How Fukushima Daiichi Could End Up Fueling Cars In Japan

One of the funded research projects towards the response to the Fukushima nuclear disaster may have an unusual side effect if the project eventually goes into operation.
The Kurion tritium removal system being developed for use at Fukushima Daiichi could provide hydrogen fuel for cars in Japan. If this technology works as claimed and can be put into operation two of the byproducts would be hydrogen gas and pure oxygen. These byproducts could be captured for use as captured gas products. The hydrogen could then be sold for use in fuel cell vehicles. Kurion estimated 90,000 tons of hydrogen gas could be extracted from the contaminated water at Fukushima Daiichi.
Tritium has been a serious problem at the plant, caused by the meltdowns and leaks. The current set of decontamination systems to try to clean water are able to remove some of the contamination. Tritium has been one that can’t be removed so …

Source: Fukushima Sub

Fukushima Unit 2 Subdrain Has Larger Problem

In recent weeks TEPCO began reporting about high radiation readings in subdrain pits near the reactor buildings. TEPCO’s original intention was to begin using these to draw out contaminated water, treat this water and release it to the sea. The subdrain pits existed before the disaster to keep groundwater from infiltrating the reactor building basements.
TEPCO noted that the subdrain pit wells in this area are inter connected. They at least hinted they think this may have caused the fluctuation of contamination in some of these wells.
TEPCO tried to dismiss the problem as being caused by “fallout” and not due to leaks from the reactor buildings. Their proof was taking two samples of water, one from the subdrain pits and one from unit 2′s turbine building. Since the ratios of cesiums, beta radiation and tritium didn’t match they insisted this means the water in the subdrain pits on the other side of the …

Source: Fukushima Sub

Retained water underground temperature went up by 10℃ near Reactor 2 / Tepco “Still investigating the cause”

Following up this article.. Tepco to give up the preceding frozen wall and directly fill the trenches with cement instead [URL]

The retained water temperature went up by 10℃ on 10/29/2014 near Reactor 2. Any following data has not been announced by 11/3/2014.

Tepco had been trying to fill the underground trench with cement and grout from 10/20 to 10/29/2014.

After they injected the plastic grout material on 10/29/2014, one of the thermometers showed rapid increase in water temperature.

The thermometer is located in the upper part of the trench, where is not filled by cement yet. It was approx. -15℃ but went up to -5℃ within 24 hours.

Other thermometers are not showing large increase in temperature.

Coolant water that touched molten fuel is likely to be flowing where the issued thermometer is set. It is not known why retained water is being heated.

Tepco states they are still investigating the cause.

http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_141031_08-j.pdf

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Français :

La température des eaux souterraines retenues près du réacteur 2 est montée de 10℃ / Tepco : “On cherche encore pourquoi”

Article lié : Tepco abandonne le mur congelé et, à la place, va combler les tranchées avec du ciment

La température des eaux souterraines retenues près du réacteur 2 est montée de 10 ℃ le 29 octobre 2014. Au 3 novembre 2014, aucune donnée précise n’a été communiquée.

Tepco a essayé de combler la tranchée souterraine avec du ciment et de coulis entre le 20 et le 29 octobre 2014.
Un des thermomètres a montré une rapide montée de la température de l’eau après avoir injecté du coulis plastifié le 29 octobre 2014.
Ce thermomètre est situé dans la partie supérieure de la tranchée qui n’est pas encore comblé au ciment. On était à environ -15℃ mais elle est passée à -5℃ en 24 heures.
Les autres thermomètres ne présentent pas une telle augmentation de température.

Le liquide de refroidissement qui est passé au contact du combustible fondu a l’air de s’écouler là où se trouve ce thermomètre. On ne sait pas pourquoi ces eaux retenues chauffent.
Tepco affirme qu’ils sont toujours en train d’en chercher la raison.

http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_141031_08-j.pdf

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Source: Fukushima