Current Results of BME NTI in the ECC-SMART Project: Different Analysis on the SCW-SMR

Abstract BME, as a consortium member, is participating in the ECC-SMART project, which has been awarded an EU/EURATOM/H2020 grant in 2020, and is researching the development of a supercritical water-cooled small modular reactor concept called SCW-SMR. This paper summarizes the research work carried out so far at BME within the framework of the project. Firstly, several international benchmarks were modelled by the APROS system code and the Ansys CFX CFD software package in order to demonstrate their applicability for the thermal hydraulics analysis of SCW. Later, a complete reactor vessel and a simplified primary circuit model were built with APROS, and a full-length fuel assembly model was developed in Ansys CFX. All the seven heat-up stages of the SCW-SMR pre-conceptual design were modelled and analyzed with these tools. The Serpent 2 Monte Carlo code and the in-house SPNDYN finite element code were used for reactor physics benchmarking, for various stand-alone reactor physics calculations and in loosely coupled (with APROS and Ansys CFX) and tightly coupled (with APROS) code systems in order to design and optimize the fuel and the reactor core of the SCW-SMR concept. Many successful calculation series (e.g. the so-called SCWR-FQT benchmark) have been performed with these codes and code systems.