Nuclear reactors are devices used to perform chain reactions with a slow flow of neutrons generated by the combining/fusion  of heavy nuclei.they are used for different purposes based on this they are classified into  research reactors and power reactors.Research reactors are used in research centers or universities and are used to generate radiopharmaceuticals. .
Power reactors are used in nuclear power plants for generating electricity.Based on different characteristics they are further divided.Nuclear reactors are mainly used to produce thermal energy.
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