Normally in a nuclear power plant the heat generated by the fission process is drawn off to produce power. A nuclear meltdown occurs when the systems responsible for doing so are damaged or fail and the fissile materials (uranium, plutonium ect) used to generate energy in the plant get hot enough to melt themselves and their containers. When this happens not only is the core of the reactor damaged, making unusable until repaired, but the radioactive fissile materials could be released in to the environment.
A nuclear meltdown will be in process releasing radioactive material
A nuclear meltdown is an informal term for a severe nuclear reactor accident that results in core damage from overheating. A meltdown occurs when the heat generated by a nuclear reactor exceeds the heat removed by the cooling systems to the point which at least one nuclear fuel plate exceeds its melting point.
This sounds like a nuclear core meltdown, reactor meltdown, or just a meltdown.
Meltdown
The byproducts from nuclear energy plants pose a threat to the environment and public health if they are not disposed of properly. There is always a small chance of a complete meltdown of a nuclear plant, which would contaminate the environment for miles around the site.
Churnoble
A nuclear meltdown will be in process releasing radioactive material
A crisis is a dangerous situation, whereas a meltdown (by analogy to a nuclear reactor) is a complete collapse. A crisis, if not handled correctly, can result in a meltdown.
coz if nuclear meltdown it can explode
It didn't explode. Three Mile Island's Nuclear Power Plant in Pennsylvania experienced an almost complete meltdown.
Worst case scenario, if the Japan nuclear reactors have a complete meltdown, then there is a possibility that the radiation can travel in the Jet Stream to the western coast of the U.S. To protect yourself from the radiation, iodine supplements are available at your local drug store.
One answer is a bomb. But taking normal nuclear reactors, the result would ultimately be fuel meltdown, what happens after that would depend on the integrity of the pressure vessel and secondary containment
a nuclear reactor had a nuclear meltdown
Under the worst possible conditions, a meltdown can occur in a nuclear submarine. It is an event of low probability, however.
A nuclear meltdown is an informal term for a severe nuclear reactor accident that results in core damage from overheating. A meltdown occurs when the heat generated by a nuclear reactor exceeds the heat removed by the cooling systems to the point which at least one nuclear fuel plate exceeds its melting point.
Chernobyl, Russia
Russia