After reading about acirculatingwater cooling cap that was used in a University of Pittsburgh School of Medicine sleep study, the girls set about creating a cheaper, lighter, and less onerous solution the cooling headband.
The gravity-based system responded as it was designed to, circulatingwater and steam in a continuous loop to keep the scale-model reactor at a safe temperature automatically.
Once emitted, it persists in the environment for a long time - circulating through air, water, soil and living organisms - and can be dispersed over vast distances.