基于CODAC框架的托卡马克装置人身安全联锁系统研究

为了保护实验人员安全,避免HL-2A主机大厅在放电期间存在许多危险因素,比如高电压、危险气体、电磁辐射、电离辐射等对人身安全的危害,确保放电期间任何人不会出现在主机大厅,因此参考ITER CODAC的安全保护设计,并结合HL-2A装置的工程需要,搭建了专用的安全联锁网络,设计了一套基于EPICS的人身安全联锁保护系统;该系统采用EPICS CA协议和西门子S7nodave驱动实现了软IOC读取PLC变量,并结合SQL数据库和C#编程实现了对主机大厅门禁访问系统的控制,保障了主机大厅设备和实验人员的安全,经三年多的投入使用,该系统提高了HL-2A的安全保护级别和放电效率.

Research on Personal Safety Interlocking System of Tokamak Based on CODAC

In order to protect the safety of personal, avoid many dangerous factors in the hall of HL-2A tokamak during discharge, such as high voltage, cryogenic temperature, magnetic filed and radiation, and ensure that no one is allowed to stay in the hall during plasma discharge. With reference to the safety protection design of ITER CODAC(Control, Data Access and Communication), combined with the engineering needs of the HL-2A, a dedicated safety interlocking network was built and a set of personal safety interlock protection system based on EPICS(Experimental Physics and Industrial Control System) was designed. The system uses the EPICS CA(Channel Access) protocol and Siemens S7nodave driver to realize the soft IOC(Input Output Controller) reading PLC(Program Logical Control) variables, and combines SQL database and C# programming to realize the control of the access control system of the tokamak machine hall, ensuring the safety of the hall equipment and experiment personnel. After operation for more than three years, the system has improved the safety protection level and plasma discharge efficiency of HL-2A.