Probability Table Monte Carlo Method Applied to CANDU-6 Cell Calculation in DRAGON

Abstract

We present recent progresses done regarding the development of a Monte Carlo module in the lattice code DRAGON. We propose using probability table cross sections in a Monte Carlo algorithm, as first introduced by D.E. Cullen at LLNL in the Monte Carlo transport code TART. In our case, the CALENDF formalism has been chosen for computing the probability tables, in addition with optimized energy meshes comprising only 295 or 361 groups. An evaluation of the coolant void reactivity (CVR) of a legacy CANDU-6 2D cell is discussed. Numerical results have been confronted to those of continuous-energy Monte Carlo and Collision Probability methods, establishing very good level of accuracy of the Probability Table Monte Carlo method.