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      • Radon
        • Radon causes lung cancer
        • Sources of radon
        • Reference values and regulations concerning radon in dwellings
        • Radon in Finland
          • Radon maps of Finland
        • Radon in new buildings
          • Regulations and guidelines for new buildings
          • Effect of building land and building materials
          • Foundation type
          • Sealing
          • Installation of radon piping
          • Complementary instructions
        • Radon mitigation
          • Choice of mitigation method
            • Sub-slab suction
            • Sealing of structures
            • Radon well
            • Ventilation-based mitigation
            • Radon mitigation in blocks of flats
            • Radon mitigation in workplaces
          • Radon mitigation costs
        • Radon-free childhood
          • Radon and health
          • Radon protection
          • Frequently asked questions
      • Sun beds
      • Use of radiation in health care
        • Radiographic examinations
          • Radiation doses of radiographic examinations
        • Dental X-ray
        • Radiotherapy
        • Nuclear medicine
        • Ultrasonography
        • Magnetic imaging
        • Exposure of employees
        • Radiographic examinations on animals
      • Mobile telephones and base stations
        • Mobile phones are a major source of radio frequency radiation
        • General population is only minimally exposed to the fields generated by base stations
        • No evidence of health hazards
        • Exposure can be reduced by simple means
        • Electromagnetic hypersensitivity
      • Transmission of electricity and power lines
        • Transmission and distribution of electricity
        • Power lines produce electric and magnetic fields
        • There is no absolute certainty about the health effects of power lines
        • STUK recommends sensible caution
        • Transmission lines in urban planning
        • Distribution lines and substations
        • Household electrical equipment and wiring
      • Use of radiation in beauty care
        • Various treatments and their risks
      • Lasers
        • Why can lasers be dangerous?
        • Safety classes of laser products
        • Laser equipment in beauty care
      • Nuclear power plants
        • Nuclear power plants in Finland
        • How a nuclear power plant works
        • Safety principles
          • Defence-in-depth safety approach
          • Multiple barriers protect the environment
      • Nuclear facility projects
        • Safety goals
        • Olkiluoto 3
          • News concerning Olkiluoto 3
        • The nuclear facility project of Fennovoima
          • Nuclear waste of Hanhikivi nuclear power plant
        • The encapsulation and final disposal facility of spent nuclear fuel
        • Decommissioning of the research reactor
          • STUK’s tasks in the research reactor licensing process
      • Nuclear waste
        • What is nuclear waste?
        • Nuclear waste in Finland
        • The safety of the disposal of nuclear waste in Finland
        • Categories of radioactive waste and emissions
        • Disposal of spent fuel in Finland
        • Disposal of low and intermediate-level waste in Finland
        • The decommissioning of nuclear facilities
      • Mining
        • Exploration and the EIA procedure
        • Uranium concentrations in Finnish bedrock and waterways
        • Mining and underground excavation
        • The Terrafame mine
          • Uranium concentrations in water and other samples obtained from the environment at the Talvivaara mine
      • Environmental radiation
        • Radiation today
        • Radiation in Europe - Eurdep
        • Radioactivity in outdoor air
        • Deposition
          • Deposition samples collected on a continuous basis
          • The effects of the Chernobyl accident in Finland
          • Nuclear tests in the atmosphere
        • Radioactivity in drinking water
        • Radioactivity in milk
        • Natural background radiation
        • Radioactivity in the Baltic Sea
        • Radioactivity in forests
        • Radioactivity elsewhere in the world
          • Chernobyl nuclear power plant accident
          • Fukushima nuclear power plant accident
      • Food and drinking water
        • Food control in Finland and maximum values for food
        • The radiation dose received from food is low
        • Wild berries and mushrooms
          • Radioactive cesium concentration in mushrooms can be reduced
          • Radiation dose from wild berries and mushrooms
        • Meat, game and fish
          • Cesium in reindeer meat by reindeer herding district
        • Vegetables
        • Low radioactive concentrations in grain
        • Radioactivity in drinking water
        • Milk
      • Emergencies
        • Finns are protected
        • Accident impact
        • What to do in a radiation hazard situation
          • Radiation dose is reduced by sheltering indoors
          • Why take iodine tablets
        • Examples of radiation doses and external dose rates
        • The International Nuclear and Radiological Event Scale INES
      • What is radiation
        • Applications of radiation
        • Health effects of radiation
        • Electromagnetic fields
        • The human body always contains radioactive substances
    • STUK supervises
      • STUK is a regulatory control authority
      • STUK monitors the radiation safety of the environment
        • Continuous regulatory control programme
          • Depositions in eight localities
          • Radioactivity in surface water
          • Radioactivity in drinking water
          • Radioactivity in milk
          • Radioactivity in food
          • Radioactivity in sludge
        • Thematic investigations
        • Monitoring of environmental radiation in nuclear power plants
      • Nuclear safety
        • STUK’s duties in the supervision of nuclear safety
          • STUK sets safety requirements
          • Regulatory oversight of facility projects
          • Safety analyses
          • Regulatory oversight of facilities’ operating conditions
          • Regulatory oversight of facility modifications
          • Regulatory oversight of operations in organizations
            • Investigations concerning Olkiluoto 3
          • Regulatory oversight of radiation safety
            • Employee radiation exposure in nuclear power plants
            • Discharge of radioactive substances into the air
            • Discharge of radioactive substances into the sea
            • Estimating the population's exposure
          • STUK approves inspection organisations for nuclear facilities
          • Regulatory oversight of nuclear waste management
          • Nuclear material regulation
        • STUK participates in the licensing of nuclear facilities
          • Decisions regarding nuclear facilities
          • OL3 construction licence
          • Operating licence
          • Periodic safety reviews
      • Nuclear security arrangements
        • What nuclear security arrangements are
        • Preventive measures
        • Detection of and response
        • Cooperation in Finland and internationally
      • Practice that causes exposure to natural radiation
        • Radon at the workplace
          • Areas requiring radon measurements in workplaces
          • Workplace radon concentrations in Finland
          • Radon concentration during working hours
        • Radon in underground mines and at excavation sites
      • Measurements of mobile phone radiation
      • Using non-ionizing radiation in beauty care
    • Services
      • General terms of delivery of measurement services
      • Calibration, testing and irradiation services
      • AASI - Program for simulating energy spectra in alpha spectrometry
    • Regulations
      • STUK Regulations
      • STUK's regulatory guides
        • Regulatory Guides on nuclear safety and security (YVL)
        • Regulatory Guides on radiation safety (ST)
        • STUK’s decisions on radiation safety
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    • About us
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      • Cooperation
        • International Reporting
          • Nuclear Safety Convention
          • Joint Convention
        • International Nuclear Safety Cooperation
        • Cooperation on radiation and nuclear safety in Finland’s neighbouring areas
        • Cooperation on nuclear safety funded by EU
        • Cores - Finnish Consortium for Radiation Safety Research
          • National Radiation Safety Research Programme
          • Aims of Cores
          • European collaboration
          • Members of Cores
          • Cores Executive Board
          • More information on Cores
          • Events
            • Cores symposium on non-ionizing radiation research and safety
            • Cores Symposium on radon and NORM 3-4 September 2019
          • Subscribe to Cores Newsletter
        • International collaboration on radiation safety
      • International reviews of STUK’s operations
      • Contact information
        • Personnel
        • Environmental Radiation Surveillance and Emergency Preparedness
        • Nuclear Reactor Regulation
        • Nuclear Waste Regulation and Safeguards
        • Radiation Practices Regulation
      • How to reach us
      • STUK online
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    • STUK’s mission is to ensure radiation and nuclear safety in Finland
    • Radon Free Childhood
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Updated 6 Sep 2019
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  • Frontpage
  • What´s new
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  • Regulations
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  • About us
  • STUK’s mission is to ensure radiation and nuclear safety in Finland
  • Radon Free Childhood
 
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Administrative sector of the Ministry of Social Affairs and Health
Radiation and Nuclear Safety Authority (STUK) supervises radiation and nuclear safety in Finland. The purpose of STUK is to protect people, society, the environment and future generations from the detrimental effects of radiation.
stm.fi The Ministry of Social Affairs and Health
fimea.fi The Finnish Medicines Agency Fimea
thl.fi The National Institute for Health and Welfare
ttl.fi Finnish Institute of Occupational Health
tyosuojelu.fi Occupational Safety and Health Administration
valvira.fi National Supervisory Authority for Welfare and Health
stuk.fi Radiation and Nuclear Safety Authority (STUK)