<p>Nuclear energy is gaining attention as a clean and efficient source of energy. High Temperature Gas-cooled Reactor (HTGR)&nbsp;has become the focus of research in various fields of nuclear engineering around the world for their high economic efficiency and good intrinsic safety. However, HTGR has not been built on a large scale, lacking sufficient experience in nuclear power plant operation, therefore, an accident simulation system with high precision and&nbsp;validated mathematical modelis necessary for future accident analysis and personnel training of nuclear power plant. The Department of Engineering Physics of Tsinghua University and Neoswise Science &amp; Technology Co. Ltd jointly developed a HTGR accident simulation system based on the VPOWER platform. VPOWER is a new fully integrated simulation support system. It includes a series of advanced functions such as graphical configuration modeling, database management, distributed computing, etc. It also provides verified mathematical models for thermal, electrical, and control simulation of various unit simulations. Based on Tsinghua University's research in HTGR, the simulation system can provide users with a perfect and reliable HTGR control system model which supports the functions of accident insertion, accident evolution, and accident analysis for various types of nuclear power plants. At the same time, a friendly logical configuration interface is also provided. The simulation system described in this paper has a broad application prospect to help users simulate accidents in HTGR power plants, study the accident process, and conduct reactor safety analysis. In the field of nuclear engineering education, the system can also help students deepen their understanding of the operation of advanced reactor equipment, which will help them enter the nuclear power industry in the future. This paper will focus on the failure accident of control rod and safety rod in HTGR. The simulation system is applied to study the core power, pressure, flow rate, temperature change of the main loop. Then the inherent safety of HTGR is further analyzed. The simulation results show that the HTGR can realize emergency shutdown after the accident, and its main equipment parameters can quickly fall below the safety threshold. This is in line with the HTGR design expectation, which indicates that the simulation system is reasonable and reliable.</p>

A High-Temperature Gas-Cooled Reactor (Htgr) Simulation System and Its Application Based on Vpower Platform

Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE28/volume/85246

2021 28th International Conference on Nuclear Engineering (ICONE28)

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