[Video] Tepco investigated the inside Reactor 3 vessel / 1 Sv/h, “sediment” accumulated

According to Tepco, they implemented the first investigation of Reactor 3 PCV (Primary Containment Vessel) on 10/20/2015.

They installed 2 types of cameras, dosimeter and thermometer from the penetration hole called X-53.

As a result, the atmospheric dose was 1 Sv/h above the retaining coolant water. They gave up investigating the bottom of PCV. Tepco comments the sediment was accumulated between the wall of PCV and the grating part to stop the camera moving toward the bottom.

The sediment is not identified.

Tepco reported the water level was 6m from the bottom, which was approximately what they simulated. The water temperature was 33~35℃. No significant damage was observed.

 

 

[Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 2 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 3 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 4 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 5 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 6 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 7 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 8 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 9 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated

 

http://photo.tepco.co.jp/date/2015/201510-j/20151020-01j.html

 

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Français :

[Vidéo] Tepco explore l’intérieur de l’enceinte du réacteur 3 / 1 Sv/h, dans les “sédiments” accumulés

 

Selon Tepco, ils ont effectué la première exploration de la PCV du réacteur 3 (Primary Containment Vessel = Enceinte de confinement primaire) le 20 octobre 2015.

Ils ont fait entrer 2 types de caméras, des dosimètres et des thermomètres par la trappe de pénétration nommée X-53.
Au final, la dose ambiante était de 1 Sv/h au-dessus de du liquide de refroidissement. Ils ont laissé tomber l’exploration du fond de la PCV. Tepco déclare que des “sédiments” se sont accumulées entre le mur de la PCV et la partie grillagée empêchant la caméra de descendre jusqu’en bas.
Le sédiment n’est pas identifié.
Tepco rapporte que le niveau de l’eau est à 6m du fond, ce qui est à peu près ce qu’ils avaient estimé. La température y est de 33 à 35 ℃. Aucun dégât particulier n’a été observé.

[Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 2 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 3 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 4 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 5 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 6 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 7 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 8 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated 9 [Video] Tepco investigated the inside Reactor 3 vessel : 1 Sv:h, sediment accumulated

http://photo.tepco.co.jp/date/2015/201510-j/20151020-01j.html

About this site

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.

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