Nuclear reactor core
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.
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
In water reactors the fuel rods are clad with zircaloy sheaths
No, but control rods do.
Water is pumped around the fuel rods.
The nuclear fuel rods in the BWR design in Japan are about 12 feet long.
fuel rods
The fission happens in the fuel, which is usually in fuel rods inside the reactor. The rods are spaced at a particular distance apart and fill the reactor.
The fuel rods used in a nuclear reactor are made from uranium 235(U-235).
The cannot as they are inserted in holes in steel support frames that hold several dozen fuel rods. When changing fuel, complete steel support frames are switched and individual rods are not handled.