Present Status of Marine Radioecology in Jakarta Bay

Operation of nuclear facilities such as research reactor and it’s supporting
installation in Serpong Nuclear Area may release controlled radionuclides to
Cisadane River and then it would flow to Jakarta Bay. There are limited marine
radioecology studies or radionuclides monitoring at Jakarta Bay. Therefore
monitoring of 239/240Pu and 137Cs was carried out from Tanjung Pasir to Tanjung
Kerawang. The ERICA Assessment Tool was used to evaluate radiological risk in
the marine environment of Jakarta Bay area. The 137Cs concentration in sea water
and sea sediments were in range of 0.17 – 1.17 Bq.m-3
and 0.34 – 1.21 Bq.kg-1
,
respectively. Moreover, result of 239/240Pu measurement showed that concentration
at sea water and sea sediment were range from < MDA – 0.53 mBq.m-3
and
2.64 – 55.70 mBq.kg-1
respectively. The results of risk analysis were indicated that
all the total dose rates per organism were millions time lower than the screening
rate (10 mGy.h-1
).