PENENTUAN KANDUNGAN ISOTOP 235U DALAM PEB U3Si2-Al TMU 2,96 gU/cm3 UNTUK PERHITUNGAN BURN-UP

Abstract

²³⁵U separation has been carried out in the solution of PEB U₃Si₂ - Al with loading of uranium (TMU) 2.96 gU/cm³ at the Top. Top of PEB U₃Si₂-Al cut into three sections (triplo) with code T₁, T₂ and T₃. Weight of each PEB code T₁ = 0.095 g, T₂ = 0.086 g and T₃ = 0.087 g and dissolved using HCl and HNO₃ in hotcell. The purpose of this study was to determine the content of the isotope ²³⁵U in the solution PEB U₃Si₂-Al post-irradiation and subsequently used for the calculation of burn-up. ²³⁵U isotope separation in the solution PEB U₃Si₂ - Al was conducted using an anion exchange column method using Dowex1x8 resin. Pipette solution of 100 mL, and then put into a column containing Dowex resin with a weight of 1.2 g. U effluent results in the column was eluted using 0.1 M HCl, then dried and conducted electro-deposition process and then analyzed using a spectrometer-α. The analysis showed that the content of the isotope ²³⁵U obtained at T₁ = 0.03665 g/g PEB, T₂ = 0.003468 g/g PEB and T₃ = 0.03208 g/g PEB with separation recovery of 63.71 %. The content of isotope ²³⁵U obtained is used for the calculation of burn-up. burn-up calculation results of PEB U₃Si₂-Al of Top section (T₁, T₂ and T₃) were obtained respectively by 43.31 %, 49.48 % and 45.41 % or burn-up an average of 45.75 %. This data is smaller than a data burn-up of PEB U₃Si₂-Al of middle section of 50.69 % conducted by previous researchers. However, this data can not be used as an input to the reactor, due to should be equipped with a data burn-up of PEB U₃Si₂-Al of bottom section. Therefore, in the nextstudies will be conducted calculation of burn-up PEB U₃Si₂-Al of bottom section.