STUDI ANALISA DAN POLA PERSEBARAN RADIOAKTIVITAS PERAIRAN DAN SEDIMEN (STUDI KASUS: SUNGAI CODE YOGYAKARTA)

Abstract

The around area in the river of Code Yogyakarta represent area which have the potency to yield waste in the form of radioactive waste which can enable the happening of radioactive contamination. This research done as a mean to identify radionuclide which implied in water and sediment samples in the river of Code Yogyakarta, knowing data of concentration (activity of average) of radionuclide which identified to transmit betha () and gamma () radiation in territorial water of river Code Yogyakarta and their distribution pattern with estimate of source, and also comparing concentration (activity of average) of radionuclide transmitting betha () and gamma () radiation that implied in water and sediment of river Code Yogyakarta with permanently quality of PPRI No. 82/2001 and SK Gubernur DIY No. 214/KPTS/1991 . The sampel used by river water and sediment which is there in eleven (11) station of river Code, Yogyakarta. This water and sediment samples taken at dry season (August 2005). The result of this research got the activity of average of radionuclide transmitting betha () radiation at water sample is still below/under value float according to PPRI No. 82/2001 and SK Gubernur DIY No. 214/KPTS/1991 ( equal to 1 Bq/L). Others, element of radionuclide which have been identified at this research represent group of nature radionuclide ( 210Pb, 226Ra, 212Pb, 214Pb, 208Tl, 214Bi, 228Ac, and 40K). Inferential thereby that the environmental quality condition of river Code Yogyakarta from radioekology aspect is still be good. Keywords : radioactivity, distribution, betha (), gamma (), radionuclide, river Code Yogyakarta