Hypothetical Core Disruptive Analysis in Fast Reactors

Abstract

This paper describes briefly the physical model of a recently developed computer code ANEXDI which is a fast reactor accident analysis code and solves two phase nonequilibrium hydrodynamics equations in two diaensional Eulerian geometry. An application or this code in studying the Shock wave propagation in dusty gas has been discussed. The results so obtained compare well with other numerical solutions obtained with computer code SIMMER-II and an analytical formula for shock speed. The acceleration dependent drag forces have been found many times to stabilize the otherwise unstable numerical solutions. Numerical and analytical study of velocity equilibration between the lighter and heavier phases of the fluid is then presented. Thereafter, some two phase flow aspects of typical hypothetical oore disruptive accidents in fast reactors have been mentioned.