Bidirectional Conversion between CAD Model and TRIPOLI Model: An Extending Function of MCAM

TRIPOLI is a Monte Carlo (MC) particle transport code which can be applied to nuclear analysis of complex nuclear devices; however, modeling of a complex geometry for TRIPOLI computation is a time-consuming and error-prone task. MCAM (Monte Carlo automatic modeling system) is an interface code that can facilitate MC modeling by employing Computer Aided Design (CAD) technology. An extended function of MCAM was developed to implement the bidirectional conversion between CAD model and TRIPOLI model. Different geometry representations of CAD model and TRIPOLI model, as well as the process of bidirectional conversion between the two representations were introduced. ITER benchmark model, a complex fusion system, was converted into TRIPOLI model for validation, On the basis of the converted model, actual calculation of neutron flux on inboard blanket was performed, and the results were compared with that of MCNP calculation, which showed a good agreement. (authors)