[en] The salient features of a tentative configuration for a fuel handling system were evolved in connection with the joint Oak Ridge National Laboratory-Westinghouse The Next Step (TNS) Tokamak preconceptual design studies. The tritium-fuel system comprises seven main subsystems: tritium storage and supply, fuel fabrication and delivery, vacuum system spent fuel reprocessing, cryogenic distillation, detritiation of secondary containment sweep gas, surface cleanup processing, and reactor-cell-atmosphere cleanup. Additionally, the tritium system has close tie-ins with other systems such as neutral-beam deuterium injection; torus vacuum pumping, including a divertor if this is required for impurity control; radioactive waste treatments; ventilation of experimental areas; vacuum vessel and shielding coolants; and central instrumentation and control