Small amounts of different radionuclides remain in the water (although they are well below regulatory limits) even after treatment, and tritium is not removed by the ALPS system at all.
還可以看看這個....
*Carbon-14 also cannot be removed through purification process, but Carbon-14 contained in the water stored in tanks is far below the level of national regulatory standards (at the most 1/10 th of the standard). After dilution, the level of Carbon-14 will go down to at the most 1/1000th of the standards.
https://www.meti.go.jp/english/earthquake/nuclear/decommissioning/pdf/202104_bp_breifing.pdf
