A water injection stop test was conducted at Fukushima Daiichi Nuclear Power Station Unit 1: 16 October, 5:16
Regarding water injection to the nuclear reactor, which continues to cool down the nuclear fuel that has melted away at the Fukushima Daiichi Nuclear Power Station Unit 1, TEPCO has conducted a test to stop water injection for about 48 hours in order to check the heat generation of the nuclear fuel. Starting on the 15th.
In Units 1 to 3 of the Fukushima Daiichi nuclear power plant that caused the meltdown, water was poured into the reactor after the accident in order to cool down the melted nuclear fuel. Currently, the reactor temperature is 20 to 30 degrees It is so stable.
In this regard, TEPCO has been conducting a series of tests using thermometers in the reactor to analyze how much nuclear fuel generates heat when water injection stops. The amount of water injection was reduced to zero.
At this time, the rise of the thermometer was less than 0.2 degrees per hour, and it was confirmed that the heat generation of the nuclear fuel was within the expected range.
For Unit 1, water injection is stopped at around 11am on the 15th and the amount of water injected is reduced to zero for approximately 48 hours until 11am on the 17th.
In addition, we will analyze the temperature change in detail and announce the evaluation results at a later date.
TEPCO also announced that it would resume nuclear fuel removal from the spent fuel pool of Unit 3 that was delayed due to equipment troubles on the 15th.