Assessment of hypervapotron heat sink performance using CFD under DEMO relevant first wall conditions

Objectives and status of EUROfusion DEMO blanket studies

“…In the present work the performance of the wellknown Hypervapotron (HV) heat sink for a FW limiter application under DEMO operating conditions is predicted using CFD. In order to assess the performance, numerical simulations are performed using a commercial computational fluid dynamics code which was previously validated in predicting the thermal hydraulic performance of HV geometry [42]. Based on the results the potential usage of HV heat sink for DEMO reactor will be assessed.…”

Progress in the engineering design and assessment of the European DEMO first wall and divertor plasma facing components

“…This may prove to be an appropriate level for a uniform, normal scenario load; but peaked loads due to magnetic field ripple, plasma transients, wall dimensional intolerance, etc, could be an order of magnitude higher. Baseline FW concepts are based on helium and water cooling of EUROFER channels [10][11][12][13][14], which are reported to have heat flux limits of about 1 MW/m 2 and 1.5 MW/m 2 , respectively. Importantly, these limits are based on engineering analyses however they neither account for irradiated material properties nor the presence of the tungsten armour.…”

“…The FW topology and cooling channel technology [12,13] are currently an active design task and a function of the architecture as per Table 1. As in the divertor, the proposed FW armour material is tungsten, although it is expected that the thickness can be less; nominally 2mm is assumed to be sufficient although this will vary with position around the wall.…”