From 4-8 November, Sven Boden (SCK•CEN) was together with representatives from CEA, Sellafield Ltd and VUJE invited by the IAEA as experts to participate in the IAEA Regional Workshop on Characterisation of Areas Affected by Accidents or High Dose Rate Areas. Hosted by the RAW (State Enterprise Radioactive Waste) in Kozloduy (Bulgaria), the workshop covered aspects related to radiological characterisation for