Kajian prakiraan dampak dispersi atmosferik zat radioaktif terkait pengaruh tinggi lepasan efektif dan jumlah sumber studi kasus calon tapak PLTN di Provinsi Bangka Belitung = Assessment on atmospheric dispersion impact of radioactive material related to effect of effective release height and number of discharge sources case study candidate sites for NPP in Bangka Belitung Province / Arif Yuniarto