1Water containing the normal proportion (or less) of deuterium oxide, i.e. about 0.02 per cent, especially to distinguish it from heavy water.
- Because of their heavier weight, heavy water molecules evaporate less readily than light water molecules.
- However, eddying mixing motion can overturn this density profile, momentarily lifting heavy water above light water.
- The Chernobyl reactor used graphite as moderator and boiling light water as coolant, while the Koodankulam reactor uses light water as moderator and coolant.
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