To reduce radioactive contamination.
how electricity is produced in a nuclear reactor
Most do it the same way fossil fueled power plants do: by heating water to make steam, which turns turbine/generators. The heat just comes from a different source.
The nuclear fuel either loaded in adedicatednuclear reactor or in an atomic bomb
Nuclear subs get their power from a nuclear reactor inside the sub. The reactor heats the water that produces enough steam to drive the turbines, that spins the generators, that produce electricity, that powers the motors, that drive the boat. The generators also power all other equipment that supply all the needs of the crew and the on-board systems. Nuclear subs do not need oxygen to supply the engine and can therefore stay submerged for months on end, and supply all the oxygen necessary for the crew as well as desalinated water. Were it not for food, nuclear submarines could stay submerged indefinitely.
There is a small reactor at Sydney used to produce radioisotopes. No power reactors.
how electricity is produced in a nuclear reactor
The nuclear reactor doesn't care. Only the turbines that spin the generators do.
the nuclear reactor makes steam wich drives turbines wich drive generators that make the electricity
To produce heat.
Steam from the nuclear reactor turns turbines. These turbines either turn the propeller directly or turn generators that produce electricity to power electric motors which turn the propellor.
To produce electricity
Produce heat (energy) from nuclear fission.
The pressure vessel contains the reactor core with its fuel, coolant, moderator, control elements, and emergency systems. The turbine is the device that on receiving the steam it spins and turns the electric generators to produce electricity.
The heat from nuclear fission is what generates electricity. Water is heated in a nuclear reactor, which then generates steam which is used to power electrical generators.
A nuclear reactor will do what is asked here. Use the link below to the related question about what a nuclear reactor is.
Most do it the same way fossil fueled power plants do: by heating water to make steam, which turns turbine/generators. The heat just comes from a different source.
The breeder reactor produce more fissile fuel than what is consumed while this is not the case for other nuclear reactors.