Multiple nuclide removing system stopped for abnormality again

The multiple nuclide removing system (ALPS) had a trouble and was stopped on 9/27/2013, but it was stopped again on 10/4/2013.

(cf, [ALPS stopped] Tepco “A rubber pad for ladder was stuck in the drain of a tank” [URL])


Because the adsorption tower was stuck, they had the backwash of the filter. However, the drainage was transferred to a wrong tank, the abnormality alarm went off.

Tepco hasn’t experienced having the filter stuck. They didn’t announce what may have caused it stuck.

From their report, the operator manually chose the wrong tank, and also the system let it chosen. This can be both of the mis-operation and the system flaw.



You can ignore the truth but the truth won’t ignore you.


Français :

Le système de filtrage multi-nucléides encore à l’arrêt sur anomalie


Le système de filtrage multi-nucléides (ALPS) a eu un problème et a été arrêté le 27 septembre 2013 et il a encore été arrêté le 4 octobre 2013. (cf. [ALPS à l’arrêt] Tepco : “Un patin en caoutchouc de l’échelle s’était collé sur l’évacuation d’un réservoir”)

Il y avait des remous au filtre parce que la tour d’absorption était bloquée. L’évacuation a été branchée sur une mauvaise cuve, l’alarme s’en est déclenchée.
Tepco n’avait pas encore eu le filtre bloqué. Ils n’ont pas tenté d’expliquer pourquoi ça c’est bloqué.
Selon leur rapport, un opérateur manuel s’est trompé de cuve et le système le laissait libre de choisir. Ce peut être à la fois une erreur opératoire et une erreur de conception.

Vous pouvez ignorer la vérité mais la vérité ne vous ignorera pas.

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.


October 2013