Fukushima and the Law of the Sea (Part I)
Two days ago, Japan’s nuclear regulatory agency disclosed estimates of the volume of radioactive material that has escaped from the Fukushima reactor complex since the March earthquake and tsunami. The agency estimates that the emitted volume of radioactive cesium is approximately 168 times higher than that of the atomic bomb dropped on Hiroshima at the end of WWII, and that the volumes of radioactive iodine and strontium are approximately 2.5 times higher. All are linked to cancer, and the cesium and strontium isotopes can persist in the environment for decades.
The estimates are truly alarming. Some have argued that the impact on humans will be limited because the vast majority of the material has fallen or leaked into the ocean, where it will disperse and substantially dilute. But dilution is not a great reassurance. Given the extended half-lives of some of these materials, there is reasonable concern that radiation from Fukushima will damage marine habitats for years and, in turn, harm the citizens of Japan and other proximate countries.