Nuclear Fission.
Generally Uranium, but some reactors use Plutonium nuclear fission.
Nuclear energy from fission of U-235 and Pu-239
uranium. When water is heated, it causes a chain reaction that turns the uranium to plutonium.
This happens in the fuel rods, the energy released by nuclear fission appears initially as kinetic energy of the fission fragments, which is quickly turned into thermal energy as the fragments slow down and are stopped in the fuel. Thus the fuel rods heat up and transfer thermal energy to the coolant, which in most reactors is water but can be gas or liquid metal.
It releases heat through absorption of the kinetic energy of the fragments of fission in the material of the fuel rods (talking of nuclear reactors, not weapons)
The nuclear fuel is found in the fuel rods. These fuel rods are formed into fuel bundles called fuel assemblies, and together they make up the reactor core.
Nuclear energy from fission of U-235 and Pu-239
uranium. When water is heated, it causes a chain reaction that turns the uranium to plutonium.
Initially it heats the fuel rods which are encased in zircaloy tubes (in a PWR or BWR). The outer surfaces of the zircaloy tubes transfer the heat to the water coolant which is pumped past them
Do you mean spent fuel? This term is used to describe fuel rods that have insufficient energy left.
Fuel rods are the nuclear fuel in a nuclear power plant. They are used to turn water to steam, which is then used to turn a turbine. They do not "generate energy", since energy cannot be created or destroyed (E=mc^2). They are used to generate electricity, or to convert nuclear energy to electric energy.
This happens in the fuel rods, the energy released by nuclear fission appears initially as kinetic energy of the fission fragments, which is quickly turned into thermal energy as the fragments slow down and are stopped in the fuel. Thus the fuel rods heat up and transfer thermal energy to the coolant, which in most reactors is water but can be gas or liquid metal.
as it still has energy in it.
Not so much using nuclear energy as much as it is the spent fuel rods that are discarded after they are depleted. A nuclear reactor uses Uranium fuel rods that are discarded when they are no longer useful. the problem is they are highly radioactive, which is quite bad for the environment. The radioactive fuel rods (if not handled properly) can poison the surrounding area with radiation killing wildlife, and pollutiing streams and rivers and soil.
Known as fuel rods, these are hollow metal rods that contain the uranium fuel for a nuclear reactor.
fuel rods and control rods
You have a misapprehension there, it is uranium oxide that is used in fuel rods, not fossil fuel
It releases heat through absorption of the kinetic energy of the fragments of fission in the material of the fuel rods (talking of nuclear reactors, not weapons)