Tritium source terms for fusion power plants

Uncertainties in modeling of consequences of tritium release from fusion reactors. Plasma Fusion Center No. PFC/TR-79-5

“…For example , the remaining unburned fraction of the input tritium to the plasma varies from 450% for inertial confinement schemes to %95% for magnetic schemes. Typical throughput ranges from [27].…”

“…An estimate for the TFTR system is an efficiency of 99.9% [26], or a reduction in the release path by 10-3. ENWL·estimates that the accumulated solid wastes might be about 1 -10 Ci/day [27] .…”

“…However, high tritium concentration increases permeation rates as well as the possible exposure to workers from maintenance [2,25,31]. The waste from the blanket separation systems will likely be of solidform [27]. Thus, the best system would be one with high efficiency (producing smaller amounts of solid wastes) at lower tritium concentration.…”

“…Solid waste accumulation is very uncertain, but should not be much worse than that from the plasma exhaust system [27].…”

“…The other case is the use of some other non-blanket material as a coolant, usually this means helium. An example is a helium primary coolant which passes heat to a water-steam secondary loop which runs the turbine [27]. The two cases can be shown in Figure 2.3.…”