Study On Key Technologies Of Integrated Neutronics Simulation Cloud Platform For Advanced Nuclear Systems

The integrated neutronics simulation can solve the problems of complex neutron energy spectrum structure,complex material nuclide composition and complex spatial geometry of advanced nuclear systems through coupling simulation of neutrons and related multiple physical effects.Cloud computing technology has the advantages of multi-user collaboration,large-scale computing,and easy sharing.Base on the combination of the integrated neutronics simulation and cloud computing technology,the integrated neutronics simulation cloud platform can effectively solve the problems of the requirments of massive calculation resources and multi-professional software integration simulation environment,and improve the efficiency of nuclear design and safety analysis of advanced nuclear systems.The main research contents and innovations in this paper are as follows:(1)Designed the architecture of an integrated neutronics simulation cloud platform.The architecture put the model and application in the cloud,realizes centralized cloud online modeling and visualization of results through real-time backhaul of remote desktop based on video streaming,and realizes high-performance neutronics calculation.At the same time,the security design of cloud platform is enhanced in the aspects of data storage,data transfer and application.The architecture can realize the cloud based-integrated neutronics simulation,which improves the convenience and efficiency of nuclear design and safety analysis.(2)Developed a multi-index scheduling algorithm based on the calculation of radiaition transport computing performance.The algorithm combines the predictable characteristics of Monte Carlo radiaition transport simulation time,and establishes comprehensive evaluation indicators from the aspects of job priority,queuing time,required resources,running time and resource satisfaction,and coupled differential evolution algorithm for weight optimization.According to different application scenarios,the appropriate index weights are optimized,and the backfill algorithm is coupled to improve the resource utilization.Compared with the typical scheduling algorithm,the algorithm effectively optimizes the core performance indicators such as total running time and average weighted turnover.The algorithm takes into account fairness and resource utilization,can dynamically adjust the index weights to meet resource scheduling requirements in different situations.Combined with the above architecture and scheduling algorithm,based on SuperMC we developed a prototype system of neutron integrated simulation cloud platform.Through the IAEA-BN600,BEAVRS,IAEA-ACB,ITER-T426 and other international benchmark examples,the multi-user and multi-operation cloud design mode of the cloud platform was systematically tested to verify the effectiveness and practicability.The cloud platform can be applied to the integrated neutronics simulation of advanced nuclear systems,which plays an important role in improving the efficiency and convenience of nuclear design and safety analysis.