PROSES EKSTRAKSI-STRIPPING UO2(NO3)2 BERIMPURITAS HASIL PELARUTAN DARI YELLOW CAKE

Abstract

Uranyl nitrate/UO₂(NO₃)₂ is a basic material/bait that is used as fuel both a research reactor fuel and power reactors. The process of extraction-stripping necessary to UO₂ (NO₃)₂, because in the UO₂(NO₃)₂ is still contained impurities are entrained during the dissolution process yellow cake. To obtain a solution of UO₂ (NO₃)₂ which meets the requirements of pure nuclear (nuclear grade), it should be a process of purification by extraction-stripping using three (3) parameters of the feed flow rate, the acidity of the feed to the extraction process, and acidity in the stripping process. The mechanism of the extraction process takes UO₂ (NO₃)₂ will go into the organic phase TBP, whereas impurity are in the water phase (refined). Uranium in the organic phase stripping process is carried out by determining the acidity (as a parameter), in order to obtain a mixed solution UO₂ (NO₃)₂ pure nuclear (nuclear grade). As a bait used uranyl nitrate solution with levels of uranium amounted to 225.6282 gU/L. The results extraction process obtained the rate of feed water 15 L/h, the acidity of the feed to the extraction process by 3 M and obtained levels of uranium amounted to 48.5365 gU/L, while the stripping process is obtained UO₂ (NO₃)₂ amounted to 64.7860 gU/L the acidity of 0.04 M.