxic, explosive and radioactive dust, involving a hazardous release in the external environment. Several studies have been conducted in scaled facilities, in order to investigate and understand how the phenomenon works. In the previous studies, the authors replicated these events in several different conditions by means of the scaled facility called “STARDUST-Upgrade”, providing a good description of the phenomenon. A Computational Fluid Dynamic (CFD) code able to replicate these events has been developed and validated. Once a scaled experiment is realized, a specific analysis must be performed to understand if the phenomenon can be scaled and in what conditions. A result obtained in STARDUST-Upgrade, that is much different in terms of size and shape from a real TOKAMAK, must be modified by an adequate scaling law. The aim of this work is to analyse how to deduce a scaling law (for large scale flow) by a theoretical analysis based on the Buckingham π theorem. The authors will present also the experimental analysis provided to validate some features of this model. The conclusion of the work will be the use of the scaling law to obtain technical information (pressurisation time) about a LOVA inside an ITER-like reactor and further fusion power plants.

Rossi, R., Ciparisse, J., Gaudio, P., Malizia, A. (2019). A scaling law of pressurisation time in the case of Loss Of Vacuum Accidents (LOVAs): Theoretical and experimental analysis. FUSION ENGINEERING AND DESIGN, 143, 16-23 [10.1016/j.fusengdes.2019.03.112].

A scaling law of pressurisation time in the case of Loss Of Vacuum Accidents (LOVAs): Theoretical and experimental analysis

Riccardo Rossi
Investigation
;
Pasqualino Gaudio
Funding Acquisition
;
Andrea Malizia
Supervision
2019

Abstract

The Loss Of Vacuum Accident is one of the hazardous events that may occur in nuclear fusion power plants which work with the magnetic confinement technology. During these accidents, the intake of air may re-suspend toxic, explosive and radioactive dust, involving a hazardous release in the external environment. Several studies have been conducted in scaled facilities, in order to investigate and understand how the phenomenon works. In the previous studies, the authors replicated these events in several different conditions by means of the scaled facility called “STARDUST-Upgrade”, providing a good description of the phenomenon. A Computational Fluid Dynamic (CFD) code able to replicate these events has been developed and validated. Once a scaled experiment is realized, a specific analysis must be performed to understand if the phenomenon can be scaled and in what conditions. A result obtained in STARDUST-Upgrade, that is much different in terms of size and shape from a real TOKAMAK, must be modified by an adequate scaling law. The aim of this work is to analyse how to deduce a scaling law (for large scale flow) by a theoretical analysis based on the Buckingham π theorem. The authors will present also the experimental analysis provided to validate some features of this model. The conclusion of the work will be the use of the scaling law to obtain technical information (pressurisation time) about a LOVA inside an ITER-like reactor and further fusion power plants.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - Fisica Sperimentale
Settore ING-IND/18 - Fisica dei Reattori Nucleari
English
Con Impact Factor ISI
Rossi, R., Ciparisse, J., Gaudio, P., Malizia, A. (2019). A scaling law of pressurisation time in the case of Loss Of Vacuum Accidents (LOVAs): Theoretical and experimental analysis. FUSION ENGINEERING AND DESIGN, 143, 16-23 [10.1016/j.fusengdes.2019.03.112].
Rossi, R; Ciparisse, J; Gaudio, P; Malizia, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/211571
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