Thermal efficiency is what decides how much cooling is required in any type of steam cycle power plant. You may think that the fuel - gas, coal, or uranium plays a role but in fact this is not so. While it is true that nuclear power plants often have a slightly lower thermal efficiency than their coal counterparts, some coal plants discharge excess heat with combustion gases. Nuclear plants rely on water to perform the same operation. The Nuclear plant is also more flexible in that you can place it in a greater number of locations than coal-fired plants. This is due to the availability of fuel.
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