By applying the thermal boundary conditions obtained by neutronics simulations for the DEMO reactor, results of finite element calculations of the breeder unit are analyzed in views of thermal hydraulics and thermal stress to identify the adherence to maximum temperatures in structural and functional materials and the abidance by the stress criterion imposed by the structural material.
The damage assessment procedures need to take into account the highly non-linear behaviour of the structural materials, characterised by brittle cracking and consequent stress redistribution, and the important effect of soil structure interaction.
For complex loading conditions, the behavior of the structural materials is determined by damage evolution, strain rate and temperature.
And after 50 years of cooling, most of the structural materials can be recycled by simple remote operation.
The main design objective is to obtain efficient blanket performance by limiting the structural material temperature to <550 °C, the Pb Li to FMS interface temperatures within the corrosion limit of <480 °C, ceramic breeder temperatures window between 450 and 920 °C for tritium extraction and to prevent sintering of ceramic pebbles.
Comparison of magnetic field properties by changing the permeability of the structural material is investigated.
A novel set of microstructures for on-wafer stress measurement is presented, based on a lancet principle, with dedicated design for the amplification of the dimensional variations induced by the internal stress of the structural material.
At the interface of the nano-structured material and the air, an effective refractive index at any cross-section orthogonal to the direction of incident light is determined by the areal fraction of the structural material and the air [5], and the tapered SAS can make the continuous and monotonous change of the effective refractive index from air to solid surface [3, 4, 6].
Both properties depend on the structure's design but are determined by the stiffness and strength of the structural material because a good design is only a proper utilization of material properties.
By means of an optimization routine, the structural material properties were changed until average strains matched those measured by MRI.
