noun
prototype reactor
Technical term used in nuclear engineering for a reactor built to test and demonstrate a new design before commercial deployment.
日本は高速増殖原型炉「もんじゅ」を建設した。
Japan built the fast-breeder prototype reactor 'Monju'.
実証炉 is a demonstration reactor that validates commercial feasibility, typically a step beyond a 原型炉.
Compound of 原型 (げんけい, 'prototype') and 炉 (ろ, 'furnace' or 'reactor'). The reading げんけいろ follows standard on'yomi.