Desain Konseptual Reaktor Cepat Berpendingin Karbondioksida dan Berbahan Bakar Uranium Alam Dengan Daya 2400 MW

This paper presents the design concept of a carbon dioxide-cooled fast reactor.  This reactor utilize U-10%Zr as fuel and SS316 as cladding.  The strategy of modified CANDLE ( Constant Axial shape of Neutron flux, nuclide densities and power shape During Life of Energy production ) was applied for burnup in the core with power 2400 MW. The reactor core calculations were performed with a cylindrical geometry that is varied on the height and diameter of the core using a set of CITATION and PIJ modules on the SRAC ( Standard Reactor Analysis Code ) program. The ideal core size was obtained with a high of 350 cm, and a diameter of 240 cm with the resulting survey parameter are effective multiplication factor( k eff ), excess reactivity, radial and axial power distribution, and power peaking. The reactor core reaches a critical condition with k eff 1.05 and excess reactivity 5.3% and radial power peaking 1.73. Optimization was done with power flattening, that is by dividing the core into two parts with a fuel fraction of 60% for the inner part with thick of 80 cm and fuel fraction of 65% for the outer part with thick of 40 cm, the results are 1.013, 1.3% and 1.5 for k eff , excess reactivity, and radial power peaking, respectively.