Radiation protection and dispersion modelling

Radioactive substances comprise an area of research and method development in which FOI works to establish a scientific basis for assessments as to whether, in a given situation, radioactive substances can constitute a danger to people and, if so, what measures should be taken. Also covered is the development of radiological and nuclear (RN) forensic methods of working and analysis. The aim is to contribute to society’s ability to prepare itself for, and to manage, radiological incidents.

Radioactive agents and impact on health

The major customers in this field are the Swedish Armed Forces and other Swedish authorities but FOI also works with small and medium-sized businesses as well as with sister organisations and authorities in other countries. We also play an active part in Sweden’s national radiation protection emergency preparedness.

Measurement of radioactive substances

FOI possesses competence in the measurement, identification and analysis of radioactive and nuclear substances. We develop and adapt methods to ensure that they match the needs of the Swedish Armed Forces and other authorities.

This area covers various aspects of methods for the measurement of radioactive and nuclear materials, for example:

  • method development and validation
  • fundamental aspects of measurement-related processes
  • various measurement methods for a-, b-, g-emitting radioactive substances  
  • sampling, sample processing and the chemical separation of radionuclides
  • interpretation of measurement results in a forensic perspective

FOI has an analytical laboratory for radioactive and nuclear substances which is a unique national resource contracted to the Swedish Radiation Safety Authority as part of the national emergency preparedness system. The agency’s competence in this field is an essential prerequisite for the development and maintenance of the Swedish Armed Forces’ field laboratory. The laboratory also participates in the NATO Working Group SIBCRA (Sampling and Identification of Biological, Chemical and Radiological Agents) and is also open to other counties which are members of the Partnership for Peace. In addition FOI has an agreement with the Swedish National Laboratory of Forensic Science, SKL, and the Swedish Civil Contingencies Agency, MSB, regarding forensic CBRN analysis of which “Radioactive substances” form a part.

The principal assigning authorities in this area are the Ministry of Defence, the Swedish Armed Forces and the Swedish Radiation Safety Authority.

Radiation protection

FOI’s research in the field of radiation protection has two tracks. One track concerns the development of methods for the quantifying of radiation doses from external contamination, inhalation or ingestion of radioactive substances via food and drink, together with the development and evaluation of countermeasures. The other track focuses on the development of methods for the measurement of nuclide-specific radiation doses from, for example, radioactive fallout and exposed radiation sources. 

We work both in a laboratory environment and in the field. We also carry out field trials in which we test techniques, strategies and tactics as well as training personnel, for example from the Armed Forces, in detection and decontamination. 

FOI’s work in this area thus covers:

  • The development of measurement methods and computer simulations for determining human internal and external doses.
  • Laboratory for the testing of instruments for determining surface contamination of various materials including skin.
  • Laboratory for the testing and validation of radiation protection instruments where we can vary the preparation type, strength and geometry.
  • Sweden’s only mobile laboratory for the measurement of radioactive substances in humans.
  • One of the Swedish Radiation Safety Authority’s three mobile field laboratories for the detection of deposition and the identification of radiation sources.

Our competence is utilised by a range of authorities, for example within the Swedish Radiation Safety Authority as part of the emergency preparedness system and in their internal crisis management organisation where we form part of the national expert group for decontamination, NESA. We also participate in the NATO Armament Group Joint Radiological and Nuclear Defence sub-group and we are also open to countries which are members of the Partnership for Peace.


Last updated: 2024-01-17