Thermal-hydraulic computation and analysis for helium cooling ceramic blanket of HCCB-DEMO

With the development of HCCB-DEMO blanket technology, an updated conceptual design of helium cooled blanket with ceramic breeder was proposed. Based on 3D FEM software ANSYS CFX, thermal-hydraulic analysis including first wall model, breeder unit model, stiffen grid model and integration model for HCCB blanket is presented in this paper. The results demonstrate that the maximum temperature of each material is in design limits; inlet/outlet temperature of coolant is 300/500 ℃ under the independent analysis of sub-components, which indicate that the design requirements are satisfied. Comparing with three independent analysis models, the integration results showed that the thermal interaction between first wall and Be pebble bed have important influence; the maximum temperature of Be pebble bed exceeded the design limits. A series of optimization design for HCCB blanket focused on these problems would be the next step. (authors)