Tromler med radioaktivt affald på mellemlager

Radioactive waste stored in steel drums.


Preliminary studies of concepts for a final repository were carried out from 2009 to 2014.

In March 2015, the Danish parliament decided to elaborate studies leading towards an intermediate long-term storage facility for Danish low- and intermediate radioactive waste (LILW).

The studies regarding operation, economy, localization criteria and comparative safety levels of an intermediate storage facility were completed in late 2016.

Danish Decommissioning was assisted by COWI consulting group in the studies of operation, economy and safety. Read their report published in August, 2016.

A study of localization criteria was conducted by The Geological Survey of Denmark and Greenland. Read a summary of the total long-term storage studies.

On 15 May 2018, resolution B 90 was adopted unanimously by Danish parliament. The resolution outlines a long-term solution for Denmark's radioactive waste. The key points are:

  • Intermediate storage of waste continues at Risø for a period of up to 50 years. Storage facilities will be upgraded and moved onto higher grounds to ensure safekeeping of the waste
  • Efforts to find an international solution for the 233 kg of special waste are continued
  • A geological survey of the Danish possibilities for a deep facility for all waste is initiated
  • A thorough political process involving municipalities and other relevant stakeholders is planned and executed
  • A final repository should be ready in 2073 at the latest

Read more about the political process at the website of Ministry of Higher Education and Science.

In 2003, the Danish parliament gave its consent for the Government to start preparing a 'basis for decision' for a final repository for Denmark's low- and intermediate level radioactive waste. Preliminary studies of concepts were carried out from 2009-2014. Further studies are paused until further notice.

DD's part of the preliminary investigations concerns the theoretical studies of three different concepts for the repository, each located in four different typical Danish geological settings. These studies ran from October 2009 until April 2011.

Read more details of repository concept and geology

Read the full Pre-feasibility study (published May 2011)


The radioactive waste is estimated to a total amount of up to 10,000 m3 and can be grouped as follows:

  • Decommissioning waste from the nuclear facilities at Risø
  • Existing waste of low activity originating from the operations at the nuclear facilities at Risø and from external users
  • Existing waste of intermediate activity originating from the nuclear facilities at Risø
  • Special waste (mainly spent fuel used for post irradiation experiments and larger α-sources)
  • Contaminated concrete and tailings (the latter classed as potential waste only)

A large part of the waste has been conditioned in 210-litre concrete-lined waste drums. Waste packed in large ISO or steel containers has not yet been conditioned. The conditioning of the 'special waste' in particular will depend on the choice of repository concept.