Fission in a nuclear power plant is when uranium nuclei split in two. Water has many useful properties that allow nuclear power plants to do all these things. Water cools more than air because it can absorbe more heat than air. Water is the only substance that can take the form of solid, liquid or gas in the earth's normal temperature range. This is especially important because when heated water is turned to steam it can be used to generate electricity.
Water is taken in and passed over the reactors to make steam.
Then the steam is directed at high pressure at the turbines to turn them at high speed. The spinning turbines turn the 8 electrical generators that produce electricity at the Pickering Nuclear Power Plant. Diagram of a reactor showing how water cools a nuclear reactor and how it makes steam Water is also used in the storage of nuclear waste. The used uranium fuel bundles are put in water because water cools them and it is a shield against radioactivity. Canada has more water than other countries so we can use it as a cheap resource.