[en] A precipitation and adsorption process has been developed to remove cesium, strontium, and plutonium from high-level radioactive waste salt solution. Sodium tetraphenyl borate (STPB) is used to precipitate cesium, and sodium titanate slurry is used to sorb strontium and plutonium. The precipitate/adsorbate is separated from the decontaminated salt solution by crossflow filtration. This process has the potential of being implemented in existing waste tanks and would result in significant capital savings compared to an ion-exchange process for salt decontamination. Chemical and small-scale engineering studies with actual waste are reported. The effect of many variables on the decontamination factors and filter performance is defined