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Proceedings Paper

TRIO-EF: a general thermal hydraulics computer code applied to the AVLIS process
Author(s): Jean Paul Magnaud; Michel Claveau; Nadia Coulon; Philippe Yala; Daniel Guilbaud; Albert Mejane
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Paper Abstract

TRIO-EF is a general purpose Fluid Mechanics 3D Finite Element Code. The system capabilities cover areas such as steady state or transient, laminar or turbulent, isothermal or temperature dependent fluid flows; it is applicable to the study of coupled thermo-fluid problems involving heat conduction and possibly radiative heat transfer. TRIO-EF is developed by the Heat Transfer and Structural Mechanics Department of the French Atomic Energy Commission CEA/DMT. It is widely used for applications in reactor design, safety analysis and final nuclear waster disposal. More recently, it has been used to study the thermal behavior of the AVLIS process separation module. In this process, a linear electron beam impinges the free surface of a uranium ingot, generating a two dimensional curtain emission of vapor. The metal is contained in a water-cooled crucible. The energy transferred to the metal causes its partial melting, forming a pool where strong convective motion increases heat transfer towards the crucible. In the upper part of the Separation Module, the internal structures are devoted to two main functions: vapor containment and reflux, irradiation and physical separation. They are subjected to very high temperature levels and heat transfer occurs mainly by radiation. Moreover, special attention has to be paid to electron backscattering. These two major points have been simulated numerically with TRIO-EF and in this paper, we present and comment the results of such a computation, for each of them. After a brief overview of the computer code, two examples of the TRIO-EF capabilities are given: a crucible thermal hydraulics model, and a thermal analysis of the internal structures.

Paper Details

Date Published: 28 May 1993
PDF: 15 pages
Proc. SPIE 1859, Laser Isotope Separation, (28 May 1993); doi: 10.1117/12.145496
Show Author Affiliations
Jean Paul Magnaud, Commissariat a l'Energie Atomique (France)
Michel Claveau, Commissariat a l'Energie Atomique (France)
Nadia Coulon, Commissariat a l'Energie Atomique (France)
Philippe Yala, Commissariat a l'Energie Atomique (France)
Daniel Guilbaud, Commissariat a l'Energie Atomique (France)
Albert Mejane, Commissariat a l'Energie Atomique (France)

Published in SPIE Proceedings Vol. 1859:
Laser Isotope Separation
Jeffrey A. Paisner, Editor(s)

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