Recently, INEST？Team has successfully completed the integrated simulation of nuclear accident simulation for China Lead-based Research Reactor (CLEAR-I). The aim of the integrated simulation is to help researchers better understand reactor behaviors under accident conditions with much higher reliability than previously available methods. The flow and temperature change in the coolant area can be displayed inside and outside of reactor through the simulation. Simulation results show that CLEAR can be safe and efficient for residual heat removal under typical accident conditions.

The research is supported by virtual nuclear power plant Virtual4DS in digital social environment. It is based on super computer and advanced simulation software used in nuclear energy which is self-developed by INEST？ Team. The research is focused on integrated simulation for CLEAR-I under typical accident conditions. It is intended to help researchers better understand and analysis the security features, optimize the design and improve the security. Focused on how to simulate reactor behaviors in high-fidelity under nuclear accident conditions, INEST？ Team has developed multi-scale coupling method of one-dimensional and three-dimensional transient analysis code, real-time visualization method of multi-dimensional, multivariable and large-scale nuclear simulation data.

Virtual nuclear power plant Virtual4DS in digital social environment was initiated by INEST· Team and it is a prospective study project which can realize a full-range and full-cycle of the reactor behaviors and properties of high-fidelity multi-physics integrated simulation. It is based on the deep integration of advanced information technologies such as cloud platform, high-performance computing, virtual reality, visualization, big data, collaboration technology and internet of Things. Virtual4DS is considering radiation, neutronics transportation, burn-up, thermal-hydraulic, structural stress, material behavior, fuel properties, probabilistic safety, accident safety, environmental impaction and many other aspects of the integrated simulation. The seamless integration of different physical process data, high sense of reality and immersive experience, virtual assembly and design verification, maintenance plan and virtual training, occupational exposure dose assessment and optimization can also be released by this platform. Virtual4DS has been preliminarily applied to the design and anlaysis of ADS reactor system supported by “Strategic Priority Research Program” of Chinese Academy of Sciences and International Thermonuclear Experimental Reactor (ITER), which will lead an intelligent digital society by deeply integrating with other digital simulation system, including digital city, digital meteorology, digital earthquake, etc .