Nuclear reactors are places where radio active materials are kept. They can be used for things such as medicine or they have even been used for power. However they do not come without their risks.
             One of the ways nuclear reactors are used is for medical treatments for illnesses such as cancer and leukemia. The reactor at Lucas Heights is Australia's reactor which researches and gives cancer treatment to the hospitals.
             Nuclear reactors can also be used to harness energy, they do this by using the heat that is emitted from the reactor to create steam which they use to spin turbines. An example of a nuclear power plant is Chernobyl.
             Nuclear power plants do have their risks and there have already been terrible disasters one of which being at Three Mile Island in the u.s. where the reactor had a damaged core. The reason why scientists thought that the core was damaged was because the reactors fuel was overheating and melting through the reactors thick walls made of steel and cement. When scientists found the problem they quickly found out that there was more damage then they expected. Scientists also feared that a hydrogen gas bubble would explode.
             The site around the rector was evacuated within a ten mile radius, however scientists still think that there was not enough radiation coming out of the plant to seriously harm anyone.
             Chernobyl in the Ukraine had their reactor overheat in the year of 1986. The reactor in Chernobyl was being used at the time to create power. It happened when the coolant for the reactor was not flowing properly and when the reactor overheated it caused nuclear fission which opened the walls of the reactor releasing radiation into the atmosphere. The disaster killed many and still has effect on some people today as their parents were exposed to the radiation and passed on to their children. After the disaster the reactor
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