All nuclear power reactors in Canada are CANDU (Canadian Deuterium-Uranium) reactors.
These pressurized heavy water reactors use natural uranium as fuel and heavy water as a coolant and moderator.
What is CANDU.
CANDU ® stands for "CANada Deuterium Uranium".
It's a Canadian-designed power reactor of PHWR type (Pressurized Heavy Water Reactor) that uses heavy water (deuterium oxide) for moderator and coolant, and natural uranium for fuel.
Each one of the CANDU reactors produces on the order of 1,000 megawatts of electricity per unit.
And so an SMR or a small modular reactor is anything that is sort of less than a third the size of the CANDU.