Numerical interpretation of the MARA 10 test simulating a Hypothetical Core Disruptive Accident in a mock-up schematizing a reactor
Résumé
In case of a Hypothetical Core Disruptive Accident (HCDA) in a Liquid Metal Reactor, the interaction between fuel and liquid sodium creates a high pressure gas bubble in the core. The violent expansion of this bubble loads the vessel and the internal structures, whose deformation is important. The experimental test MARA10 simulates a HCDA in a mock-up schematizing simply the reactor block of a Fast Breeder Reactor. The test-facility is filled with water topped by an air blanket and the explosion is triggered by an explosive charge.
This paper presents a numerical simulation of the test with the CASTEM-PLEXUS code and an analysis of the computed results. In particular, we describe the evolution of the pressure, gas fraction, velocities in the fluid zone, as well as the displacements, stresses and strains of the internal and external structures.
Origine : Fichiers produits par l'(les) auteur(s)