This presentation is intended for a class discussion on the aspects of nuclear reactors, their parts and functions , their safety and effects in terms of fallouts.

3. Reactor type Main Countries Number GWe Fuel Coolant Moderator
Pressurised Water
Reactor (PWR)
US, France, Japa
n, Russia, China 271 270.4 enriched UO2 water water
Boiling Water
Reactor (BWR)
US, Japan,
Sweden
84 81.2 enriched UO2 water water
Pressurised Heavy
Water Reactor
'CANDU' (PHWR)
Canada 48 27.1 natural UO2 heavy water heavy water
Gas-cooled
Reactor (AGR &
Magnox)
UK 17 9.6
natural U
(metal),
enriched UO2
CO2 graphite
Light Water
Graphite Reactor
(RBMK)
Russia 11 10.4 enriched UO2 water graphite
Fast Neutron
Reactor (FBR)
Russia 1 0.6 PuO2 and UO2 liquid sodium none
Other Russia 4 0.04 enriched UO2 water graphite
TOTAL 436 399.3
Nuclear power plants in commercial operation
GWe = capacity in thousands of megawatts (gross)