Научно-методический семинар

The conditions which maximize the efficiency of an accelerator driven systems (ADS) were analyzed through simulation with the toolkit Geant4. The influence of particle beam, accelerator type, target geometry and composition are studied, searching for the conditions which ensure high energy gain, safe exploitation and deeper burning of the actinides, with longer periods between refueling. A core with criticality coefficient k_eff of 0.985-0.988, lower enrichment, converter of beryllium with radius 10-20 cm and length 110-120 cm represents a proper choice. The advantage of ion beams from ⁷Li and ²⁰Ne with energies from 0.25 AGeV to 0.75 AGeV is underlined.

A proposal for the design of a target dedicated to the experimental study is presented. The target consists of rods from enriched U (5-10 % ²³⁵U) distributed in 6-8 layers inside a cylinder from Pb or graphite, with length 150 cm and radius 70 cm. The central part of cylinder is empty, allowing the placement of different converters.