Prof. dr. Iztok Tiselj, the first Slovenian nuclear expert to hold a lecture at the American Nuclear Society

American Nuclear Society Winter Meeting 2018 lasted from 11th to 15^th of November 2018. Three special conferences were held at the General Conference: "Embedded Topical Meeting: Advances in Thermal Hydraulics", "Advances in Nuclear Nonproliferation Technology and Policy Conference" and "Technology of Fusion Energy".

The general part of the conference was marked by the efforts to revive US nuclear energy, where most of the speakers, as the best opportunity, see small modular reactors. In the field of nuclear thermal hydraulics most of the presentations was about computationally complex three-dimensional simulations of single phase and two-phase flows occurring in nuclear reactors.

Prof. dr. Iztok Tiselj from the Jožef Stefan Reactor Engineering Division and Head of the Department of Nuclear Engineering at the Faculty of Mathematics and Physics at the University of Ljubljana held on November 15th, a one-hour lecture within the "Advances in Thermal Hydraulics" meeting. The lecture entitled "Direct Numerical Simulation and Wall-Resolved Large Eddy Simulation in Nuclear Thermal Hydraulics" was co-authored by dr. Cedric Flageul, associate of the research division of the French energy giant EDF (“Electricite de France”) who was post-doc in the Reactor Engineering Division and the doctoral student Jure Oder. The topic of the lecture were the most detailed physical models and the most accurate numerical methods that we use today for turbulent flow simulations, namely the use of direct numerical simulation (DNS) and large eddy simulation (LES) in the field of nuclear engineering. The extraordinary accuracy of these models/methods also requires a lot of computational power, and therefore their use in industry is today still very rare. This two methods are besides experiments today a key method for researching the basic mechanisms of turbulent heat and mass transfer.

 The mentioned research is a part of the research project started this year at the of Reactor Engineering DIvision, where we will accurately predict the transfer of heat in annular geometry with these calculation methods and experiments. Three-quarters of the funds for the project are contributed by the ARRS, and a quarter by the Krško Nuclear Power Plant. We thank everyone for the support. Prof. Tiselj is the first Slovenian nuclear expert to hold a lecture at the American Nuclear Society.