Dangers of radioactive uranium mill tailings
Potential hazards from uranium mill tailings League of individuals for the environment 11 Jan 2010
1994, Feb. 14 Olympic Dam, Roxby Downs, South Australia WMC Ltd. leakage of tailings dam during 2 years or more release of up to 5 million m3 of contaminated water into subsoil ?
Radionuclides contained in uranium tailings emit 20 to 100 times as much gamma-radiation as natural background levels on deposit surfaces. Gamma radiation levels decrease rapidly with distance from the pile.The radium-226 in tailings continuously decays to the radioactive gas radon-222, the decay products of which can cause lung cancer. Some of this radon escapes from the interior of the pile. Radon releases are a major hazard that continues after uranium mines are shut down…..
Tailings deposits are subject to many kinds of erosion……
When the surface of the pile dries out, the fine sands are blown by the wind over adjacent areas……
Seepage from tailings piles is another major hazard. Seepage poses a risk of contamination to ground and surface water. Residents are also threatened by radium-226 and other hazardous substances like arsenic in their drinking water supplies and in fish from the area. The seepage problem is very important with acidic tailings, as the radionuclides involved are more mobile under acidic conditions.
Tailings dams are often not of stable construction. …………………1994, Feb. 14 Olympic Dam, Roxby Downs, South Australia WMC Ltd. leakage of tailings dam during 2 years or more release of up to 5 million m3 of contaminated water into subsoil ?…
League of Individuals for the Environment, Inc.
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