Clay is dispersed in water, where it forms very small, porous plates.
2.
Once the vortex develops, fissile fuel can be injected through the semi-porous plate to bring the reactor critical.
3.
ESTASI method can be applied to a wide range of geometries, e . g . samples in capillary, in a disposable pipette tip, in a polymer microchannel and in micro-, nano-liter droplets on a polymer or porous plate.