Nuclear power stations use the nuclear energy stored in nuclear fuel to increase the temperature of water. Which of the water's energy stores increases?

The energy store of the water that increases in a nuclear power station is its thermal (heat) energy store. Here's the step-by-step process:

1. Nuclear energy stored in nuclear fuel is released in the nuclear reactor of the power station. This is typically done through a process called nuclear fission, where the nucleus of an atom is split into two smaller parts.

2. The released energy is in the form of heat. This heat is used to increase the temperature of water in the power station.

3. As the temperature of the water increases, the water's thermal energy store increases. This is because thermal energy is directly related to temperature - the higher the temperature, the more thermal energy is stored.

4. This thermal energy is then used to produce steam, which drives a turbine connected to a generator, producing electricity.