Digital Twin-Driven Development of Online Monitoring and Data Management Systems in TMSR-SF0

With the development of a new generation of information technology, the monitoring systems in the nuclear power field are also facing the technological revolution of digital reform. Based on the example of Thorium Molten Salt Reactor-Solid Fuel (TMSR-SF0), this paper introduces the overall structure, modeling and mapping, and digital visualization expression means, then a complete development scheme of the real-time online 3D monitoring system is proposed. Firstly, the digital mapping model of the molten salt reactor was established, and the model docking and virtual scene rendering were completed in the Unity engine. Secondly, the back-end server using Experimental Physical and Industrial Control System (EPICS) and a proxy server using Node.js are established, and spatio-temporal data association is realized through Node-EPICS event driver and Socket.io. Finally, the MySql database interface and xCharts visualization framework are introduced to complete data storage and expression. Verified by practice, The 3D monitoring system is feasible in design and operation. Compared with the previous monitoring system, the data update period is increased to 20ms, and it has the whole process of data collection, network communication, graph element dynamic display, and other functions, which can promote the operation management and monitoring of nuclear power plants, and provide a reference for the digital transformation of monitoring technology in the nuclear power field.