PENGARUH PARAMETER PROSES ELEKTRODEPOSISI TERHADAP PENENTUAN BERAT ISOTOP 235U DALAM PEB U3Si2/Al PASCA IRADIASI

Abstract

Electrodeposition process for determination of ²³⁵U isotope is affected by current, contact time, feed volume and type of buffer solution. The aim of this research is to obtain optimum parameter of electrodeposition process for ²³⁵U determination in U₃Si₂/Al irradiated fuel plate. Electrodeposition process is done by some variation of parameters, that are the current 1; 1.2; and 1.4 ampere with variation of time 1; 1.5; 2.0; 2.5 and 3.0 hours. The standard solution volume of 20% U₃O₈ are 100; 300; 500; 700 µL with variation of electrolyte buffer solution NH₄Cl, NH_{4OAc, NH4}HSO₄ dan (NH₄)₂SO₄. The result of electrodeposition process showed that optimum condition electrodeposition process for ²³⁵U isotope was obtained currents 1.2 ampere with process time for 2 hours, and 300 µL volume feed with electrolyte buffer NH₄HSO₄ in pH 3,5. The results of the electrodeposition process was obtained 2.314 µg deposition of the isotope ²³⁵U with recovery of 99.91%. The condition optimum parameter above was used for electrodeposition process in determination of ²³⁵U isotope which contained in U₃Si₂/Al irradiated fuel element. The spectrometer alpha analysis was obtained weight of ²³⁵U isotope as 0.403 µg with recovery of 91.80%. The conclusion of this research, the electrodeposition methods is good enough to be used for determining ²³⁵U isotope in U₃Si₂/Al irradiated fuel plate.