There is only one replacement rod, inside the robot invader in the dungeon. The solution to "not enough fuel" is to find a closer location for the saucer.
(see related questions)
You use the manure to power the hovercraft. The saucer Excalibur uses green fuel rods. There is a replacement you can get: inside the captured robot invader in the dungeon. To get it you have to enter Mordred's secret underground lab and enter the cell from the back way. (see related question)
fuel rods and control rods
In water reactors the fuel rods are clad with zircaloy sheaths
No, but control rods do.
The nuclear fuel rods in the BWR design in Japan are about 12 feet long.
Fuel rods are used to hold pellets of uranium in nuclear reactors. These rods are typically made of a material like zirconium to encase the uranium pellets and control the nuclear fission reactions within the reactor.
Fuel rods in a nuclear reactor start to heat up as soon as the nuclear fission process begins. This process generates heat through the splitting of atoms within the fuel rods, leading to an increase in temperature.
Fuel rods produce heat for a few years while inside a nuclear reactor. After that, they need to be replaced with fresh fuel rods to continue generating heat efficiently.
I would think not. The temperature differential could fracture the fuel rods, and you don't want that.
After nuclear fission occurs in fuel rods in a nuclear reactor, the next step is to control the reaction by regulating the rate of fission through control rods. These control rods absorb neutrons to maintain a steady and safe level of nuclear chain reactions in the reactor core.
No, control rods are not a part of the fuel assemblies in nuclear reactors. They are separate "pieces" in the core, and essentially fit in "spaces" between fuel bundles.
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