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Abstract
Brian Boer, Danny Lathouwers, Ming Ding, and Jan Leen Kloosterman,
Coupled neutronics/thermal hydraulics calculations for High Temperature Reactors with the DALTON-THERMIX code system,
International Conference on the Physics of Reactors, "Nuclear Power: a Sustainable Resource" (PHYSOR-2008), Interlaken, Switzerland (2008).
A code system for the simulation of steady state and transient behavior of High Temperature Pebble-bed type Reactors
was developed. To this end a new time-dependent (3D) diffusion code DALTON was coupled to an existing
thermal-hydraulics code THERMIX.
In order to validate the code system, simulations of the Pebble Bed Modular Reactor (PBMR) design and the
Arbetisgemeinschaft Versuchsreaktor (AVR) were performed for steady state and transient conditions. Special
attention has gone to the coupled calculation methodology for the various types of transients.
Both the PBMR simulations and a comparison of the calculation results with experimental data of the AVR were
satisfactory. The code system provides a key element in the development and optimization of (Very) High Temperature
Reactor designs in the framework of the RAPHAEL project.
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