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)
Abstract:
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.
Keywords:
Large Scale Simulations in CS&E (earth, environment, finance, geoscience, engineering, ...)
