Follow these points:
The energy which is produced by a controlled chain reaction
is known as nuclear energy.
The nuclear reactors produce a large amounts of heat, in
which heat is further produced by a nuclear reactor.
The fission heats the water and create electricity that can
be fed into a grid and to consumers.
The coolant in nuclear reactors is known
as flowing water.
At the end, the nuclear reactors produce nuclear waste as
their only environmentally byproducts.
However, this nuclear power reactors are very dangerous,
which produce radioactive materials.
So, it needs to be protected from natural calamities.