nhk's taku kunier attackels the challenges they face. >> some of the programs with alps results fromnctions. others happened because of human error. about 3,000 people work at the plant every day and some contractors. they don't have good enough communication with tepco staff. this poor communication results in mistakes. managers need to fix it urgently. >> right now workers are testing the system and they say they hope to put it into full operation next year. they originally planned to staff full operations last month so they're already behind schedule. the government is helping tepco install a more sophisticated system. once that is complete, the systems together will be able to treat 1,500 tons of water every day. >> tritium is similar to hydrogen in terms of its properties. it moves easily with water. so if we get it inside our bodies we generally experience fluids, but there is no technology for taking it it oou water. the government allows higher releases of tri, tium. water containing tritium can be released without harming then viern am as long as the the substance is diluted