Large-Scale Two-Phase Flow Simulations in Fuel Bundles of Advanced Light Water Reactors
Kazuyuki Takase (Japan Atomic Energy Agency)
Hiroyuki Yoshida (Japan Atomic Energy Agency)
Takeharu Misawa (Japan Atomic Energy Agency)
In order to predict the water-vapor two-phase flow dynamics in a fuel assembly of an advanced light-water reactor, a large-scale parallel computing of boiling two-phase flow was carried out. Conventional analysis methods such as subchannel codes and system analysis codes need composition equations based on the experimental data. In a case that there are no experimental data regarding the thermal-hydraulics in the tight-lattice core, therefore, it is difficult to obtain high prediction accuracy on the thermal design of the advanced light-water reactor core. Then, a mechanistic two-phase flow simulation method was proposed and also two simulation codes were developed. One is the TPFIT code based on the interface–tracking method and the other one is ACE-3D based on the two-fluid model. So both codes are fully parallelized, high performance computing is enable each other. This paper describes the boiling two-phase flow simulation results with TPFIT and ACE-3D. From the present results, the high prospect was acquired on the possibility of establishment of a new thermal design method for the advanced light-water reactor cores by the large-scale simulation only.
Large Scale Simulations in CS&E (earth, environment, finance, geoscience, engineering, ...)
Toulouse | France | 2008 | June | 24  25  26  27