Multiple nuclide removing system ALPS possibly leaks in the test operation

In order to control the increasing contaminated water, Tepco is trying to install the multiple nuclide removing system ALPS (Advanced Liquid Processing System).

On 6/15/2013, Tepco found the possible leakage from ALPS. The system was still in the test operation. Tepco was planning to discharge the contaminated water after processed by APLS with the approval of Fukushima Prefectual Federation of Fishries Co-operative Associations.

At 23:00 (JST), Tepco employee found brown drops on the pan to stock the possible leaking water. They also found the discolored part on the weld line of the tank.

They measured 7,900 CPM on the discolored part of the weld line and also 4,300 CPM on the brown drops of the pan.

Because it was 700 CPM on not-discolored part of the weld line and 1,300 CPM on the rest part of the pan, they assume the concentrated salt water is directly leaking from ALPS.

Tepco started the stopping process of this leaking part at 18:17 of 6/16/2013 but it takes 6 hours to completely stop the system.


Related article..Radiation level jumped over 7 times much around multiple nuclide removing system 6 weeks after test operation [URL]



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Français :

Le système de filtrage multi-nucléide ALPS a sans doute fuit pendant les opérations de test


Pour limiter la quantité d’eaux radioactives en augmentation, Tepco essaye de mettre en place le système de filtrage multi-nucléides ALPS (Advanced Liquid Processing System).

Le 15 juin 2013, Tepco a découvert une possible fuite dans ALPS. Le système était toujours en opération de test. Tepco prévoyait de déverser en mer les eaux radioactives filtrées par le système ALPS avec l’approbation de la Fédération des coopératives de pêche de la préfecture de Fukushima.
A 23:00 (JST), un salarié de Tepco a découvert des gouttes brunes dans la cuvette de réception de l’eau des fuites possibles. Ils ont aussi remarqué une trace décolorée sur la ligne de soudure de la citerne.
Ils ont relevé 7 900 CPM (coups par minute) sur cette zone décolorée et également 4 300 CPM pour les gouttes tombées dans la cuvette.
Ils pensent que l’eau salée fuit directement de ALPS parce qu’ils ont eu 700 CPM sur les parties non décolorées et de la ligne de soudure et 1 300 CPM dans le reste de la cuvette.
Tepco a commencé le 16 juin 2013 à 18:17 la réparation de cette fuite mais il faut 6 heures pour arrêter complètement le système.

Article lié : Le niveau de la radioactivité a été multiplié par 7 autour du système de filtration multi-nucléide 6 semaines après les opérations de test

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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.


June 2013