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Definitions
Below is a directory of terms used in the field of nuclear power. Most of the terms have been reproduced or adapted from the United States Nuclear Regulatory Commission (US NRC) and the World Nuclear Association (WNA).
Climate change is the greatest challenge facing the world today. Long-term development planning must now include measures to deal with it.
H
Heavy hydrogen
See 'Deuterium'
High-level waste (HLW)
The highly radioactive material arising from a nuclear reaction. It can be what is left over from reprocessing used fuel, though some countries regard spent fuel itself as HLW. It requires very careful handling, storage and disposal.
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