Vietnam sea water contaminated with radiation?

Scientists assert that the time of Vietnam's sea water is not exposed to radioactivity and marine life in the territory of Vietnam is not affected.

Associate Prof. Dr. Vuong Huu Tan, Director of Vietnam Atomic Energy Commission said, right after learning that Tokyo Electric Power Company (TEPCO) discharged 11,500 tons of light radioactive water from Fukushima nuclear power plant. I went to the Pacific Ocean, the Institute instructed to inspect the contamination of seawater in Ba Ria - Vung Tau and Ninh Thuan, but did not detect radioactivity in seawater.

Difficult to follow the sea to Vietnam

Vietnam Sea is still safe before radiation (Photo: Nhu Y)

According to calculations of the flows in the world, Prof. Dr. Dinh Van Uu, Department of Meteorology - Hydrology - Oceanography, University of Natural Sciences, Hanoi National University said, there is no water flow. East Japan flows straight towards the Vietnamese sea.

'Nothing can be said in the long run, but within a couple of months there will be no fear of being affected. The reason, the water flows to the Northeast, so it will have to flow to the United States first, then return to Vietnam, so the radioactive water flowing to Vietnam may not happen , 'he said.

GS Uu also said that due to circulation in the country is different from the air, so in the long term, the possibility of seawater contamination from Japan flowing to Vietnam is rare. Long-lived in water, radioactivity can be diffused. However, what GS Pros really worries about is that the amount of radioactivity will be contaminated with shrimp, fish and other organisms in Japan's waters.

The results of measuring seawater today in units of the Ministry of Science and Technology show that radioactivity has not been detected in sea water in Vietnam. The Da Lat Nuclear Research Institute also regularly samples seawater in Ninh Thuan but has not yet discovered radioactivity in seawater.

Dr. Nguyen Nhi Dien, Director of Da Lat Nuclear Research Institute, said: The sampling was conducted throughout the week but no radiation was detected in the sea water. Japan discharges radioactive water into the sea but at low concentrations, it is possible that radioactivity is only around 30km from the place of discharge.

No worries about radioactive fish and shrimp

Many people expressed concern about the contamination of fish, shrimp or marine creatures in Vietnam, Professor Nguyen Tac An, former Director of Nha Trang Oceanography Institute, said he did not mind this.

According to GS An, in principle, the flow to the East Sea of ​​Vietnam is still capable of transferring radioactive amounts, but with the current amount of radioactivity, if returning to Vietnam, there is nothing to worry about. For Japanese marine fish species, which are cold sea fish, they cannot enter the sea of ​​Vietnam. ' Temperatures and salinity are barriers to organisms, so if Japanese fish enter the Vietnamese sea, they will die immediately. This is also called an ecological barrier. Only a concern about fishing from the Japanese sea should be taken into consideration , 'said Professor An.

So far most CTBTO monitoring stations in the Northern Hemisphere have detected radioactive nuclei, shown in the figure.

The latest information on environmental radiation in Japan shows that the level of radiation measured off Fukushima has reached its highest level in the past 3 weeks. Specifically, at the sampling point 30 km from Fukushima I to the East, I-131 was measured at 88.5 Bq / l on 11 April, 2.2 times higher than the permissible limit for wastewater from the establishment. Nuclear.

The measured Cs-137 is also at its highest level in the past few weeks, but is still smaller than the limit allowed. At the sampling point 15 km away from the factory, I-131 is 23 times the permissible limit.

Meanwhile, radioactive measurement results in waters near the factory tend to decrease rapidly. On 11.4, the measurement results of I-131 and Cs-137 at the points near the factory are below 1.5 kBq / l, and at the measuring point about 30 m from the discharge port of Units 5 and 6, is about 7 kBq / l .