Simulation of Radionuclide Dispersion Model in Water Body around Serpong Nuclear Area
Ambar Winansi (a), Setyo Sarwanto Moersidik (a*), Mochamad Adhiraga Pratama (a)
a) Environmental Engineering Study Program, Civil Engineering Department, University of Indonesia, Depok – Indonesia
* Corresponding author: ssarwamto[at]eng.ui.ac.id
Abstract
Under normal operating conditions nuclear facilities have potential release of radioactive substances into water bodies. Radionuclide release to the environment is very complex that it needs to be simplified with a mathematical model approach using Surface Water Modeling Systems (SMS 10.1) that resolves hydrodynamic differential equations by finite element method. In river, pollutant dispersion is strongly influenced by the process of advection and diffusion, where the advection process becomes more dominant. The goal of this research is to model the dispersion of 60Co radionuclides in Cisalak River located around Serpong Nuclear Area. In this research, the simulation is done by the hydrodynamic model simulation using Resources Management Associates (RMA2) module to model the flow and continued using RMA4 to model the dispersion of pollutants. In addition, this research uses discharge values variations for the dry and rainy seasons. The 60Co concentration at the release source is the highest, lowest, and average value in the last three years. The results shown that the dispersion pattern of 60Co concentration along Cisalak River is a function of distance and time. In addition, the concentration of pollutants is strongly influenced by river characteristics and also discharge of the river and effluent.
Keywords: 60Co radionuclide, dispersion model, Serpong Nuclear Area
Topic: Environmental Engineering