Estimating surface water risk at Oak Ridge National Laboratory: Effects of site conditions on modeling results

摘要

Multiple source term and groundwater modeling runs were executed to estimate surface water Sr-90 concentrations resulting from leaching of sludges in five 180,000 gallon Gunite(trademark) tanks at Oak Ridge National Laboratory. Four release scenarios were analyzed: (1) leaching of unstabilized sludge with immediate tank failure; (2) leaching of unstabilized sludge with delayed tank failure due to chemical degradation; (3) leaching of stabilized sludge with immediate tank failure; and (4) leaching of residual contamination out of the shells of empty tanks. Source terms and concentrations of Sr-90 in the stream directly downgradient of the tanks were calculated under these release scenarios. The following conclusions were drawn from the results of the