Control Through Flow of Coolant
- Reactor coolant is used for continuously removing heat developed in the reactor core for generating steam in the exchanger. The coolant used must be fluid at operating temperature of the reactor, having high thermal conductivity in order to achieve maximum heat transfer.
- Further the coolant must be stable from stand point of dissociation by neutron bombardment or by heat.
- There are different methods of cooling the reactor, they are :
- Annular ducts surrounding or threading solid fuel elements are made and the coolant is passed through them
- By completely Immersing the reactor fuel element in the coolant bath.
- A fluid mixture of fuel and the moderator is circulated through the reactor. The serious problems of radioactivity are associated herewith.