The operation result of supervisory interlock system for the KSTAR 1st campaign

Abstract

The supervisory interlock system (SIS), the personal safety interlock (PSI) and the radiation monitoring system (RMS) are the safety and protection system for the KSTAR operations. The supervisory interlock system prevents men and devices from an accident and it protects auxiliary systems and the superconducting tokamak against the propagation hazardous events. SIS is collecting events of the tokamak and auxiliary systems and decides a level of the event and command to stop the actions of local I&C for the KSTAR operation. The local interlock system is self-protecting from local accidents and executing orders from supervisory interlock system. SIS had accomplished its own functions at the first campaign of the KSTAR. Even though several unexpected incidents and mismanagement had occurred, the interlock function had been properly responding. We have test result of the emergency stop function for the superconducting magnet power supplies against accidents. We measured different shutdown time of each magnet power supply, which is about 1 min, but we need to more analysis to the source of delay. We had inserted the current and density fault protection logics to stop the ECH and the ICRF at central control system through the first campaign. The short message system (SMS) had helped to restore fast of faults in local and KSTAR integrated control system (ICS). The processor regular scanning time is about 75 ms that is longer than recommended scanning time of the redundancy system. We had reduced it <20 ms by optimization of logic program during the maintenance period. This paper describes the interlock system functions of the first campaign, operation results, and update contents and results.