It had uranium-233 from breeding from thorium in other reactors.
The main problem with these things is they seem very unprofitable. The US reactor ran from 1964 to 1969 and produced a small amount of power but is still running about $10m a year in decommissioning costs. You thing you can run these things a while and think it's over but:
>Sampling in 1994 revealed concentrations of uranium that created a potential for a nuclear criticality accident, as well as a potentially dangerous build-up of fluorine gas: the environment above the solidified salt was approximately one atmosphere of fluorine. The ensuing decontamination and decommissioning project was called "the most technically challenging"...
It had uranium-233 from breeding from thorium in other reactors.
The main problem with these things is they seem very unprofitable. The US reactor ran from 1964 to 1969 and produced a small amount of power but is still running about $10m a year in decommissioning costs. You thing you can run these things a while and think it's over but:
>Sampling in 1994 revealed concentrations of uranium that created a potential for a nuclear criticality accident, as well as a potentially dangerous build-up of fluorine gas: the environment above the solidified salt was approximately one atmosphere of fluorine. The ensuing decontamination and decommissioning project was called "the most technically challenging"...