Plant micro- iodine of detection of spinach - 131 in the open in Beijing-Tianjin Henan Province
It is reported (the intersection of reporter and Zheng dexterous) April 6, Ministry of Public Health coherent to report Ministry of Health inspect from Beijing, Tianjin, the intersection of Henan and area by random samples, find micro- radioactive iodine - 131 in the spinach that plant in the open April 5, the content is 1~3Bq/kg respectively. Because detect it for the trace, the situation has not influenced public health at present, do not need to take the safeguard procedures.
According to Ministry of Public Health, the vegetables radioactive pollution monitoring experience shows in the nuclear accident previously, large leaf, vegetables with small fine hair of surface growing in the open are apt to absorb the radioactive material subsiding in the air. Choose the spinach to measure to find whether the vegetables are polluted by the radioactive material earlier.
Practice has proved, can reduce the radioactive material on the surface of vegetables to wash effectively with water, and after iodine - 131 of detection in open-air spinach is just in the rainfall this time. As to this, Ministry of Public Health points out, the radioactive material in the air will subside to the ground finally. Because of the intersection of air and the intersection of medium-level radioactive substance and the intersection of density and trace very much in our country at present, the vegetables radioactive pollution caused is generally difficult by detection that it subsides. Recently, the light rain appears in areas such as Beijing,etc., the rainfall accelerated the subsiding of the air medium-level radioactive substance, and the light rain makes these materials can have been retained and has not been washed away on the surface of the spinach again, so micro- iodine - 131 of detection in spinach sample.
Find result and air find whether the result has relevance as to the radioactive nuclide of the food, Ministry of Public Health point out radioactive material in the air subside, can pollute ground and food of vegetables,etc. that grow in the open. The higher the density of the air medium-level radioactive substance is, the more radioactive materials of surface of vegetables subsiding to the ground and growing in the open are. The sleet weather can accelerate the subsiding of the air medium-level radioactive substance.
Notify according to Ministry of Public Health, after the accident of Fukushima nuclear power station of Japan happens, Ministry of Public Health disposes the Northeast and coastal area relevant organization and does food and drinking water well and monitors the preparation rapidly, China disease accuse of centre work out the intersection of training technique and scheme and find person, go on the technical training to relevant organization. March 26, the country is nuclear after meeting an urgent need to coordinate the committee to announce that detects iodine - 131 in the air, Ministry of Public Health trusts China disease to accuse of the centre in 14 provinces such as Liaoning, Hebei, Jiangsu, Zhejiang, Beijing, Shanghai, Guangdong, Shandong immediately ' Market) Have launched the food and radioactive monitoring of drinking water.
Ministry of Public Health points out, increases with the regional rainfall gradually, the pollution of radioactive nuclide will be more and more serious in the food and water, will depend on the density of the air medium-level radioactive substance. The density of the air medium-level radioactive substance depends on the quantity of the radioactive material that Fukushima nuclear power station of Japan releases in and duration again, and meteorological condition ( For instance wind direction, wind speed and atmospheric circulation,etc.) . Rainy the intersection of time and size and the intersection of rainfall and size, will influence the intersection of vegetables and radioactive level of pollution of material directly.
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