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	03rd Qtr 2011
	Report Radiation monitoring around nuclear research facilities
	The following summarizes the monitoring results of the surroundings of research reactorslocated at Institute of Nuclear Energy Research (INER) and National Tsing-Hua University(NTHU) during the third quarter in 2011. Analytic number of samples is 191. Direct radiation:With thermoluminescent dosimeter (TLD), the gamma dose rates around INER werebetween 0.054 and 0.083 μSv/h, and those around NTHU were between 0.050 and 0.063μSv/h respectively. All the data are within the variation of environmental backgroundradiation. With gamma radiation monitoring network, the gamma dose rates around INER werebetween 0.057 and 0.096 μSv/h. All the data are within the variation of environmental background radiation. Airborne particulates:Gross beta activities were between 0.14 and 0.99 mBq/m3. With gamma spectrometry, no man-made radionuclides were found. Grass and Plants:Gross beta activities were between 58 and 202 Bq/kg‧fresh. With gamma spectrometry, no man-made radionuclides were found. Water (including drinking water, underground water, lake and river water):Gross beta activities were between 18 and 338 mBq/ L. Tritium analyses were below MDA. With gamma spectrometry, no man-made radionuclides were found. Agricultural products:With gamma spectrometry, no man-made radionuclides were found in tea leaves, rice and vegetables, etc. Cumulative effect samples (including soil and sediment in the lakes of NTHU):With gamma spectrometry, the activity of Cs-137 was between MDA and 2.6 Bq/kg • dry in soil. No man-made radionuclides were found in river sand. The activity of Co-60 wasbetween MDA and 2.4 Bq/kg • dry, and the activity of Cs-137 was between MDA and 20 Bq/kg • dry in sediment from the Lotus and Kun-Ming Pond of NTHU. Based on the monitoring results of the surroundings of the National Tsing-Hua Universityand Institute of Nuclear Energy Research, the maximal personal dose of each location isassessed and found to be lower than the dose limit.