Releases of caesium-137 from Sellafield
Target4.2 Releases of substances that are hazardous to health or the environment will be eliminated.
IndicatorEstimated risk of releases from selected foreign sources that may affect Norway
Are we moving in the right direction? Published by the Norwegian Radiation Protection Authority
The caesium-137 discharges from Sellafield were very high during 1975-1980. The highest discharge was registered in 1975 (5200 TBq). This is equivalent to the total fallout of caesium-137 to the Baltic Sea after the Chernobyl accident in 1986.
The discharges are now at a much lower level. Two new treatment plants at Sellafield in 1986 resulted in a considerable reduction in discharges. In recent years the yearly discharges to the Irish Sea have been less than 10 TBq caesium-137. In 2016, the discharges were 3.72 TBq.