Recent results of three-dimensional CFD simulations of coolant mixing in VVER-440/213 reactor pressure vessel
18th Symposium of AER on VVER Reactor Physics and Reactor Safety (2008, Eger, Hungary)
CFD, Hydraulic calculations
Abstract
The Budapest University of Technology and Economics, Institute of Nuclear Techniques (BUTE INT) has been working since 2001 on the three-dimensional CFD model of the reactor pressure vessel of the VVER-440 type reactor. During this time period ? due to the development of the available computational capacity ? a very complex and detailed model of the RPV has been developed.
The aim of the construction of the new model is to describe further internal structures of the RPV (e.g. correct modeling of brake tubes, or internals in the upper mixing chamber) and to perform an extensive sensitivity analysis on the different modeling and calculation parameters (e.g. porous region models vs. detailed modeling, or n different turbulence models).