Organic nuclear reactor

An Organic nuclear reactor or Organic-cooled reactor (OCR) is a class of nuclear reactor in which the primary coolant or neutron moderator is an organic fluid.

Organic coolants have several advantages over light water, including low-pressure operation, decreased corrosion, however they suffer from flammability and degradation under neutron bombardment. Four demonstration organic-cooled reactors were constructed between in the mid-20th century, but the technology was never commercialized.

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