Dose rate analysis for the diagnostic generic equatorial port plug in the ITER port plug test facility

Abstract

The port plug test facility (PPTF) in the ITER hot cell building (HCB) will be used to test activated equatorial port plugs (EPP). The design of the PPTF and the HCB walls adjacent to the PPTF aims to have the docking room, which is next to the test tank room containing the PPTF, having as low as reasonable dose rate of 25μSv/h. In this work, the R2Smesh approach, developed by KIT for the determination of shut-down dose rate distributions in and around activated components, was used to provide high resolution maps of dose rate distributions in the test tank room, the docking room and the service room, assuming an activated diagnostic generic equatorial port plug (GEPP) module in the PPTF. The results show that the shielding is not enough with the preliminary PPTF and rooms design. A design optimization was performed in order to improve the radiation shielding around the PPTF. The results show that with an optimized design dose rates less than 25μSv/h can be achieved in the docking room and the service room.