Radioecologycal Study of ~(239/240)Pu In Bangka Island And Muria Peninsula: Determination of ~(239/240)Pu in Marine Sediment And Seawater As Part of Baseline Data Collecting For Sitting of Candidates of First Indonesia NPP

摘要

Radioisotope Pu-239/240 are alpha emitting nuclides important indicators of radioactive contamination of the marine environment. Global fallout is the main source of plutonium in the marine environment. There are very limited study on ~(239/240)Pu in Indonesia coastal environments. The data of this radioisotopes is needed for baseline data of nuclear power plant (NPP) site candidates both in Bangka Island and Muria Peninsula. Bottom sediments play an important role in radioecological studies of the marine environment because a large proportion of radioactive substances entering the sea is adsorbed over time onto suspended particulate matter and deposited in sediments. Plutonium is particle reactive and deposited in marine sediment. Radioisotope ~(239/240)Pu was determinated by alpha spectrometry after radiochemical procedure that was performed in both water and marine sediment from Bangka Island and Muria Peninsula. The sediment baseline of concentration ~(239/240)Pu in Bangka Island and Muria Peninsula were range from 0.013 to 0.021 Bq.kg~(-1) and 0.018 to 0.024 Bq.kg~(-1) respectively. The water baseline concentration this isotope were range from 2.73 to 4.05 mBq.m~(-3) and 2.98 to 4.50 mBq.m~(-3).