DW – March 11, 2020
The nuclear disaster at Fukushima sent an unprecedented amount of radiation into the Pacific. But, before then, atomic bomb tests and radioactive waste were contaminating the sea — the effects are still being felt today.
Almost 1.2 million liters (320,000 gallons) of radioactive water from the Fukushima nuclear power plant is to be released into the ocean. That’s on the recommendation of the government’s advisory panel some nine years after the nuclear disaster on Japan’s east coast. The contaminated water has since been used to cool the destroyed reactor blocks to prevent further nuclear meltdowns. It is currently being stored in large tanks, but those are expected to be full by 2022.
Exactly how the water should be dealt with has become highly controversial in Japan, not least because the nuclear disaster caused extreme contamination off the coast of Fukushima. At the time, radioactive water flowed “directly into the sea, in quantities we have never seen before in the marine world,” Sabine Charmasson from the French Institute for Radiological Protection and Nuclear Safety (IRSN) tells DW.
Radiation levels in the sea off Fukushima were millions of times higher than the government’s limit of 100 becquerels. And still today, radioactive substances can be detected off the coast of Japan and in other parts of the Pacific. They’ve even been measured in very small quantities off the US west coast in concentrations “well below the harmful levels set by the World Health Organization,” according to Vincent Rossi, an oceanographer at France’s Mediterranean Institute of Oceanography (MIO).
But that doesn’t mean there’s no risk, says Horst Hamm of the Nuclear Free Future Foundation. “A single becquerel that gets into our body is enough to damage a cell that will eventually become a cancer cell,” he says.
A study from the European Parliament reached a similar conclusion. The research found that “even the smallest possible dose, a photon passing through a cell nucleus, carries a cancer risk. Although this risk is extremely small, it is still a risk.”
And that risk is growing. Radioactive pollution in the ocean has been increasing globally — and not just since the disaster at Fukushima.