The website Manufacturing.net carried a story from the Kyodo News Agency today:
Around 1.1 tons of radioactive water overflowed Wednesday from a container during cleansing of a water treatment system at the crippled Fukushima Daiichi nuclear power complex, plant operator Tokyo Electric Power Co. said.
The water did not leak outside due to a barrier and remained inside the building housing the so-called Advanced Liquid Processing System (ALPS,) a facility that has been in trial operation since March last year.
The incident occurred as workers were flushing material that has absorbed radioactive substances into a waste container. But they noticed the container was overflowing at about 12:20 p.m.
The water contained around 3.8 million becquerels per liter of beta radiation emitting radioactive materials such as strontium-90. Workers were not contaminated with the radioactive materials, according to TEPCO.
TEPCO was cleaning the ALPS system for a good reason: It wasn’t working. According to the story:
TEPCO had to clean ALPS because it found one of the three lines was not removing radioactive substances to the level required.