PNNL

Abstract

Recent experiments have shown that atmospheric radioxenon passing over a sampling site can be transported into the shallow subsurface by barometric pressure changes. The STOMP simulator is used to examine the impact of seven hydrologic/geologic parameters and water infiltration on the imprinting of radioxenon from a transient plume during two pressure scenarios. Soil hydraulic conductivity was found to be the dominant factor in the amount of xenon imprinted to two meters, particularly in the case when plume passage coincides with increasing pressure.