Groundwater coming up in seaside of Reactor 2 again / Overflowing up-ground around 18th December

The groundwater level is observed to be coming up at least in 4 borings in seaside of Reactor 2. Fukushima Diary found the trend in Tepco’s data released on 11/14/2014.

In the summer of 2013, the crucial increase in groundwater level was observed as Tepco built the underground wall beside the sea in order to stop groundwater flowing to the port. Tepco provisionally installed pumps to reduce the groundwater volume to stop it rising up. (cf, Tepco “In the worse scenario, groundwater may overflow to up-ground” [URL])


From Tepco’s report, water level data of 4 borings have been indicating the constant increase since the end of October. Tepco releases water level data only about these 4 borings so there is a possibility that groundwater is rising up in the entire area of Reactor 2 seaside.

There was approx. 10 mm rainfall on 11/2/2014, however groundwater started rising since before the rain and it didn’t affect the increasing trend at all.

At this moment Tepco and none of mass media made any announcement about this trend. However from Fukushima Diary’s simulation, the groundwater constantly rises by 8cm everyday. If there is no change in the trend, it would reach up-ground within 35 days and 2 hours, when will be late night of 12/18/2014.


2 Groundwater coming up in seaside of Reactor 2 again : Overflowing up-ground around 18th December


Related article.. Tepco to pump up accumulating groundwater by the end of August / Tepco “Groundwater may overflow” [URL 2]




Français :

Les eaux souterraines remontent sur le côté mer du réacteur 2 / La surface sera inondée vers le 18 décembre


On observe que le niveau des eaux souterraines monte dans au moins 4 puits de forage sur le côté mer du réacteur 2. le Fukushima Diary a découvert cette tendance dans les données de Tepco publiées le 14 novembre 2014.
Pendant l’été 2013, l’augmentation critique du niveau des eaux souterraines avait été observé alors que Tepco construisait le mur souterrain sur le côté mer pour les empêcher de s’écouler vers le port. Par anticipation, Tepco avait installé des pompes pour en réduire le volume afin d’arrêter cette montée. (cf. Tepco : “Au pire scénario, les eaux souterraines vont totalement submerger le sol”)

Selon le rapport de Tepco, les données issues de 4 puits montrent une augmentation continue du niveau depuis la fin octobre. Tepco ne publie les données que de ces 4 puits, il est donc possible que les eaux soient en train de monter sur tout le côté mer du réacteur 2.
Il y a eu environ 10 mm de pluies le 2 novembre 2014, or les eaux ont commencé à monter avant ces pluies et elles n’ont pas influé sur la vitesse de cette montée.
Pour le moment ni Tepco, ni aucun grand média n’en a parlé. Néanmoins, les eaux souterraines montent de façon constante à un rythme de 8 cm par jour. Sselon la simulation du Fukushima Diary, s’il n’y a aucun changement à ce rythme, elles devraient déborder en surface dans 35 jours et 2 heures, soit à la fin de la nuit du 18 décembre 2014.

2 Groundwater coming up in seaside of Reactor 2 again : Overflowing up-ground around 18th December

Article lié : Tepco va pomper les eaux souterraines qui s’accumulent d’ici fin-août / Tepco : “Les eaux souterraines peuvent déborder”

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.


November 2014