Sure enough, Japan's nuclear radiation fish came online again, and two days ago, the "Koh's flat carp" blackfish with excessive radiation was detected off the coast of Fukushima.
I know that many people have always been suspicious of Japanese fishery products and do not know when to eat them.
In fact, since the fukushima nuclear accident in 2011, Japan has restricted the shipment and sale of up to 44 species of fish, and by December 2019, the restrictions have been lifted, and the last species of ray remains until February 25, 2020.
On what basis is it determined whether these fish can be marketed?
The detection value of radioactive cesium is lower than the standard, and the shipment standard stipulated by the Japanese government is less than 100 becquerels per 1 kilogram of fish. That is, no fish detected with radioactive cesium above 100 becquerels were not included in the restricted marketing range.
According to the regulations of the Fukushima Prefectural Fishing Federation, the standard for the content of radioactive substances in fish is 50 becquerels, if you look at it according to this standard, the "Koh's flat carp" blackfish caught this time actually exceeds the standard by 10 times.
The "Koh's Flat Carp" blackfish, which was found to have exceeded the radioactive material standard, was caught on the 22nd in a fishing ground about 8.8 kilometers from the coast of Shinji-cho, Fukushima Prefecture, with a water depth of 24 meters, and its radioactive cesium content reached 500 becquerel per kilogram.
What is the concept of 500 Becquerel?
In fact, this value is not very high, when the Fukushima nuclear accident did not occur at the earliest, the provisional standard value of radiation stipulated in Japan's food hygiene regulations was 500 becquerels per kilogram, which means that the radioactive fish detected this time were not exceeded if they were placed before 2011.
In 2012, after the Fukushima accident, the Japanese government decided to significantly tighten safety standards for radioactive cesium in food, in which the safety line for ordinary foods such as vegetables and rice would be lowered to one-fifth of the current tentative benchmark to 100 becquerels per kilogram. Japan's Ministry of Health, Labor and Welfare decided to revise the radiation testing guidelines to require local governments to strengthen testing efforts, including seafood, and the Fukushima Prefectural Fisheries Association lowered the standard to 50 behkrels.
In 2013, 740,000 becquerels per kilogram of radioactive fish were detected from the harbor of the Fukushima Daiichi Nuclear Power Plant, which is equivalent to 7,400 times the general food standard value (100 becquerels per kilogram) set by the Japanese government.
The Otaki Roku-ryū was caught on February 21 near the water intakes of Units 1 to 4 of the Fukushima Daiichi Nuclear Power Plant, with a total length of 38 centimeters and a weight of 564 grams, and was discovered by the Tokyo Electric Power Company during fishing for the destruction of fish in the harbor. Consuming 1 kg of this fish, the amount of internal radiation exposed is about 11 mSv, which is equivalent to 11 to 22 X-rays of chest fluoroscopy.
TEPCO has set up fishing nets about 2 meters high on the seabed (about 10 meters deep) at the entrance of the harbor to prevent fish living near the seabed where contaminated mud accumulates to swim outside the harbor.
Therefore, in the bay near the Fukushima nuclear power plant, the amount of radiation from radioactive waste is very large, most of the radioactive elements are deposited here, and the blackfish is precisely the bottom fish, often lurking under the water and the dense water grass. It is a carnivorous and ferocious fish, feeding on fish, shrimp, etc., according to the logic of large fish eating small fish, small fish eating shrimp, and eventually radioactive cesium accumulates in the body of blackfish.
So, you can doubt whether the blackfish detected this time escaped from the harbor entrance of the Fukushima nuclear power plant. The Fukushima Prefectural Fisheries marine research center is investigating the reasons for the out-of-flight and detection of radioactive material exceeding the standard.
"Considering the low level of radioactivity in the sea and seabed of Shinchi-cho (a town near the sea in Fukushima Prefecture), I would like to say from the bottom of my heart that the reason for detecting such a high value of radioactive cesium is unknown, and we will investigate the reason for the possibility of fish species entering and leaving the harbor of the Fukushima Daiichi Nuclear Power Plant, according to Yukichi Town, Fukushima Prefecture. ”
In other words, the sea where this fish was caught is not highly radioactive, about 8.8 kilometers from the coast of Shinji-cho in Fukushima Prefecture, the water depth is about 24 meters, and it is still a special fishing ground, so the probability of catching this blackfish that exceeds the radioactive standard is very small, unless it is swimming from other seas.
Fish with excessive radioactivity can only swim out of the sea from the harbor of the Fukushima nuclear power plant, which discharges nuclear wastewater, rather than from the depths of the ocean to the nearshore.
According to Japan's NHK report, although Tokyo Electric Power Company has set up fishing nets in the waters near the Fukushima Daiichi nuclear power plant to prevent fish from swimming out, the prefecture's Fisheries marine research center said that fish in the polluted waters near the Fukushima Daiichi nuclear power plant may have swam out of the relevant area for some reason.
Although it is not known how the blackfish entered and exited the harbor of the nuclear power plant, the possibility of the fish's activities in the relevant waters cannot be ruled out. This means that if the fish continues to be consumed, it is possible that the radioactivity will be detected, so the Fukushima Prefectural Fisheries Cooperative Association has suspended the sale of this fish.
In view of the continuous earthquakes just outside Fukushima just a few days ago, which caused minor leaks at both the Fukushima Daiichi and Fukushima Nuclear Power Plants, two hours after the 7.3 magnitude earthquake on February 13, the Japan Atomic Energy Regulatory Commission issued a message: The Fukushima Nuclear Power Plant not only had an abnormality, but also leaked water. However, it is also emphasized that the amount of water spilled is very small, the amount of radiation is very low, and there is no safety problem.
However, the Japanese people are skeptical of the government and TEPCO's claims. Public opinion in Fukushima Prefecture, Japan, said: "The Japanese government is lying and cannot come up with countermeasures, which is worrying."
This explains how blackfish with excessive radiation escape from the fishing nets in the harbor.
Perhaps it was the tsunami brought about by the earthquake that wrapped up the blackfish at the bottom of the Harbor of the Fukushima Nuclear Power Plant and the leaked nuclear wastewater and threw them out of the harbor, so the blackfish fled to the distant offshore fishery in the dark wind at night.
The Japanese government is still considering discharging nuclear wastewater into the sea, and in view of this situation, I am afraid that this option will need to be considered again.