The leaking highly contaminated water may collapse Tepco’s countermeasure for ground water

Having 400 tones of ground water flow into the plant everyday, Tepco is planning to control the water volume by using the bypass.

They made 12 holes upstream of the ground water in order to pump up water before it flows into the plant.

(cf, [Analysis] J gov can take over Tepco for the decommissioning work of Fukushima with a major legal reform [URL])

However, 3 of 7 reservoirs are leaking highly contaminated water since before the beginning of April.

According to Tepco’s map, at least 4 of 12 ground water bypasses are located between the leaking reservoirs and the sea.

On 4/15/2013, Fukushima Diary reported high level of chloride was detected from “observation holes”, but the holes were these ground water bypasses. The leaking highly contaminated water may reach the “bypass hole / observation hole” by penetrating underground.

(cf, [Underground contamination?] High level of chloride concentration detected between the leaking reservoirs and sea [URL 2])

About this bypass plan, Tepco stated they were going to analyse the water but not purify it before discharging it to the sea.

It’s on the assumption that the ground water pumped up from these bypasses are not contaminated.


↓ The location of the observation holes

The leaking water may hit the ground water bypass


↓ The location of the ground water bypass. They are the same holes of the “observation holes”.

2 The leaking water may hit the ground water bypass



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Français :

Les fuites d’eaux extrêmement radioactives peuvent effondrer les contres-mesures de Tepco pour protéger le sous-sol


Avec 400 tonnes de débit quotidien d’eaux souterraines, Tepco prévoie de contrôler leur volume par pontages-dérivations.

Ils ont foré 12 trous en amont du flux souterrain pour pomper l’eau avant qu’elle n’inonde la centrale. (cf. [Analyse] Le gouvernement japonais peut prendre le contrôle du démantèlement de Fukushima avec une grande réforme juridique)
Cependant, 3 des 7 réservoirs fuient leur eau extrêmement radioactive depuis le début du mois d’avril.
Selon la carte de Tepco, au moins 4 des 12 pontages d’eau souterraine sont situés entre les réservoirs qui fuient et la mer.

Le 15 avril 2013, le Fukushima Diary rendait compte des hautes concentrations en chlorures détectées dans les “trous d’observation”, or ces trous sont ceux de ces pontages d’eaux souterraines. Les eaux extrêmement radioactives peuvent atteindre les “trous de pontage / d’observation” en s’infiltrant par le sol. (cf. [contamination en sous-sol ?] Des concentrations élevées en chlorures relevées entre les réservoirs percés et la mer)

Sur son plan de pontage-dérivation, Tepco a affirmé qu’ils allaient analyser l’eau mais sans la purifier avant de la déverser en mer.
C’est sur l’hypothèse que l’eau souterraine pompée par ces trous de pontage ne sont pas contaminées par ces eaux extrêmement radioactives.

↓ Localisation des trous d’observation

The leaking water may hit the ground water bypass

↓ Localisation de ceux de pontage. Ce sont les mêmes que ceux “d’observation”.

2 The leaking water may hit the ground water bypass

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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.


April 2013