Dispersion plume of 137Cs discharged from the Sellafield reprocessing plant
Annual discharge rates used for the simulation:
The highest activities of 137Cs had been discharged from 1974 to 1978, with
a maximum of over 5200 TBq in 1975. The simulation model above shows that
about 10 years are needed to reach the central Arctic Ocean. Accordingly,
highest concentrations of around 40 Bq/m3 had reached this area in the second
half of the 80th.