TEPCO was pointed out that the explosion that damaged the building in the accident at the Fukushima Daiichi Nuclear Power Station may have contained flammable gas in addition to hydrogen, which was the main cause. It has been revealed that a test to investigate the cause of the outbreak will start next month.
In the accident at the Fukushima Daiichi nuclear power plant, a meltdown occurred in which nuclear fuel melted down, causing hydrogen explosions at Units 1, 3, and 4, but the Nuclear Regulatory Commission analyzed the images that captured the explosion and burned it. It is estimated that it may have contained a flammable gas different from hydrogen based on the color of smoke and smoke.
Based on this, TEPCO presented a test plan at the meeting of the Regulatory Commission on the 19th, saying that it would investigate the effects of the materials and equipment used in the reactor building when exposed to high temperatures.
Specifically, we plan to place the heat insulating materials for cables, paints, and pipes, which are considered to be the sources of flammable gas, in a high temperature environment of 200 to 1000 degrees Celsius, and confirm the type and amount of gas generated by tests. , I'm planning to start next month.
The Regulatory Commission is considering measures to prevent explosions caused by flammable gases other than hydrogen and introducing them into regulatory standards, and if it is to be deliberated in the examination necessary for restarting, it is in operation. Since additional measures are required for the nuclear power plant, it may affect the operation of the nuclear power plant.