The radioactive gases released from the air-cooled reactor gave the program its "bad breath" reference.

No air-cooled reactors have been built since.

It was a graphite moderated, air-cooled reactor and used 11,500 natural uranium fuel aluminium-clad rods inserted into 676 horizontal fuel channels.

GLEEP (Graphite Low Energy Experimental Pile) was a low power (3 kilowatt) graphite-moderated air-cooled reactor.

Annealing of graphite moderator at a military air-cooled reactor caused the graphite and the metallic uranium fuel to catch fire, releasing radioactive pile material as dust into the environment.