Nuclear Reactor

29/11/2021 Vinod 0 Comments

Nuclear Reactor :-

A nuclear reactor is a device used to initiate and control a self sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation an in nuclear marine propulsion.

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Fig :-
  • The core of reactor is the site of nuclear fission. It consists the fuel elements is suitably enriched uranium.
  • The core contains a moderator to slow down the neutrons. The moderators commonly used are heavy water (D₂O) and graphite or barium oxide.
  • The core is surrounded by a reflector to reduce leakage.
  • The energy (heat) released in fission is continuously removed by a suitable coolant. For this air, water or CO₂ uses in the reactor. The coolant transfer heat to a working fluid which is turn may produce stream. The stream drives turbines and generates electricity.
  • The reactor can be shut down by means of rods (made of cadmium) that have high absorption of neutrons.
  • The whole assembly is shielded to check harmful radiation from coming out.

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