Endoscope operation at reactor1 “Suppression chamber is broken, flooded water is hotter than PCV”

Related to this article..Tepco is planning the first endoscope operation to reactor1

On 6/26/2012, Tepco conducted endoscope operation in torus room of reactor1. Endoscope was inserted from the through-hole (5cm diameter) between the first floor and basement floor.


↓ Torus room

Endoscope operation at reactor1 "Basement floor is flooded, water is heated as inside of PCV" 2


It started at 12:00 and ended at 15:30 (3 hours and 30 minutes in total), they haven’t published the detailed data (radiation level etc..) and photos.

On their daily press conference of the day, they announced the endoscope operation suggested the basement floor, where is used to torus room is flooded and the water level is 5m 20cm (17.06 ft) from the floor. The temperature was 37℃ (98.6F) near surface, and 34℃ (93.2F) near the bottom, where the atmospheric temperature was 28℃ (82.4F)

At 5:00 of 6/27/2012, the temperature in PCV is 34.5 ~ 36.2 ℃ [LINK]

Endoscope operation at reactor1 "Basement floor is flooded, water is heated as inside of PCV"


The flooding water in torus room turned out to be hotter than inside of PCV.

They couldn’t identified the broken part of the suppression chamber, and couldn’t take the sample of water because the radiation level was too high to work for long.


 ↓ 3:30 ~

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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.