Editing Dirty bomb (section)

==Other uses of the term==
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<!--- As stated in my previous edit summary: Restoring this section because it is linked to in at least one other article ([[List of military nuclear accidents]]).  If you want to delete it again, please add explanatory information to articles that link to it. --->
The term has also been used historically to refer to certain types of [[nuclear weapon]]s. Due to the inefficiency of early nuclear weapons, only a small amount of the [[nuclear material]] would be consumed during the explosion. [[Little Boy]] had an efficiency of only 1.4%. [[Fat Man]], which used a different design and a different [[fissile]] material, had an efficiency of 14%. Thus, they tended to disperse large amounts of unused [[fissile material]], and the [[fission product]]s, which are on average much more dangerous, in the form of [[nuclear fallout]]. During the 1950s, there was considerable debate over whether "clean" bombs could be produced and these were often contrasted with "dirty" bombs. "Clean" bombs were often a stated goal and scientists and administrators said that high-efficiency [[nuclear weapon design]] could create explosions that generated almost all of their energy in the form of [[nuclear fusion]], which does not create harmful fission products.

But the ''[[Castle Bravo]]'' accident of 1954, in which a [[nuclear weapon design|thermonuclear weapon]] produced a large amount of fallout that was dispersed among human populations, suggested that this was not what was actually being used in modern thermonuclear weapons, which derive around half of their yield from a final fission stage of the fast fissioning of the uranium tamper of the secondary. While some proposed producing "clean" weapons, other theorists noted that one could make a nuclear weapon intentionally "dirty" by "salting" it with a material, which would generate large amounts of long-lasting fallout when [[irradiation|irradiated]] by the weapon core. These are known as [[salted bomb]]s; a specific subtype often noted is a [[cobalt bomb]].