Pressurization and Leak Testing of Sample-Return Canisters

A technique that involves pressurization with a radioactive gas has been proposed to solve two problems associated with canisters used to transport samples from remote bodies (planets, moons, asteroids, or comets) back to Earth. The canisters must be sealed at the sampling locations. The problems are how to test the canisters for leakage during transit and how to prevent buckling of the containers from the onset of atmospheric pressure upon return to Earth. The solution to these problems could also be adapted to use on Earth to ensure the integrity of canisters used to store material specimens for long times and to prevent the collapse of sealed canisters that must be brought to or stored at pressures higher than those at which the samples are sealed inside.