But the other radioactive substances remain.
Water stored in the tanks is contaminated with a host of radioactive substances.
"There is no confirmation that anyone's health has been directly affected by radioactive substances.
The test cavities still contain fission products and various radioactive substances.
"But now it would be reasonable to assume that radioactive substances are settling on the seafloor".
These are organic chemicals, inorganic chemicals, turbidity, microorganisms, and radioactive substances.
"Radioactive substances are entering people's bodies from the air, from the food.
Radioactive substances could enter the ocean for some time, perhaps even years".
Radioactive substances emit three kinds of rays known as α-, β- and γ-rays.
In principle, the technology can strip all radioactive substances from the water, except tritium, one of the less dangerous radioactive substances, which was spread widely through the environment by nuclear bomb tests in the 1950s and 1960s.
Dr. Raskin conducted early tests of ways to exploit this mechanism to sop up radioactive substances and heavy metals.
