1 Sv/h in PCV of reactor2, “reaches the fatal dose in 7 hours”

On 3/19/2013, Tepco tried to investigate inside of RPV of reactor2 by the camera, dosimeter and thermometer like the picture below.

1 Sv/h in PCV of reactor2, "reaches the fatal dose in 7 hours"


Tepco was planning to put the camera on Control Rod Drive rail to reach pedestal on the bottom of RPV, but they couldn’t find the rail. It might have been blasted already.

They only took the equipment to above the grating part of the first floor of PCV.

They measured 1 Sv/h and the atmospheric temperature was 34℃. It reaches the fatal dose in 7 hours.

They had the guide pipe stuck in the pit. Because the integral dose of the workers were coming to the planned limit (3mSv),

they ended up leaving the guide pipe there. They are going to have to look into the way to pull it off, but the specific date is not determined yet.


2 1 Sv/h in PCV of reactor2, "reaches the fatal dose in 7 hours"






Français :

1 Sv/h dans la PCV du réacteur 2 : La dose fatale en 7 heures


Le 19 février 2013, Tepco a essayé d’explorer l’intérieur de la RPV (enceinte primaire du réacteur) du réacteur 2 avec camera, dosimètre et thermomètre :

1 Sv/h dans la PCV du réacteur 2 : La dose fatale est atteinte en 7 heures

Tepco prévoyait de mettre la caméra sur le rail du Control Rod Drive (ndt : appareil à déplacer les assemblages) pour atteindre le trottoir du fond de la RPV mais ils n’ont pas pu trouver le rail. Il a peut-être déjà été explosé.

Ils ont seulement amené l’appareillage au-dessus de la partie grillagée du premier étage de la PCV.

Ils ont relevé 1 Sv/h et la température de l’air était de 34 °C. On atteint la dose mortelle en 7 heures.

Ils ont vu le tuyau guide coincé dans le puits. Parce que la dose intégrale des travailleurs approchait de la limite prévue (3 mSv),
ils ont arrêté en laissant là le tuyau guide. Ils vont devoir voir comment l’en sortir, la date de cette opération n’est pas encore définie.

2 1 Sv/h dans la PCV du réacteur 2 : La dose fatale est atteinte en 7 heures


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.