Tritium releases from fusion reactors were estimated for normal (nonaccident) operating conditions. The STARFIRE reactor design was used as a reference case, but the effects of alternate design choices and conditions were also addressed. Potential environmental losses were examined for each of the major tritium handling systems. Estimates of ∼20 Ci/day were made for the 1000-MW(electric) reactor, with approximately equal portions coming from the gas handling systems (plasma, vacuum, and fuel systems) and from the coolant system.