It uses natural circulation, so there are no coolant pumps.

That one was for ventilation fans if the natural circulation couldn't cope with smoke or gas.

Nobody knows what the natural circulation is; I would guess 40,000 to maybe 50,000.

The pumps were shut down, and it was believed that natural circulation would continue the water movement.

Shift the reactor to natural circulation and keep that compartment quiet.

A 600-megawatt plant, engineers say, can be kept below dangerous temperatures by natural circulation, but a 1,300-megawatt plant cannot.

Can operate at lower core power density levels using natural circulation without forced flow.

A fluid system designed for natural circulation will have a heat source and a heat sink.

In a nuclear reactor, natural circulation can be a design criterion.

It is tweaked for better natural circulation in case of an accident, so there will be less reliance on pumps.