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Radioactive scrap metal
Radioactive scrap metal is created when radioactive material enters the metal recycling process and contaminates scrap metal.
== Overview ==
A "lost source accident"〔P Ortiz, V Friedrich, J Wheatley and M Oresegun, (Lost & Found Dangers - Orphan Radiation Sources Raise Global Concerns ), ''IAEA Bulletin'' 41: 18 (1999)〕〔Greta Joy Dicus, (USA Perspectives - Safety & Security of Radioactive Sources ), ''IAEA Bulletin'' 41: 22 (1999)〕 occurs when a radioactive object is lost or stolen. Such objects may end up in the scrap metal industry, if people mistake them for harmless bits of metal.〔D M Smith, (Radioactive Material in Scrap Metal - The UK Approach ), Health & Safety Executive, Midlands Region Specialist Group〕 The International Atomic Energy Agency has provided guides for scrap metal collectors on what a sealed source might look like.〔(Could that be a sealed radioactive source? ), IAEA〕〔(Reducing Risks in the Scrap Metal Industry ), IAEA〕 The best known example of this type of event is the Goiânia accident, in Brazil.
While some lost source accidents have not involved the scrap metal industry, they are still good examples of the likely scale and scope of a lost source accident. For example, the Red Army left sources behind in Lilo. Another case occurred at Yanango where an 192Ir radiography source was lost and at Gilan, Iran a radiography source harmed a welder.〔(The Radiological Accident in Gilan ), IAEA (2002)〕
Radioactive sources have a wide range of uses in medicine and industry, it is common for the design (and nature) of a source to be tailored to the application so it is impossible to state with confidence what the "typical" source looks like or contains. For instance, antistatic devices include beta and alpha emitters: polonium containing devices have been used to eliminate static electricity in such devices as paint spraying equipment.〔(College breaches radioactive regulations ), BBC News, 12 March 2002〕 An overview of the gamma sources used for radiography can be seen at Radiographic equipment, and it is reasonable to consider this to be a good overview of small to moderate gamma sources.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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