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Radon in Finland Radon is a colourless and odourless noble gas that is present in the indoor air in buildings. Radon prevention in the construction phase is easier and less expensive than implementing mitigation measures afterwards. Radon-bearing ...https://stuk.fi/en/radon-in-finland
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Finns are protected Finland has made preparations for radiation hazard situations in many ways, even though the likelihood of a serious radiation hazard situation is small. The radiation situation is constantly monitored throughout the country, an...https://stuk.fi/en/finns-are-protected
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Radiation in dailylife In the everyday environment, Finns suffer the most health damage from natural radiation - radon at workplaces, at home and in leisure apartments, and from UV radiation, which must be protected from with clothes, shade and cr...https://stuk.fi/en/radiation-in-dailylife
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Planning and monitoring The content of this page is provided by the Radiation and Nuclear Safety Authority (STUK). The page contains brief information about the planning and monitoring activities and financial figures. The related documentation is...https://stuk.fi/en/planning-and-monitoring
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Mushrooms 2025 campaign From July to November 2025, the Radiation and Nuclear Safety Authority (STUK) carried out an extensive measurement campaign on edible mushrooms. The aim of the campaign was to determine the activity concentrations of radioa...https://stuk.fi/en/mushrooms-2025-campaign
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Valitse kieli Suomi Välj språket Svenska Select language English Director General’s review For STUK, 2022 was a year of major planned and unplanned changes. Russia's invasion of Ukraine in February changed the daily schedule of many STUK employees...https://stuk.fi/en/director-general-s-review
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Radiation in appliances Electromagnetic fields from home, school and office equipment There are electric and magnetic fields in the vicinity of electrical appliances and wires in the home, school and office. Due to their low voltage, the electric ...https://stuk.fi/en/radiation-in-consumer-products-and-appliances
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Legislation and guides This section contains the most important legislation, regulations, directives and international agreements for STUK's activities. Stuklex (stuklex.fi) is a legal database compiled from the essential regulation applied in Fin...https://stuk.fi/en/legislation-and-guides
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For the media The communications service of the Radiation and Nuclear Safety Authority STUK is happy to help media representatives find the right expert to discuss about radiation and nuclear safety. You can also subscribe to STUK's press releases...https://stuk.fi/en/information-for-media
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Sustainability and responsibility Sustainable development is a continuous and managed social change taking place globally, regionally and locally, with the goal of securing good living opportunities for current and future generations. This also me...https://stuk.fi/en/sustainability
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Courses and Events Information about STUK's upcoming courses and events. 27-28 Oct 2025 MELODI workshop on medical radiation Hiddenhttps://stuk.fi/en/courses-and-events
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Valitse kieli Suomi Välj språket Svenska Select language English Director General’s review Like previous years, 2023 was a year of success for STUK. Professional and motivated personnel achieved monitoring and operational objectives as expected. S...https://stuk.fi/en/director-general-s-review-2023
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Nuclear security arrangements Nuclear security arrangements are measures to secure the use of nuclear energy from activities that endanger nuclear and radiation safety. Safety arrangements are implemented in the nuclear facility and its area as we...https://stuk.fi/en/nuclear-security-arrangements
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Sun's UV radiation Exposure to high levels of ultraviolet radiation (UV radiation) and burning of the skin increases the risk of skin cancer. Protection from the sun's UV rays is particularly important for children and people with fair skin, red h...https://stuk.fi/en/sun-s-uv-radiation
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Small modular reactors STUK is preparing for the possibility that there will be desire want to build smaller nuclear power plants with an electricity output of less than 300 megawatts and small nuclear power plants intended solely for heat product...https://stuk.fi/en/small-modular-reactors
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About STUK The purpose of the Radiation and Nuclear Safety Authority’s (STUK) operations is to protect people, society, the environment and future generations from the harmful effects of radiation. In this section, you can read about STUK’s operat...https://stuk.fi/en/about-stuk
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Alara magazine Alara magazine, published by the Radiation and Nuclear Safety Authority of Finland (STUK), was in circulation from 1992 to 2012. It covered topical issues related to the use of radiation, radiation safety, and nuclear safety. The ma...https://stuk.fi/en/alara-magazine
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Talvivaara mine The Talvivaara mine is Terrafame's multi-metal mine located in Sotkamo. Terrafame Ltd submitted an application to the State Council to start uranium production at the mine in late 2017. In spring 2018, the company submitted the app...https://stuk.fi/en/talvivaara-mine
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The content of this page is available in Finnish and Swedish. If you have any inquiries please contact us at [email protected] . Hiddenhttps://stuk.fi/en/warning-signs
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Measuring radon The most common method of measuring radon concentration in the indoor air in a dwelling or workplace is an alpha track detector, which reveals the long-term mean concentration. Reliable measurement should last at least two months ,...https://stuk.fi/en/measuring-radon