The United States supports the decision of Japan's Fukushima sewage to enter the sea. Is the nuclear sewage in Fukushima really harmless?

The United States supports Japan's decision to discharge sewage from Fukushima into the sea. The nuclear sewage from Fukushima is harmful. On March 11th, 211, a major earthquake occurred in Japan and caused a huge tsunami. At that time, radiation leakage occurred at the Fukushima Daiichi nuclear power plant operated by Tokyo Electric Power Company, and four nuclear reactors were damaged to varying degrees. But at this time, the core still has huge decay heat, and it needs water injection to cool down, so nuclear wastewater is produced. Although the Fukushima nuclear power plant has been treating the related nuclear sewage, it is difficult to remove radioactive substances from the nuclear sewage due to technical factors? Tritium? , resulting in increasing nuclear sewage. At present, all nuclear sewage is stored in the storage tanks of nuclear power plants. As of April, the nuclear sewage in the storage tank has reached 1.25 million tons. At present, Fukushima produces about 14 tons of nuclear sewage every day. It is estimated that by 223, these nuclear sewage will reach the limit of 1.37 million tons of water tank capacity. Now the Japanese government has to take measures. They have discussed five schemes, namely, discharging into the sea, turning into steam and discharging into the atmosphere, discharging into the deep underground along underground pipelines, electrolyzing, and burying it in the ground in a solid state. However, these schemes are time-consuming, laborious and costly, and the simplest way is to discharge them into the sea, so the Japanese government decided to discharge the Fukushima nuclear sewage into the sea. However, it is impossible to make nuclear wastewater completely harmless. With the current science and technology, it is almost impossible to completely remove radioactive isotopes from nuclear wastewater. Moreover, the concentration of tritium reached the standard through dilution does not mean that the radioactive pollution of nuclear wastewater has been completely eliminated. Nuclear waste contains many radioactive isotopes. Some short-lived atomic isotopes may disappear within ten years after the accident, but the decay process of some atomic isotopes may take tens of thousands or even hundreds of thousands of years to disappear. Even if the radioactive risk of tritium itself is small, the radiation it produces can be ignored, but tritium in nuclear waste water can eventually reach human body through food chain, respiratory tract and skin, and some of it can be transformed into organically bound tritium through physical, chemical and biological actions. These radioactive substances are destructive to human DNA, and some substances can penetrate into human lung, kidney, bone and other cell tissues, destroying cell genes and causing cancer, which is very dangerous.