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breeder reactor

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nuclear reactor generating more fissile material than it consumes

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The Beloyarsk Nuclear Power Station, site of the BN-600 and BN-800, the only two commercially operational breeder reactors as of 2026

A breeder reactor is a nuclear reactor that generates more fissile material than it consumes. These reactors can be fueled with more-commonly available isotopes of uranium and thorium, such as uranium-238 and thorium-232, as opposed to the rare uranium-235 which is used in conventional reactors. These materials are called fertile materials since they can be bred into fuel by these breeder reactors.

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