 | The following summarizes the monitoring results of radioactivity in fallout, foodstuffs, and cumulative samples during the first half in 2011. Analyses number of samples is 682. |
| In response to the nuclear accident occurred in Fukushima nuclear power plant in Japan on March 12, 2011, RMC, FDA, NTA and FA fully sampled the imported foods, agricultural and fishing products, wines and fishes from Japan and sent to RMC for radiation detection. Analyses number of samples is 1233. The followings are the detection results of the environmental samples in Taiwan, imported foods, wines and fishes from Japan. |
| Direct radiation: The gamma dose rates were between 0.036 and 0.077 μSv/h. All the data are within the variation of environmental background radiation. |
| Airborne particulates: Gross beta activities were between 0.14 and 1.38 mBq/m3, which were far below the warning level of 9×103 mBq/m3. The activity of I-131 was between MDA and 0.002 mBq/m3. The activity of Cs-134 was between MDA and 0.12 mBq/m3. The activity of Cs-137 was between MDA and 0.11 mBq/m3. |
| Water tray samples: Gross beta activities were between 0.22 and 10.58 Bq/m2 • month, which were far below the warning level of 9×104 Bq/m2 • month. The activity of Sr-90 was below MDA. With gamma spectrometry, no man-made radionuclides were found. |
| Rainwater and fallout (collected via water tray): Gross beta activities were between MDA and 822 mBq/L. Tritium analyses were between MDA and 7.2 Bq/L. With gamma spectrometry, no man-made radionuclides were found. |
| Grass: Gross beta activities were between 129 and 189 Bq/ kg • fresh. The activity of Cs-137 was between MDA and 0.7 Bq/kg • fresh. |
| Water sample: Gross beta activities were between MDA and 117 mBq/L. Tritium analyses were below MDA. The activity of Sr-90 was below MDA. The activity of Cs-137 was below MDA. |
| Tealeaves sample: Gross beta activities were between 158 and 179 Bq/ kg • fresh. With gamma spectrometry, no man-made radionuclides were found in Ping-Lin’s and Nan-Tou’s samples. The activity of Sr-90 was between MDA and 0.31 Bq/kg • fresh. |
| Soil and river sands: Gross beta activities were between 444 and 828 Bq/kg • dry in soil. The activity of Cs-137 was between MDA and 8.2 Bq/kg • dry in soil. The activity of Sr-90 was between 0.6 and 1.1 Bq/kg • dry in soil. With gamma spectrometry, no man-made radionuclides were found in river sands. |
| Foodstuffs: Gross beta activities were between 18 and 125 Bq/kg• fresh in the public diet. The activity of Cs-137 was between MDA and 0.3 Bq/kg • fresh in the public diet. I-131 was not found in milk. Gross beta activities were between 5 and 114 Bq/kg• fresh in sea fishes and sea weeds. The activity of Cs-137 was between MDA and 0.2 Bq/kg • fresh in sea fishes and sea weeds. |
| Tap-water: Gross alpha activities were below MDA. Gross beta activities were between MDA and 89 mBq/L. All the data are met the safety requirement for drinking water. |
| Mineral water: Gross alpha activities were below MDA. Gross beta activities were between MDA and 42 mBq/L. All the data are met the safety requirement for drinking water. |
| The imported foodstuffs: The imported foodstuffs include seafood can, fresh vegetable, fresh fruit, dry fruit and dry seed, etc. The activity of Cs-137 was between MDA and 1.9 Bq/kg. All the data are met the safety requirement for foodstuffs. |
| Tile: With gamma spectrometry, no man-made radionuclides were found in selected samples. All the data are lower than reference level for building material. |
| The online foodstuffs: With gamma spectrometry, no man-made radionuclides were found in selected samples. All the data are met the safety requirement for foodstuffs. |
| Imported foods from Japan: During the nuclear accident of Fukushima nuclear power plant, all the data of the imported foods, agricultural and fishing products, and wines from Japan are met the safety requirement for foodstuffs. |
| Fish: During the nuclear accident of Fukushima nuclear power plant, all the data of the fishes sampled and sent by FA are met the safety requirement for foodstuffs. |
| Based on this biannual survey, we conclude that the artificial radioactivities in Taiwan are within the variation of environmental background radiation. It is accessed that between January and June 2011, the committed effective dose due to inhalation, drinking water and food consumption is lower than the dose limit. |
| During the nuclear accident of Fukushima nuclear power plant, all the data of the imported foods, agricultural and fishing products, wines, and fishes from Japan are met the safety requirement for foodstuffs. |
