First, there is no effective treatment technology for many radionuclides in nuclear polluted water.

There are more than 60 kinds of radionuclides in Fukushima nuclear polluted water, such as tritium, carbon-14, iodine-129, etc. Many of them have no effective treatment technology, but Japan has always misled that "the problem is only tritium."

In 2020, the international environmental protection organization pointed out in the investigation report entitled "Fukushima Daiichi nuclear power plant polluted water crisis" that there was a high concentration of radioactive carbon-14 in the nuclear polluted water, and the removal of carbon-14 was not considered at the beginning of ALPS design. Sean Bernie, the author of the report and a German researcher, pointed out that TEPCO didn't admit the existence of carbon-14 in the so-called "treated water" until 2020.

According to the investigation of international environmental protection organizations, ALPS can not remove radioactive tritium and carbon-14, nor can it completely remove other radioactive isotopes, such as strontium -90, iodine-129 and cobalt -60.

Second, the nuclear pollution of radionuclides in water affects human health.

Japan claims that after the seawater is diluted, the concentration of tritium in the water will reach less than one fortieth of the Japanese control standard. However, dilution can not reduce the total radioactive dose of discharged nuclear polluted water.

Mao Liang, a professor at the School of Environment of Nanjing University, gave an example. "Nuclear radiation exposure is divided into internal exposure and external exposure. Tritium releases beta rays, and tritium water is discharged into the ocean. Algae will use tritiated water to synthesize organic matter in protein. Algae is the food of shrimp and fish, which will be eaten by fish and shrimp and become protein in fish and shrimp.

So in the process of eating fish and shrimp, tritium in protein may be introduced into the body and become a part of the body, leading to long-term irradiation, which will inevitably affect health. "

Gao Zhiguo, president of China Law Society and former judge of the International Tribunal for the Law of the Sea, said that tritium may not be the most dangerous after these radionuclides enter the marine environment and ecology. Carbon-14 and iodine-129 are the most harmful to human beings and marine life, with a half-life of over 5000 years and iodine-129. Carbon-14 will accumulate in marine organisms, that is, fish, and the abundance or concentration of carbon-14 may be 50 times that of tritium.

Third, the influence of nuclear polluted water involves the whole world.

The German Institute of Marine Science pointed out that the Fukushima coast has the strongest ocean current in the world. Within 57 days from the date of discharge, radioactive materials will spread to most parts of the Pacific Ocean. Three years later, the United States and Canada on the other side of the Pacific will be affected by nuclear pollution, and it will spread to the global waters after 10.