原げん型けい炉ろ

noun

prototype reactor

Technical term used in nuclear engineering for a reactor built to test and demonstrate a new design before commercial deployment.

• 日本にほんは高こう速そく増ぞう殖しょく原げん型けい炉ろ「もんじゅ」を建けん設せつした。

  Japan built the fast-breeder prototype reactor 'Monju'.