Uranium G21
From Tardis Wiki, the free Doctor Who reference
The blueprints to a Hydromic device are exposed to radioactive Uranium G21 particles. (COMIC: Mr. Steelman [+]Loading...["Mr. Steelman (comic story)"])
The only way to dispose of the blueprints to a Hydromic device which had been impregnated with a special metal was by bombarding them with radioactive Uranium G21 particles. Roger Lyon achieved the destruction of the plans using the reactor core of the Dunwell Atomic Research Station. (COMIC: Mr. Steelman [+]Loading...["Mr. Steelman (comic story)"])
