PEMISAHAN CESIUM DALAM BAHAN BAKAR U3Si2/Al DENSITAS 4,8 gU/cm3 BURN UP 60% POTONGAN BOTTOM

Abstract

The separation of cesium in U₃Si₂/Al fuel with a density of 4.8 gU/cm³ and 60% burn up by cation exchange using zeolite from Lampung has been carried out. Cesium isotope is used as a burn-up indicator for irradiated nuclear fuel. The separation aims to obtain an accurate cesium weight so that the calculation of burn up by the destructive method can be carried out correctly. The fuel plate of U₃Si₂/Al was cut in duplicates at the bottom with a weight of B-1=0.036 g and B-2= 0.037g, respectively. The fuel plate of U₃Si₂/Al with this weight was then dissolved using 6N HCl and 6N HNO₃ in 10 mL. The solution of U₃Si₂/Al was then pipetted 1 mL and transferred from the hot cell to R.135 and diluted to 25 mL. The solution was pipetted 50 µL into a vial in duplicates and 1000 mg of Lampung zeolite was added. Separation process of ¹³⁴Cs and ¹³⁷Cs from ²³⁵U was done by cation exchange for 60 minutes. The results obtained were isotopes ¹³⁴Cs and ¹³⁷Cs in the solid phase while uranium (²³⁸U, ²³⁵U, ²³⁴U) and other isotopes in the liquid phase. The weight of the isotopes of ¹³⁴Cs and ¹³⁷Cs was then measured using a spectrometer/g. The weight of the isotopes of ¹³⁷Cs and ¹³⁴Cs in solution at Bottom position was B-1=0.00003283 g/0.036g and B-1= 0.000000147 g/0.036 g for ¹³⁷Cs and ¹³⁴Cs respectively while another duplicate was B-2=0.00003290 g/0.037g for ¹³⁷Cs and B-2=0.000000222 g/0.037g for ¹³⁴Cs. It can be concluded that in the separation of cesium in 50 µL solution of U₃Si₂/Al at Bottom position by cation exchange using 1000 mg of zeolite from Lampung, good results were obtained.