An accident at a nuclear power plant or reactor, such as a radiation leak or reactor core meltdown, that can cause serious harm to people and the environment.
政府は原発事故の原因を徹底的に調査すると発表した。
The government announced it will thoroughly investigate the cause of the nuclear accident.
福島の原発事故以降、原子力発電の安全対策が強化された。
Since the Fukushima nuclear accident, safety measures for nuclear power generation have been strengthened.
原発事故が起きた場合、住民は速やかに避難指示に従う必要がある。
If a nuclear accident occurs, residents need to follow evacuation orders promptly.