According to NHK, Tokyo Electric issued the warning about its Fukushima Number One Plant on Saturday. It said the pressure value for the reactor’s containment vessels has risen, and that if the value is correct, the vessels could break down.
The company is considering whether to release air in the vessels outside. The air contains radioactive materials.
The company says the amount of air to be released would be small.
Earlier, the government issued an evacuation advisory to people living within a 3-kilometer radius of the Fukushima Number One plant.
Earlier the government has issued an evacuation advisory to people living within a three-kilometer radius of a nuclear power plant in quake-stricken Fukushima Prefecture.
Government officials said on Friday that no radioactive materials have leaked from the Tokyo Electric Power Company’s Fukushima Number One plant. The government also says the advisory is only a precaution, and is also asking people living within 10 kilometers of the plant to stay indoors.
The government’s Nuclear and Industrial Safety Agency says cooling system failure has made it impossible to cool the second reactor after it automatically stopped operating after the earthquake.
The plant has been declared to be in a state of emergency after the quake caused the technical failure.