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United States nuclear power plants do not use graphite for operation and thus the answer is "none". Graphite is used in some reactor designs as a "moderator", which is the reactor feature that slows down neutrons so that the chain reaction will continue. US nuclear plants are "light water reactors" which means that they use regular water as the moderator. Canadian plants, for example, are "heavy water" plants which use duterium as a moderator. Chernobyl, the Ukranian plant that exploded in the 1980's, used graphite as a moderator.

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16y ago
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15y ago

A large PWR or BWR will contain about 75 tonnes of uranium fuel, and will change roughly 25 tonnes every refuelling outage which is about every two years.

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Q: How much graphite is used in a nuclear power plant per year?
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