[Groundwater] Tepco “Cs-134/137 density decreased after filtration”

Following up this article..[Groundwater] Cs-134/137 density jumped 1.2 times much as one day before, “33,000,000 Bq/m3, highest ever again” [URL]

On 7/10/2013, Tepco showed Cs-134/137 density can be decreased by filtration treatment. They state the groundwater sample included ground substances.


Sample 1

Sampling date : 7/8/2013

(Before filtration → After filtration)

Cs-134 : 9,000,000 Bq/m3 → 94,000 Bq/m3

Cs-137 : 18,000,000 Bq/m3 → 190,000 Bq/m3


Sample 2

Sampling date : 7/9/2013

(Before filtration → After filtration)

Cs-134 : 11,000,000 Bq/m3 → 130,000 Bq/m3

Cs-137 : 22,000,000 Bq/m3 → 270,000 Bq/m3


Residue after filtration of sample 2

Cs-134 : 10,000,000 Bq/m3

Cs-137 : 20,000,000 Bq/m3


However, Tepco excludes all β nuclides from nuclides to analyze apart from the filtered sample 2.

We therefore cannot know if the high readings of all β nuclides are due to the ground substance.

[Groundwater] Tepco "Cs-134/137 density decreased after filtration"

(cf, 600,000,000 Bq/m3 of Tritium from groundwater, Tepco doesn’t analyze the groundwater for Strontium-90 [URL 2])





Thank you for your support. Monthly donation is also very helpful !


Français :

[Eaux souterraines] Tepco : “La densité en césium 134/137 a diminué après filtration”


Article lié : [Eaux souterraines] La concentration en césium 134/137 multipliée par 1,2 en 24 heures. Nouveau record : 33 000 000 Bq/m³

Le 10 juillet 2013, Tepco montre que la concentration en Cs 134/137 peut être réduite par un traitement de filtration.
Ils affirment que l’échantillon d’eau souterraine comportait des éléments du sol.

Échantillon 1
Date : 8 juillet 2013
(Avant filtration → Après filtration)
Cs-134 : 9 000 000 Bq/m³ → 94 000 Bq/m³
Cs-137 : 18 000 000 Bq/m³ → 190 000 Bq/m³

Échantillon 2
Date : 9 juillet 2013
(Avant filtration → Après filtration)
Cs-134 : 11 000 000 Bq/m³ → 130 000 Bq/m³
Cs-137 : 22 000 000 Bq/m³ → 270 000 Bq/m³

Résidus après filtration de l’échantillon 2
Cs-134 : 10 000 000 Bq/m³
Cs-137 : 20 000 000 Bq/m³

Ceci étant, Tepco a exclus tous les  β nucléides de ceux à analyser en dehors de l’échantillon 2 filtré.
On ne peut donc pas savoir si les hauts relevés de β nucléides sont dus aux particules de sol.

[Groundwater] Tepco "Cs-134/137 density decreased after filtration"

(cf. 600 millions de Bq/m³ de tritium dans les eaux souterraines, Tepco n’y recherche pas le strontium 90)


Merci de votre soutien. Les virements mensuels sont aussi très utiles !

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.