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9. Origins and behavior of tritium and carbon-14 in the environment
Tritium and carbon-14 are naturally produced by the interaction of cosmic rays with atoms in the upper atmosphere (cosmogenic origin). There is therefore a natural background of these two radionuclides
. In addition, large quantities of tritium and carbon-14 have been released into the air during atmospheric testing of nuclear weapons. These two radionuclides are also present in the effluents discharged by most nuclear facilities
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Origins and behavior of tritium and carbon-14 in the environment
Carbon-14 activity in the environment over time
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