Radioactive Materials Monitoring on Superficial Layer Soils in Gyeongsangnam-Do

In this paper, for the purpose of investigating the effects of artificial radioactive materials between 2012 and 2013 year, analysis on 80 superficial layer soils in total collected in industrial estates, farmlands, mining areas located in Gyeongsangnam-Do were conducted by using HPGe(High Purification Germanuim Gamma-ray Spectrometer). Before investigation, the calibrations on the HPGe detector were conducted twice a year with a view to confirming the normal operation of measuring equipment. And, based on the calibration results, the effects of artificial radioactive materials were analyzed. Also, to ensure reliability on analysis results, a comparative analysis was conducted using the analysis results presented by KINS(Korea Institute of Nuclear Safety), and using the MDA(Minimum Detectable Activity) values specified by related regulations. In this investigation, ¹³¹I, ¹³⁴Cs, ¹³⁷Cs, and so on, were selected as examination nuclides. By analyzing results on total 80 superficial layer soils, because all of nuclides satisfied the MDA requirements specified in the Nuclear Safety Committee Notification No. 2012-5, it is judged that there is no problem related with the reliability of the analyzed results. Also, ¹³⁴Cs was detected infinitesimally only in the industrial complex soil sample of Tongyeong region. Therefore, it is judged that continuously monitoring on the soil samples of Gyeongsangnam-Do is required from now on