Fusion. Rosatom engineers have developed a concept design for a ‘reactor technology’ tokamak (TRT). This is one of the most important stages in developing an operational prototype of a pilot commercial fusion reactor. The concept design outlines fundamental solutions providing a general idea of the TRT structure, operating principles, dimensions and expected performance substantiated by data estimates. TRT is a tokamak featuring a long discharge pulse, strong magnetic field and electromagnetic system made of high-temperature superconductors. Its design provides for the possibility of deuterium-tritium plasma sustainment. “When brought to life, this reactor design will constitute an almost unlimited source of clean and safe energy and will significantly reduce dependence on fossil fuels and greenhouse gas emissions,” said Sergey Gertzog, Director General of the Efremov Research Institute of Electrophysical Equipment (NIIEFA).