nuclear core meltdown; meltdown
Technical term for a severe nuclear accident where the reactor core melts due to overheating.
福島第一原発では、炉心溶融が起きた。
At the Fukushima Daiichi nuclear plant, a core meltdown occurred.
炉心溶融を防ぐために、冷却システムが重要だ。
To prevent a core meltdown, the cooling system is crucial.