Assertion: heavy water | /r/MadeOf | more tritium
Facets:
value: depending upon age
type: OTHER
value: substantially
type: DEGREE
Source sentences:
text: Heavy water that has been used as a coolant in nuclear power plants contains substantially more tritium as a result of neutron bombardment of the deuterium in the heavy water (tritium is a health risk when ingested in large quantities).
text: In cases where specific double labelling by deuterium and tritium is contemplated, the researcher must be aware that deuterium oxide, depending upon age and origin, can contain some tritium.