基于EPICS架构的熔盐堆实时建模与仿真平台开发及验证

Development and validation of real-time modeling and simulation platform for molten salt reactor based on EPICS framework

核电仿真技术被广泛地应用于反应堆设计、安全分析、独立安全评价、事故缓解措施、控制与保护系统设计与优化、先进主控室设计验证、操作员培训等方面的研究,有效地提高了核电厂的安全性和经济性。为满足液态燃料熔盐堆实时建模与仿真需求,基于实验物理与工业控制系统(Experimental Physics and Industrial Control System,EPICS)的开源、开放式架构,集成了具备实时动态交互功能的液态燃料熔盐堆系统分析程序RELAP5-TMSR和图形化人机交互界面模块,扩展了可视化控制与保护系统模块,开发了适用于液态燃料熔盐堆的开放式实时建模与仿真平台ThorTypography。以熔盐实验堆(Molten Salt Reactor Experiment,MSRE)的启泵、停泵、自然循环和反应性引入实验作为基准题,对ThorTypography平台开展了正确性验证和实时性测试。验证和测试结果表明:ThorTypography实时建模与仿真平台的计算结果和RELAP5-TMSR独立计算结果基本一致,均与MSRE实验数据符合较好;实时性测试数据显示,平台具有良好的实时性能。ThorTypography适用于液态燃料熔盐堆系统实时建模与仿真,能够为熔盐堆设计、运行和安全分析提供有效的支持。

[Background]Nuclear power simulation technology has been widely applied in areas such as reactor design,safety analysis,independent safety evaluation,accident mitigation measures,design and optimization of control and protection system,verification of advanced main control room design,and operator training.This technology has effectively improved the safety and economy of nuclear power plants.[Purpose]This study aims to develop a real-time modeling and simulation platform for a liquid-fueled molten salt reactor(LF-MSR)based on the open-source and open architecture of the experimental physics and industrial control system(EPICS).[Methods]First,the real-time interaction function of the LF-MSR system code,RELAP5-TMSR,was improved,and the control and protection system and human-machine interaction interface were extended.Then,the ThorTypography simulation platform was preliminarily developed for LF-MSR by integrating the above three main functional modules.Finally,ThorTypography was validated using the pump start-up experiment,pump coast-down experiment,natural circulation experiment,and reactivity insertion experiment from the Molten Salt Reactor Experiment(MSRE)as the benchmark.[Results]The test results of ThorTypography are consistent with the calculation results of RELAP5-TMSR and are in good agreement with the MSRE data.Moreover,the total simulation time is consistent with the total physical problem time.[Conclusions]ThorTypography is suitable for real-time modeling and simulation of LFMSR systems and can provide effective support for LF-MSR design,operation,and safety analysis.