Research of Simulator for Predicting Quake-Proof Capability of Nuclear Power Plants

近年来，由于对全球变暖和能源安全的严重担忧，核能的重要性再次得到认识。验证老化核电站在大地震作用下的安全能力是关键问题之一。在这项研究中，我们开发了一个定量预测核电站实际功能极限的模拟器。在这项研究中，我们考虑了东京电力公司和日立公司提供的沸水反应堆(BWR)模型。开发了在地球模拟器上高效地进行大尺度模型地震分析和可视化的系统。此外，开发了一种将线性多点约束(MPC)集合融入平衡区域分解法中的方法。用MPC3开发支持装配结构仿真的工具。在不可压缩流动分析程序中引入移动边界条件。在不可压缩流动分析程序中引入热分析。弹性应力分析显式动力学求解器的改进6。脆性断裂数值分析方法的发展7。迭代分区耦合算法的研究与开发8。开发了具有耦合器的耦合分析引擎。完成了支持热水堆设计和开发的系统开发。

Recently importance of nuclear energy has been recognized again due to serious concerns of global warming and energy security. It is one of the critical issues to verify safety capability of ageing nuclear power plants subjected to big earthquake. In this research, we develop a simulator of quantitatively predicting actual function limit of nuclear power plants.In this research, a Boiled Water Reactor (BWR) model that is offered by Tokyo Electric Power Company and Hitachi, Ltd. is considered. The finite element model contains 200 million DOE The system that seismic analyses and visualizations for large scale models are performed efficiently on the Earth Simulator was developed.Furthermore,1. Development of a method by which to incorporate a set of linear multipoint constraints (MPC) into the Balancing Domain Decomposition method2. Development of tools to support the simulation of assembly structures with MPC3. Introduction of moving boundary condition to the program of incompressible flow analysis4. Introduction of thermal analysis to the program of incompressible flow analysis5. Improvement of the explicit dynamics solver for elastic stress analysis6. Development of a method for a numerical analysis of brittle fractures7. Research and development of an iterative partitioned coupling algorithm8. Development of coupled analysis engine with couplerwere done. Development of the system that supports design and development of BWR was completed.