Fault Modes and Criticality Analysis of the EAST cryogenic system based on operating experience over 10 years

摘要

The cryogenic system of EAST (Experimental Advanced Superconducting Tokamak) facility has been put into operation for fourteen experimental campaigns since the first commissioning in 2005, which provides the adequate cooling power to keep the cold components of EAST Tokamak in the superconducting status. Its reliability directly influences the long time safe and steady operation of the Tokamak device. Through these years' operation, the process control flow and operational modes have been determined eventually. According to the ITER RAMI analysis approach, the fault modes of the EAST cryogenic system as well as the corresponding effects and criticality have been analyzed and assessed for its safety. The risk mitigation actions were also presented and implemented for future operation and maintenance to archive the goal of enhancing the reliability of the EAST cryogenic system.