Unknown groundwater started breaking into common pool as storage facility of SFP4 fuel

Contaminated groundwater has started breaking into common pool, to where Tepco is transferring the fuel assemblies from Reactor4 pool.

From Tepco’s announcement of 7/3/2014, they found groundwater was leaking into the basement floor of common pool building from 3 points of through-hole for piping.

They state the water is drained from the floor funnel to contaminated water circulating system.


The water is reported to be just groundwater, however it is contaminated.

Cesium-134 density : 21,000 Bq/m3

Cesium-137 density : 60,000 Bq/m3

All β nuclide density : 170,000 Bq/m3


It is not clear why the contaminated groundwater suddenly started breaking into the common pool.

However Tepco had stopped transferring fuel assemblies from SFP 4, two days before this announcement. The reason is supposed to be the annual inspection of on-premises transportation container and the cranes.

Tepco is not commenting they postponed this announcement until they suspended fuel transfer for annual inspection.

The fuel transfer is planned to restart this September.







You read this now because we’ve been surviving until today.


Français :

Des eaux souterraines inattendues s’écoulent dans la piscine commune servant à vider la SFP4 de ses assemblages


Des eaux souterraines ont commencé à s’écouler dans la piscine commune, là où Tepco transfère les assemblages de combustibles de la piscine du réacteur 4.
Selon le communiqué de Tepco du 3 juillet 2014, ils ont découvert que des eaux souterraines s’infiltrent par le bas dans le bâtiment de la piscine commune en 3 points, des trous servant à faire passer des tuyaux.
Ils affirment que l’eau provient du sol du tunnel du système de circulation des eaux radioactives.

L’eau est rapportée comme étant de simples eaux souterraines, radioactives néanmoins.
Radioactivité en césium 134 : 21 000 Bq/m³
Radioactivité en césium 137 : 60 000 Bq/m³
Radioactivité β : 170 000 Bq/m³

On ne sait pas pourquoi des eaux souterraines radioactives se mettent soudain à s’infiltrer dans la piscine commune.
Néanmoins, Tepco a arrêté de transférer les assemblages de combustible de la SFP4, deux jours avant ce communiqué. La raison est soi-disant l’inspection annuelle des conteneurs de transport sur site et des grues.
Tepco ne déclare pas avoir repoussé ce communiqué  jusqu’à après la suspension des transferts de combustibles à cause de l’inspection annuelle.
Ces transferts sont prévus reprendre en septembre prochain.


Vous pouvez lire ceci parce que nous avons survécu jusqu’à aujourd’hui.

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.


July 2014