More than seven years have passed since the Fukushima accident. The Japanese government and Tokyo Electric Power Company plan to complete the abandonment of the Fukushima Daiichi nuclear power plant for up to 40 years. However, due to technical difficulties, the abandonment of the nuclear power plant is still difficult. Recently, a Kyodo News Agency report entitled "Exclusive: Fukushima Nuclear Power Station contains tritium water detected other radioactive substances" once again aroused concern among the Japanese people, people can not help but ask: "When will the Fukushima nightmare come to an end?"
It is reported that a working group set up by the Japanese government has recently worked out five schemes for treating radioactive wastewater, such as discharging it into the ocean, into the atmosphere and into the stratum. Fukushima fishermen are worried that the practice of discharging into the sea will once again devastate local agriculture and fisheries, and therefore strongly oppose the disposal of discharging into the sea. At the end of August, the Japanese government planned to hold a public hearing on how to deal with contaminated water containing tritium.
5 sewage treatment plans to be determined
According to Kyodo News Agency reports, Tokyo Electric Power Company Fukushima Daiichi nuclear power plant purified sewage contains not only radioactive tritium, other radioactive substances also exceed or will meet safety standards. Tokyo Electric Power Company said that in 2017 after the "multi-nuclide purification equipment" treatment of nuclear power plant effluent determination results showed that the half-life of about 15.7 million years of iodine 129 radioactivity per litre maximum 62.2 Becquerel (international unit of radioactivity), significantly exceeding the statutory standard value of 9 Becquerel. In addition, the maximum radioactivity of Ru106 with a half-life of about 370 days was 92.5 Becquerel (standard 100 Becquerel).
Some voices pointed out that because the Tokyo Electric Power Company initially used "multi-nuclide purification equipment" to treat nuclear contaminated water, due to the unstable purification performance of the machine, then the activity of various radioactive elements will be higher, Tokyo Electric Power Company said that "no detailed statistics".
In addition, Tokyo Electric Power Company (TEPCO) said it was "not investigating" the activity of some 920,000 tons of tritium-containing wastewater stored in 680 tanks as of August at the Fukushima Daiichi nuclear power plant.
At present, sewage containing large amounts of radioactive material is increasing because of the pollution caused by sewage flowing into the underground of the nuclear reactor and the need for the Tokyo Electric Power Company to continuously inject water into the nuclear reactor containers to cool the melted nuclear fuel. The storage tanks used to store the treated polluted water in the Fukushima Daiichi Nuclear Power Station are also increasing. How to deal with these "purified" tritium-containing wastewater has become a difficult problem.
Recently, a working group set up by the Japanese government has worked out five plans for treating wastewater containing excessive radioactive substances, such as discharging into the sea, into the atmosphere and into the stratum. Japan's Atomic Energy Regulatory Commission chairman, Toyoshi Okada, believes that the most realistic option is to discharge into the sea, requiring Tokyo Electric Power Company to implement as soon as possible.https://www.khnwatertreatment.com/