In order to keep used fuel rods etc. cool,as they still emit a great of heat after use and unless they are constantly kept cool,it can lead to disastrous consequences.
water
A lot
Examples: water, heavy water, organic compounds, sodium, lead, helium.
To transfer the heat produced in the fuel to the steam raising units.
CFC's are used now also. they are used as coolants.
CFC are used as coolants. They react with ozone and deplete it.
Electronics are used in thermal power plants when the power from the thermal power plants are transferred to a storage source. There, electronics comes in.
AC is used in our power plants nowadays.
Electronics are used in thermal power plants when the power from the thermal power plants are transferred to a storage source. There, electronics comes in.
Geothermal power plants are used to provide power to the power distribution grid, just like other traditional power plants. Since geothermal power plants are able to run around the clock, they are used to provide baseline power, unlike many other renewable energy sources such as solar or wind.
Power plants
All fossil fuels (coal, oil and natural gas) are used in power plants.