Real-time dose assessment and visualization of radiation field for EAST tokamak

The Experimental Advanced Superconducting Tokamak (EAST) device began operation in 2006. A radiation protection work has been paid more and more attention with discharge pulse length increase. A system named radiation virtual simulation for dosimetry (RVIS) using virtual reality (VR) technology has been developed to improve the efficiency of maintenance work, and decrease the radiation exposure of maintenance personnel. The RVIS can be used to evaluate workload in radiation environments, optimize the maintenance plan and visualize three-dimensional (3D) dose rate distribution. The original 3D dose rate distribution in shielded hall was calculated rapidly to use as a basis for dose evaluation and 3D dose field visualization. The RVIS improves on the original work to give more effective dose evaluation and dynamic visualization of the dose field during EAST experiment campaigns.