What happens to nuclear waste?
Nuclear power stations produce dangerous radioactive waste. Scientists use half-lives to work out when nuclear waste will become safe. Elements that have long half-lives remain hazardous for many thousands of years; those with short half-lives quickly become less dangerous.
There are 3 types of waste;
Low level - used protective clothing, it is packed in drums and dumped in a lined landfill site to be disposed of.
Intermediate level - materials that have been inside reactors and may remain highly reactive for many years, it is mixed with concrete and stored in stainless steel containers to be disposed of.
High level - concentrated radioactive material from spent fuel rods, decays fast and releases energy rapidly so needs cooling, in the UK, stored in a pool of water to be disposed of.
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