Regarding the explosion that damaged the building in the accident at TEPCO's Fukushima Daiichi Nuclear Power Station, the Nuclear Regulatory Commission said that flammable gas may have been generated in addition to the hydrogen that caused the explosion. , We will summarize measures to prevent explosions by the end of the year and consider introducing them into the regulatory standards for nuclear power plants.
In the accident at the Fukushima Daiichi nuclear power plant 10 years ago, a meltdown occurred in which nuclear fuel melted down, and the reactor building exploded due to the hydrogen generated at Units 1, 3, and 4.
As a result of analyzing the images of the explosion, the NRA estimated that it may have contained a considerable amount of flammable gas in addition to hydrogen, based on the colors of the flames and smoke.
For this reason, along with the leakage of hydrogen, summarized in the prospect of the end of the year the measures to prevent the explosion due to flammable gases other than hydrogen, decided to consider the introduction of the regulatory standards of the nuclear power plant.
If measures to prevent explosions are introduced into the regulatory standards, they will be deliberated in the examination necessary for restarting, and the electric power companies will be required to take additional measures for the nuclear power plants in operation, which may affect the operation of the nuclear power plants. I have.