부산, 경남지역 환경시료의 전베타 방사능 농도

Abstract

Gross beta radioactive concentration was detected for environmental samples in Busan and Gyeongnam. This is for the purpose of environmental inspection and to monitor the radioactive concentration exposed to radiation by nuclear generation and to evaluate the exposure dose to the resident in the area around the Gori nuclear plants. The measurements were performed by low background alpha/beta counting system. The samples were the sea water and river water corrected in Busan and Gyeongnam area from January 2012 and December 2014. The sea water was collected at 9 points and the river water at 4 points. The data are compared to those at Busan National University for the river water and at Songjung for the sea water. The radioactivity concentrations of the sea water are estimated to be in the range of 8.07~13.4 Bq/L which are similar to the annual average value ranged from 9.97 to 11.1 Bq/L, while those of river water are in the range from MDA (less than 0.00758 Bq/L) to 0.229 Bq/L which shows no deviation from the annual average values in the range of 0.0389~0.0811 Bq/L. In case of river water, it was confirmed that the gross beta radioactivity concentrations are in strongly correlated with the rainfall graph in which the concentrations are high in winter and low in summer with less and much rainfall, respectively.