Abstract

As an important part of the ITER gas injection system, the fusion power shutdown system delivers large quantities of gas into the vacuum vessel to stop the fusion power in an emergency case. Two identical but independent units are designed for mutual redundancy. Each unit includes an injection pipeline and a unit that contains a gas reservoir, solenoid valve, pneumatic isolation valve, and pressure switches. Among these components, the working gas reservoir parameters are investigated by experiments based on the required total gas quantity of at least 3000 Pa m³ neon or mixtures of neon and hydrogen injected within 3 s. The working gas is released utilizing a pneumatically actuated valve that is not affected by the strong stray magnetic field of about 0.205 T. The associated solenoid valve is equipped with magnetic shielding that is designed by a magnetostatic analysis. These components lie on the same plane in the unit to maximize the maintainability. Furthermore, the structure integrity of the unit and its support frame is validated by a preliminary structural analysis.

摘要

作为ITER气体注入系统的重要组成部分，聚变电源关闭系统将大量气体输送到真空容器中，以在紧急情况下停止聚变电源。设计了两个相同但独立的单元，以实现相互冗余。每个单元都包括一个注入管线和一个单元，该单元包含一个储气罐，电磁阀，气动隔离阀和压力开关。在这些组件中，基于所需的至少3000 Pa m ^3的总气体量，通过实验研究了工作气藏参数在3 s内注入氖或氖和氢的混合物。使用气动阀门释放工作气体，该阀门不受约0.205 T的强杂散磁场的影响。相关的电磁阀配备有通过静磁分析设计的磁屏蔽。这些组件位于设备的同一平面上，以最大程度地提高可维护性。此外，通过初步的结构分析可以验证单元及其支撑框架的结构完整性。