[en] Up to 10.7 ± 0.8 MW of fusion power has been produced from deuterium-tritium (DT) fusion reactions in the Tokamak Fusion Test Reactor (TFFR). The total fusion yield from a single plasma pulse has reached 6.5 MJ. The central energy and fusion power densities in the TFTR DT plasmas are comparable to or greater than those expected in a thermalized DT reactor, such as ITER. The experiments in TFTR with DT plasmas fuelled and heated by neutral beam injection span wide ranges in plasma and operating conditions. As a result of a favorable intrinsic scaling of confinement with ion mass and through the use of lithium pellet conditioning to control the influx of material from the limiter, the energy confinement of DT plasmas in TFTR has been improved to the point where the stability of the plasma to pressure driven modes is limiting the fusion power for plasma currents up to 2.7 MA and toroidal magnetic fields up to 5.5 T. A variety of experiments has been performed to study the confinement and loss mechanisms for the energetic alpha particles from DT fusion reactions