Tepco plans to manually repair access hole to the inside of Reactor 1

On 9/24/2015, Tepco announced they are going to start the investigation on Reactor 1.

In order to evaluate the feasibility of manual repair of the access holes to the inside of PCV 1 (Primary Containment Vessel of Reactor 1), Tepco is going to investigate 4 rooms on the first floor of Reactor 1 building.

The electric penetration hole and steam penetration holes require human workers for welding and are situated in those 4 rooms.

The atmospheric dose is over 50 mSv/h around those rooms. The dose inside the rooms are not reported yet. Beside one of those rooms, over 1 Sv/h was detected.






Français :

Tepco prévoit de réparer manuellement la trappe d’accès à l’intérieur du réacteur 1


Ce 24 septembre 2015, Tepco annonce qu’ils vont commencer l’exploration du réacteur 1.

pour évaluer la faisabilité de la réparation manuelle de la trappe d’accès à l’intérieur de la PCV 1 (enceinte de confinement primaire du réacteur 1), Tepco va explorer 4 des pièces du premier étage du bâtiment réacteur 1.
Les trous de passage électrique et d’injection de vapeur exigent que les soudeurs humains soient situés dans ces 4 pièces.
La radioactivité ambiante est supérieure à 50 mSv/h autour de ces pièces. La radioactivité ambiante à l’intérieur n’est pas encore précisée. On a relevé plus de 1 Sv/h A côté de l’une de ces pièces.


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.


September 2015