Radioactive substances may find their method to water that is drinking atomic energy power sources plus the mining of radioactive materials, in addition to naturally occurring radioactive materials (Davis, 2010;
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Radioactive substances are atoms that decay obviously. They could produce alpha particles, beta particles and gamma radiation. Unlike X-ray sources they can not be deterred, so their control is much more difficult. Sources for commercial radiography such as for instance iridium 192 are emitters of gamma radiation in addition they may be used to radiograph dense chapters of metal along with other metals.