PEMISAHAN DAN ANALISIS 137Cs DARI LARUTAN PELAT ELEMEN BAKAR U-7%Mo/Al

Abstract

The aim of this research is to get a valid method of separating cesium from U-7Mo/Al fuel plate solution through determination of parameter of method (accuracy, precision, and recovery). Precipitation method and cation exchange method that are used refer to standard ASTM 690-000 and research result of U₃Si₂/Al. Parameter method determination has been done by using 150 μL sample (U-7%Mo/Al fuel plate solution, 50 μL of standard solution in 2 mL of HCl 0,1 N. The sample solution was undergone precipitation process by using HClO₄ concentrated and 225 mg of CsNO₃ as carrier in temperature 0^oC for an hour, while exchange cation process was done by using 400 mg of resin zeolite Lampung. The analysis of ¹³⁷Cs in CsClO₄ and ¹³⁷Cs - zeolite was done by gamma spectrometer. Determination of recovery method was done by comparing count value of ¹³⁷Cs before and after separation process. Recovery of precipitation method was obtained 95.56 % with accuracy and precision measurement of 0.375 % and 1.875 % respectively, while recovery of cation exchange method obtained 26.73 %. To sum up, the results show that precipitation method better than exchange cation method for separation ¹³⁷Cs from U-7Mo/Al fuel plate solution.