CARBON DUST IN PRIMARY COOLANT OF RDE: ITS PROBLEM AND SOLUTION
DOI:
https://doi.org/10.17146/tdm.2018.20.2.4456Keywords:
Carbon dust problem, primary coolant, particle size distribution, RDEAbstract
There are two kinds of impurities in primary coolant of Reaktor Daya Eksperimental (RDE) i.e. gaseous and particulate impurities. Carbon dust as a particulate impurity is generated from abrasion of pebble friction in the core and friction between pebble and refueling pipelines. Due to negative impact to the system, structure and component (SCC), therefore carbon dust must be removed from primary coolant. This paper discusses the carbon dust removal in RDE. The objected of the research is to analyze the helium purification system (HPS) capability of removing carbon dust through particle size distribution analysis. The carbon dust size particle varies from 0.1 µm up to 10 µm regarding to the experiences of high temperature gas cooled reactor (HTGR) operation. Three models have been made by using ChemCAD. First model was using single filter, second model was using 2 filters in series and the last one was using both double filters in series and cyclone. The dust removal total efficiency of first model is 88.70 %, the second model is 98.10% and the last one is 98.89%. The highest efficiency of 98.98 % was achieved in the model that used both double filters and cyclone. The cyclone should be installed in HPS of RDE if there are coarse carbon dust particle, which was found in the primary coolant to increase its dust removal capability.
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