Glossary
Defined terms
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Scram
Rapid emergency shutdown of a reactor.
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Sievert
SI unit of equivalent dose.
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Smart grid
Power system with sensing, communication, and control.
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SMR
Small modular reactor.
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Solar collector
Device that captures sunlight as heat.
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Spent fuel
Fuel removed from a reactor after irradiation.
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Steam generator
Heat exchanger that makes steam in a PWR.
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Stellarator
Magnetic fusion device with 3D external coils.
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Superconductor
Material with zero DC resistance below a critical temperature.