First UK atom bomb testIn 1952, “Hurricane,” the first British atomic bomb was tested at the Monte Bello, Australia, becoming the third country in the world to test such a weapon. The bomb used an improved plutonium implosion bomb similar to the U.S. "Fat Man". The bomb used plutonium produced in Britain at Windscale (now Sellafield) with a low Pu-240 content since hurried production led to short irradiation times, plus some Canadian origin plutonium. To test the effects of a ship-smuggled bomb (a threat of great concern at the time), Hurricane was exploded inside the hull of the HMS Plym (1450 ton frigate) which was anchored in 40 feet of water 400 yards off shore. The explosion, 9-ft below the water line, left a saucer-shaped crater on the seabed 20-ft deep and 1,000-ft across. |
