一いち次じ冷れい却きゃく水すい

noun

primary cooling water

Technical term used in nuclear engineering and industrial cooling systems; refers to the water that directly removes heat from a reactor core or primary heat source.

• 原げん子し炉ろでは、一いち次じ冷れい却きゃく水すいが炉ろ心しんの熱ねつを運はこび出だす。

  In a nuclear reactor, the primary cooling water carries heat away from the core.