4 years have passed already since an earthquake of magnitude 9.0 on Ritcher scale hit the Japanese East coast, damaging severely in the area around Fukushima. The 11th of March of 2011, Fukushima made all us remember something that the world pretended to have forgotten: nuclear energy is dangerous and no matter how many precautions are taken, everything can’t be predicted, and accidents finally happen. There is no excuse this time, can’t be said that the accident happened because the URSS government operate it or blame everything to thel socialist system. Instead, ironically, it happened because of a natural phenomenon and external to the nuclear plant, in a country known for its leadership in the technology sector. One hour later approximately, a tsunami hit the cost, driving the situation into a tragedy.
The slopped water contained light radionuclides such as Iodine, that emits radioactivity for a period of 160 days, and cesium, that is radiotoxic for none other than 120 years. The content of radioactive iodine in the surroundings water was sometimes above 7,5 million times superior to the legal limit and 1,1 million times above the cesium limits. The quantity of atmospheric cesium that has been transported through the ocean and the air it’s still a unknown factor but potentially bigger.
The radioactive slop to the sea constitutes a serious and unprecedented fact that introduces a new variable to this kind of accidents. The contamination will affect the marine ecosystems and it’s very difficult to evaluate its effect due to the non-existence of precedents. They are also scarce the studies that evaluate the effects of radioactivity in living beings, and in particular, in fish and algae. However, what we already know is the capacity that fishes have to mutate, therefore the marine flora and fauna will be severely affected. The extension of the contamination will depend of the distribution of the marine currents around the area but it will probably affect a hundred square kilometers. It must be beard in mind the fact that fish banks move, spreading the radioactivity to a further area, far away from the ground zero. It has also to be taken into account the effect of accumulation of contamination in the trophic chain. It has been already detected fishing species with 240 times a higher content than the legal limit. Big fishes eat not only one small fish, but plenty, and each of them containing its radioactive apportion. Which lead the individuals that are in the higher positions of the trophic chain, to accumulate the higher levels of radioactivity. And we can’t forget that at the end of this chain is the human species. A human being who is devoted to carry off everything that crosses along his way or chops on his hook. A human being that pays ridiculously high sums for a kilo of tuna or for a shark fin soup, not knowing that the only thing that they are winning by eating these animals is an extremely high dose of heavy metals, as well as contributing to the destruction of the marine ecosystem.
The 4 reactors of the Fukushimas’ II central suffered important damages and the tsunami enabled the use of both the primary circuit of refrigeration and the emergency systems. The heat of the reactor was really high due to the radioactivity of the fuel, and was essential to cool it down to avoid the fusion of the nucleus and its spread outside. The solution adopted was to spread the reactors with large amounts of sea water. During long 11 months. Tepco company, in the beginning of April of the same year started to slop voluntarily 11.5000 tons of contaminated water because of the need to shelter water from the interior of the reactors that was even more contaminated.