Decommissioning of the nuclear reactors Ringhals 1 and Ringhals 2 in Sweden
Abstract
The purpose of this report is to provide the European Commission with general data relating to the decommissioning of the two nuclear reactors, Ringhals 1 (R1) and Ringhals 2 (R2), at the Ringhals Nuclear Power Plant (NPP) in Sweden. This data, along with calculations, will make it possible to determine whether the implementation of the decommissioning plans is liable to result in the radioactive contamination of the water, soil or airspace of another European Union member state. The report follows the guideline in Annex III of the recommendation of the application of Article 37 of the Euratom Treaty (2010/635/Euratom).
The Ringhals NPP comprises four reactors in total. Ringhals 1 is a boiling water reactor that started commercial operation in 1976. Ringhals 2 is a pressurized water reactor that commenced operation in 1975. The final shut down of Ringhals 1 is planned in December 2020. Ringhals 2 was shut down in December 2019.
Using conservative assessment methods and assumptions (e.g. ignoring filtration), the effective dose in the vicinity of the plant is demonstrated to be less than 0.01 millisievert (mSv) per year at the peak radioactive release year during normal operation (Chapters 3 and 4), and below 0.5 mSv during worst case unplanned release scenarios (Chapter 6). Based on this local dose it is concluded that the decommissioning project poses no risk to any other member state.
This report has been produced by the Swedish Radiation Safety Authority, SSM, mainly based on information provided by the licence holder, Ringhals AB. SSM has checked that the general data provides the necessary information and that it complies with the guideline of the most recent recommendations of the application of Article 37 of the Euratom Treaty.