Coolant Systems on a Nuclear Reactor works by pumping large amounts of Sea Water into the reactors to cool it down and produce steam.
Sea water is used to cool nuclear reactors in emergency situations when fresh water is not available. We usually find very pure water used in nuclear reactors as a primary coolant. This water stays quite pure and retains little radiation after shutdown and cooldown. But if an emergency situation arises and the "regular" primary coolant (the fresh water) is lost, it must be replaced with any water to cool the reactor. Sea water is better than nothing.
In some reactors it is, depends on the design.
The most common coolant used in nuclear reactors is water. There are light water reactors (using "regular" water), and the heavy water kind of reactor.
So that there is a constant supply of water to cool the reactors with.
The coolant, but depending on the reactor design this can be:watermolten metala gas (e.g. air, helium, carbon dioxide)hydrocarbonsetc.
Nuclear power plants require large volumes of water to cool reactors and convert heat to electricity. Reactors use normal water, heavy water, and even newer reactors use other forms of coolant.
efficient coolant that does not act as a neutron moderator.
Sewage water. No, seriously. The cooling effect from evaporating water from the sewage of nearby communities is used to keep the circulating (extremely pure) coolant in the sealed cooling systems cool.
Water is used as coolant in most reactor plants to keep the reactor cool and prevent over heating. They do not necessarily need to be near a source of water; water just has to be available. However, a lot of nuclear reactors are build by a natural source of water so that the water can be used as an emergency source of coolant to keep the reactor covered with water in case of a rupture.
They're mostly the same, except that nuclear reactors aimed at breeding more fissile material use expensive primary coolant instead of cheap water.
P. Cohen has written: 'Water coolant technology of power reactors' -- subject(s): Boiling water reactors, Pressurized water reactors 'The realm of the submarine' -- subject(s): Submarines (Ships)