Question

Most commercial nuclear power plants worldwide are cooled by

A. sodium

B. mercury

C. helium

D. water

Answer 1

Sodium and water both can be used as a coolant in nuclear reactor, but generally water is used as a cooling agent world wide

Answer 2

Answer:

The commercial nuclear power plant was cooled by Water

Option D

Explanation:

Every single nuclear power plant that was built since, the Second World War is using water as their coolant and heavy water as their moderator. More than 33% of the water is used as coolant directly in contact with the reactor which comes out in form gaseous state. About 66% are pressurized water reactors are used at a higher pressure.

Water is not only the easiest form of coolant obtained but also the cheapest form of coolant as the cost to upkeep the fuel and reactor take 90% of the cost of running the nuclear power plant, therefore, water has been the choice of coolant for a very long time.