Heavy water is water containing deuterium (D). Deuterium is an isotope of hydrogen, contains one neutron and is not radioactive, so heavy water is not radioactive.
Superheavy water is water containing tritium (T). Tritium is also an isotope of hydrogen. It contains two neutrons and is radioactive, so superheavy water is radioactive.
Neither type of water can be used to carry out life's activities.
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