Thermal assessment of ITER generic equatorial diagnostic first wall

Abstract

Generic Equatorial Diagnostic First Wall (GEDFW) as a plasma facing component of ITER sustains heavy thermal load from plasma radiation and nuclear load. Cooling circuit of GEDFW has been proposed and meanwhile cooling performance is assessed through thermal hydraulic analysis. Heat transfer capability is regarded as an important property in GEDFW design and is usually validated by numerical analyses. Hydraulic analysis and thermal analysis were performed individually and then solved by thermal coupling. Hydraulic analysis was performed to obtain the heat transfer coefficient (HTC) and bulk temperature which were initial conditions in thermal analysis. Thermal analysis provided the wall temperature for the next hydraulic analysis iteration and the thermal hydraulic iteration proceeds until the residual of surface temperature approached preset tolerance. Temperature map obtained through thermal hydraulic analysis which has demonstrated the heat transfer capability of GEDFW.