Glossary
Defined terms
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F
F
Fast neutron
Neutron that has not been slowed to thermal energies.
F
First wall
Plasma-facing surface of a fusion vessel.
F
Fission
Splitting of a heavy nucleus.
F
Francis turbine
Medium-head reaction water turbine.
F
Fuel assembly
Bundle of fuel rods.
F
Fuel cell
Electrochemical converter of fuel to electricity.
F
Fuel pellet
Ceramic cylinder of uranium dioxide.
F
Fusion
Joining of light nuclei.
F
Fusion gain Q
Ratio of fusion power to heating power.