How much heavy water in a candu reactor?

A CANDU (Canadian Deuterium Uranium) reactor typically contains around 1,000 to 1,200 metric tons of heavy water (deuterium oxide, D₂O) in its moderator system. This heavy water serves as both a neutron moderator and a coolant, allowing the reactor to operate efficiently using natural uranium as fuel. The exact amount can vary based on the specific design and configuration of the reactor.