Fukushima Daiichi Nuclear Power Plant Accident Niigata Prefectural Committee investigates "Efforts to find knowledge"

Fukushima Daiichi Nuclear Power Plant Accident Niigata Prefectural Committee investigates "Efforts to find knowledge" October 26, 18:49

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The Niigata Prefectural Committee, which has independently investigated the cause of the accident at TEPCO's Fukushima Daiichi Nuclear Power Station, has compiled a report and continues efforts to find knowledge about the accident during decommissioning work for the national government and TEPCO. I'm asking you to.

The technical committee of Niigata Prefecture, which is made up of experts, continued the investigation from the year after the accident and submitted a report summarizing the verification results of 10 items to the Governor of Niigata Prefecture on the 26th.

In this report, TEPCO did not use the word "meltdown" for two months after the accident, and the committee's investigation led to the clarification of TEPCO's manuals.

About this, TEPCO approved the de facto concealment five years after the accident.

In addition, regarding Unit 1 that caused the hydrogen explosion, TEPCO pointed out that the bolt that fixes the reactor lid may have loosened due to high heat and hydrogen gas may have spurted out from the gap, leading to the explosion. I can't deny it. "

In addition, regarding the reason for the power loss of Unit 1, which was the theme of the committee, there was no physical evidence, and the power was lost due to the impact of the earthquake from the verification of the arrival time of the tsunami. The possibility cannot be denied at this stage.

The Fukushima Daiichi nuclear power plant is contaminated and there are areas that cannot be investigated yet, and the report urges the government and TEPCO to continue efforts to find out about the accident as the decommissioning progresses.

Niigata Prefecture intends to use the report as one of the factors for deciding whether to agree to restart the Kashiwazaki-Kariwa nuclear power plant.

Chair "Don't deny various possibilities"

Professor Ken Nakajima of Kyoto University, who chaired the technical committee, said, "The most important feature of the technical committee is that it tried to draw lessons without denying various possibilities for accident scenarios. It will be a break, but if new findings come out in the future, I think we will have to discuss it again. "

On that basis, regarding the verification of the safety measures of the Kashiwazaki-Kariwa nuclear power plant, he said, "I don't have a sense of schedule when to put it together, but I think it depends on each committee member's awareness of the problem of how deeply to dig." We are going to focus on the verification of.

Governor of Niigata Prefecture "Discussion of Kashiwazaki-Kariwa Nuclear Power Plant"

Governor Hanazumi of Niigata Prefecture, who received the report, said, "This is a break for the verification of the Fukushima accident, and we will continue to discuss the safety of the Kashiwazaki-Kariwa nuclear power plant, which we are asking for in our original mission. I would like to ask. "

TEPCO "I want to reflect it in safety measures"

In response to the submission of the report, TEPCO said, "In the verification of the accident, we had you discuss from various perspectives, and I feel that each one is our lesson. We firmly take that lesson to the Kashiwazaki-Kariwa Nuclear Power Station. I would like to reflect this in our safety measures. "