Implementing MCNP's 21st Century Geometry Capability: Requirements, Issues, and Problems

摘要

A new geometry capability has been implemented in MCNP [1] that permits the existence of an unstructured mesh with its legacy Constructive Solid Geometry (CSG) capability to form a hybrid geometry. This new feature enables the user to build complex 3-D models with Computer Aided Engineering (CAE) tools, such as Abaqus [2], and perform a neutronics analysis on the same geometry mesh that is used for thermo-mechanical analyses.rnThis paper will present an overview of the issues and problems encountered in implementing the requirements for the hybrid geometry capability in MCNP.