本作品已被作者Tungsten释出到公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： Tungsten无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。

This diagram demonstrates the defense in depth quality of nuclear power plants. 1st layer of defense is the inert, ceramic quality of the uranium oxide itself. 2nd layer is the air tight zirkonium alloy of the fuel rod. 3rd layer is the reactor pressure vessel made of steel more than a dozen centimeters thick. 4th layer is the pressure resistant, air tight containment building. 5th layer is the exclusion zone around the reactor.