An isotope dilution-precipitation process for removing radioactive cesium from wastewater

► Developed an isotope dilution-precipitation treatment process for Cs-137 contaminated water. ► Waste seeded with non-radioactive Cs-133 prior to precipitation with sodium tetraphenylborate. ► Final Cs-137 concentrations below DOE discharge limit of 3.0 × 10−6 μCi/mL can be achieved. ► Synthetic wastewater, and industrial low level radioactive proof of principle studies completed.