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Radiation and radon

The Danish Health Authority undertakes all regulatory functions and statutory duties related to radiation protection – wherever ionising radiation exists, is used or produced.

General information

Ionising radiation

Radiation is the transfer of energy and can be generated naturally or artificially.  Learn more in

Ionising Radiation – Exposure Pathways in Denmark

Radon in the Nordic countries

Radon levels in dwellings in the Nordic countries, except for Iceland, are high, in Finland, Norway and Sweden among the highest in the world. There is strong direct evidence that long-term exposure to radon increases the risk of lung cancer, which makes it particularly important to identify dwellings with high radon concentrations and take remedial measures in these dwellings.

Recommendations for radon in dwellings in the Nordic countries


Guide for service companies - Radiation generators

The purpose of the Guide is to contribute to the correct interpretation and application of the rules regarding the use of radiation generators. The rules are laid down in the Radiation Protection Act and related executive orders. 

Radiation generators – for service companies


Thule Air Base

Radioativity following the accident

In January 1968, an American B-52 bomber crashed into the sea ice in the vicinity of Thule Air Base in Greenland. As a result of the accident, radioactive material from the damaged nuclear weapons was dispersed in smoke from the burning engine fuel.

Learn more in:

Investigation into terrestrial radioactive contamination at Thule and assessment of radiation doses

(Greenlandic version is also available)

The Thule Accident - Assessment of Radiation Doses from Terrestrial Radioactive Contamination

(Greenlandic version is also available)


Updated 27 JAN 2021