Modelling Environmental Impacts of Cesium-137 Under a Hypothetical Release of Radioactive Waste.

Waste tanks at the nuclear facility located at Sellafield, UK, represent a nuclear source which could release radionuclides to the atmosphere. A model chain which combines atmospheric transport, deposition as well as riverine transport to sea has been developed to predict the riverine activity concentrations of Cs. The source term was estimated to be 9 × 10 TBq of Cs, or 1% of the assumed total Cs inventory of the HAL (Highly Active Liquid) storage tanks.