海啸发生之后冷却系统失效导致了氢气爆炸，这把放射物吹出了核电站，注入氮气的行为就是为了防止这一悲剧再次发生。
That was to prevent a repeat of the hydrogen explosions that blew radiation out of the plant soon after cooling systems failed in the wake of the tsunami.
一旦你开始破坏核心，你就会向冷却剂中释放放射性物质，从而提高了这些物质泄露到反应堆外的危险。
Once you start damaging the core, you are then releasing radioactive material into the coolant and thereby increasing the chances that something travels outside the reactor.
如果燃料棒损坏，放射性物质会进到剩余的冷却剂中。
If the fuel rods became damaged they would release radioactive material into the remaining coolant.
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