日本核污水要排多少年

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Answer 1

日本的核污染水排放到海洋中至少需要持续三十年的时间。每天，核污水的量会增加大约 ninety tons。在福岛隐念第一核电站的用地内，有一 thousand forty-six storage tanks（大约 storing 1.37 million tons）已经填满了 ninety-eight percent 的容量。预计 by next year's February to June, these tanks will be at full capacity, and it will be difficult to add more storage tanks. The radioactivity concentration in each storage tank varies. It will take approximately two months to temporarily transfer the nuclear wastewater from multiple storage tanks to another tank, mix it thoroughly, and then confirm that the radioactivity level meets the standard for discharge. This involves the use of the multi-nuclide removal system ALPS to remove radioactive materials except for tritium.
Only when the concentration of tritium in the wastewater is diluted to a level lower than one-fortieth of Japan's standard value (1500 becquerels per liter) can it be discharged into the sea, about one kilometer from the shore. There are three main methods for dealing with nuclear wastewater, briefly described as follows:
1. Concentration and Mass Dilution: This method involves concentrating the radioactive substances in the nuclear wastewater to reduce the volume of discharge, followed by mixing the concentrated wastewater with a large volume of seawater for mass dilution. The advantage of this method is the reduced volume and concentration of discharge, which minimizes the direct impact on the environment.
2. Land-based Storage and Treatment: This method involves storing the nuclear wastewater in land-based facilities and using various physical, chemical, and biological treatment processes to remove or reduce radioactive substances in the wastewater to safe levels before discharge. This approach allows for more thorough treatment of radioactive materials in the wastewater.
3. Marine Sedimentation Sequestration: This method involves injecting the nuclear wastewater into the deepsea sedimentary layers, where the layers' adsorption and absorption properties aim to permanently sequester the radioactive materials underground.