Groundwater temperature observed rising by 25 celsius degrees

Photo: The remaining parts of Reactor 3 building. The photo was taken in June 2015. No newer overview has been updated about Reactor 3. [URL]


The temperature of the groundwater in the Fukushima plant area is observed to be rising despite the continuous efforts to freeze the ground as an impervious wall.

On the 28th of October, 2021, Tepco announced a part of the impervious wall consisting of frozen soil is possibly breached due to the rising temperature of the groundwater. The issued part is located in the Southwest of Reactor 4, the depth is reportedly 1 ~ 4 meters underground.

The impervious wall was built and maintained being aimed to reduce the groundwater flowing into the reactor buildings. Regardless of the cost and electricity consumption in order to maintain the shape, the effectiveness has been questioned from the beginning. According to Tepco, the possible breach of the wall, however, did not cause any significant change in the water level.

The rising temperature has been, in fact, monitored since August. Tepco knew the temperature rose from -15 to 10℃ through September but did not publicly report about this.
The cause has not been identified.

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This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


November 2021