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Radiation and Nuclear Safety Authority in 2023 Valitse kieli Suomi Välj språket Svenska Select language English Director General’s review STUK monitors around the clock Decommissioning of Finland’s first nuclear reactor started STUK prepares for t...https://stuk.fi/en/year-2023-in-STUK
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Radiation and Nuclear Safety Authority in 2023 Valitse kieli Suomi Välj språket Svenska Select language English Director General’s review STUK monitors around the clock Decommissioning of Finland’s first nuclear reactor started STUK prepares for t...https://stuk.fi/en/year-2023-in-stuk
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Valitse kieli Suomi Välj språket Svenska Select language English Active radon regulation and communication One of the tasks of the Radiation and Nuclear Safety Authority (STUK) is to carry out radon regulation at workplaces. According to a study p...https://stuk.fi/en/radon-monitoring-and-communication
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Radiation dose received from food Man-made radioactivity in food is monitored by collecting daily portions of solid food from institutional kitchens in three different locations over a period of one week. Drinks are collected for one day only. The...https://stuk.fi/en/daily-food-and-drink
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The human body always contains radioactive substances Our environment contains radioactive substances of both natural and artificial origin. They enter the human body in food, drinking water or inhaled air. In the body, radioactive substances expo...https://stuk.fi/en/radioactivity-in-human-body
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Radiation and Nuclear safety Authority of Finland Radiation and Nuclear Safety Authority’s (STUK) key task is to supervise the use of radiation and nuclear energy in Finland. STUK oversees that all operators comply with the common rules. Our field...https://stuk.fi/en/get-to-know-stuk
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Indoor air alpha track radon detector measurements Radon is an odourless and invisible radioactive gas that can be present in indoor air. Long-term exposure to high radon levels considerably increases the risk of lung cancer. Radon is undetectable...https://stuk.fi/en/indoor-air-radon-measurements
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Nuclear power plant accidents around the world A reactor at the Chernobyl nuclear power plant in the Soviet Union (present Ukraine) was destroyed in an explosive manner in 1986. The complete destruction of the reactor caused a massive release of r...https://stuk.fi/en/nuclear-power-plant-accidents
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Radon causes lung cancer Radon is a colourless and odourless noble gas that is present in the soil and can penetrate the indoor air of buildings. Long-term exposure to high radon levels increases the risk of lung cancer. Radon exposure is estimate...https://stuk.fi/en/radon-causes-lung-cancer
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Loviisa nuclear power plant The two nuclear power plant units located in Hästholmen, Loviisa, are owned by Fortum Power and Heat Oy. Loviisa 1 was taken into commercial use in 1977 and Loviisa 2 in 1981. In terms of its type, the Loviisa facility ...https://stuk.fi/en/loviisa-nuclear-power-plant
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Dental X-ray practices The purpose of this guideline is to facilitate the interpretation of radiation legislation and, thereby, to promote radiation safety in practice. This guideline is not binding as such, but they reflect STUK's view on how the...https://stuk.fi/en/dental-x-ray-practices
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Use of radiation in medicine Since the use of radiation may cause harm in addition to benefits, physicians must consider the necessity of radiological examinations, interventional procedures or radiotherapy on a case-by-case basis. These considera...https://stuk.fi/en/use-of-radiation-in-medicine
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Measurement of radioactivity in samples Determinations of the radioactivity of the samples are offered e.g. for tritium, strontium, plutonium and americium, uranium, lead and polonium, as well as radon and long-lived alpha-active substances. In ad...https://stuk.fi/en/measurement-for-radioactivity-in-samples
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STUK's regulatory guides The Radiation and Nuclear Safety Authority publishes regulations and guides describing the level of requirements for radiation and nuclear safety supervision. STUK's regulatory guides Regulatory Guides on nuclear safety (Y...https://stuk.fi/en/stuks-regulatory-guides-and-decisions
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Information on nuclear power plants A nuclear power plant is a thermal power plant designed to produce electricity, where heat is generated by the fission reaction of uranium atoms in the reactor instead of by the combustion of conventional fuel. ...https://stuk.fi/en/nuclear-power-plants
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STUK's radon monitoring projects at workplaces The Radiation and Nuclear Safety Authority (STUK) monitors radon concentrations at workplaces and radon exposure of workers in Finland. The monitoring is mainly carried out by the employer measuring t...https://stuk.fi/en/stuks-monitoring-projects-at-workplaces
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Valitse kieli Suomi Välj språket Svenska Select language English STUK monitors around the clock The Radiation and Nuclear Safety Authority (STUK) maintains continuous preparedness. The system is spearheaded by the expert on call, who generally rec...https://stuk.fi/en/stuk-monitors-around-the-clock
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Working at STUK We employ over 300 people. We are experts in many different fields, but we all work together to achieve the shared goal – radiation safety. The purpose of all our activities is to protect people, society, the environment and future...https://stuk.fi/en/stuk-as-a-workplace
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Radioactivity of the deposition Deposition refers to radioactive substances that have fallen to the ground or water from air. Deposition may come with rain as a wet deposition or as a dry deposition. Analyzing deposition samples provides informati...https://stuk.fi/en/radioactivity-of-the-deposition
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Health effects of radiation Units of measurement: Gray (Gy) Unit of an absorbed dose, indicating how much energy the ionizing radiation gives out to the target substance. 1 Gy = 1 J/kg. Sievert (Sv) A unit of radiation dose indicating the health d...https://stuk.fi/en/health-effects-of-radiation
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Reporting on nuclear safety Valitse kieli Suomi Välj språket Svenska Select language English In this section, we report on the regulatory oversight of nuclear safety and security carried out by the Radiation and Nuclear Safety Authority (STUK) and...https://stuk.fi/en/reporting-on-nuclear-safety
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Radioactivity in consumer products The use of radioactive substances in consumer products is restricted by radiation legislation. However, some products may contain small quantities of radioactive substances that may have been added for properties...https://stuk.fi/en/radioactivity-in-consumer-products
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Radioactivity in surface water Analyzing radioactive materials in surface waters provides information on their time behaviour. Samples taken from different bodies of water indicate the geographic variation of radionuclides. Starting from 2024, the...https://stuk.fi/en/radioactivity-in-surface-water
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Radon in new buildings Radon prevention in new construction is important in order to ensure low radon concentrations in indoor air. Radon prevention in the construction phase is easier and less expensive than implementing mitigation measures after...https://stuk.fi/en/radon-in-new-buildings
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Radiation and Nuclear Safety Authority in 2022 Valitse kieli Suomi Välj språket Svenska Select language English Director General’s review The new office building in Vantaa meets STUK's special requirements Intensive year of supervision in Olkiluot...https://stuk.fi/en/year-2022-in-stuk
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How to reach us - directions Radiation and Nuclear Safety Authority (STUK) Jokiniemenkuja 1, 01370 Vantaa Opening hours: 8.00-16.15 Main entrance on the Jokiniemenkatu side (Jokiniemenkatu 28) Link to the map: https://maps.app.goo.gl/6WvtBGq5Q6cFL...https://stuk.fi/en/how-to-reach-us
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Equality and non-discrimination The Equality Act and the Non-Discrimination Act require employers to systematically promote non-discrimination and gender equality and to draw up a workplace-specific equality plan and a non-discrimination plan. Equ...https://stuk.fi/en/equality-and-non-discrimination
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Radioactivity in outdoor air STUK monitors the levels of radioactive substances outdoors at eight localities in Finland. You can retrieve measurement data from different periods by first selecting the location. The measurements are very accurate a...https://stuk.fi/en/radioactivity-in-outdoor-air
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Valitse kieli Suomi Välj språket Svenska Select language English Cooperation with Ukraine strengthened Russia's war of aggression in Ukraine which began in 2022 has changed the country’s radiation and nuclear safety situation. In 2023, the Nordic ...https://stuk.fi/en/cooperation-with-ukraine-strengthened
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Radiation and Nuclear Safety Authority in 2024 Valitse kieli Suomi Välj språket Svenska Select language English General Director's review We strive for radiation-safe well-being A year of developing preparedness The use of nuclear energy carried o...https://stuk.fi/en/year-2024-in-stuk
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Radiation situation in Europe The EURDEP platform is operated by the Joint Research Centre (JRC) of the European Commission. EURDEP (EUropean Radiological Data Exchange Platform) is the European information exchange system for radioactivity measur...https://stuk.fi/en/radiation-in-europe
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Beauty care and sunbeds Radiation is used in many beauty treatments such as hair removal, skin cleansing, hardening lash glue or treatments to improve the appearance of the skin. The radiation used can be ultrasound, visible light, electromagnetic...https://stuk.fi/en/beauty-care-and-sunbeds
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What is UV radiation? The sun's ultraviolet (UV) radiation is the most important source of UV radiation in the living environment. Exposure of the skin to large amounts of UV radiation and skin burn increase the risk of skin cancer. UV radiation c...https://stuk.fi/en/what-is-uv-radiation
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Monitoring of environmental radiation The purpose of the surveillance of environmental radiation is to assess the radiation safety of the Finnish environment. The concept of environment refers to factors that are present in the natural or built en...https://stuk.fi/en/monitoring-of-environment-radiation
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E-services and forms 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/forms
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Press releases and news Current press releases and news from STUK are published here. Please enter one or more search word Select year All 2026 2025 2024 2023 2022 2021 Search Clear 106 results 03.09.2026 12.01 Press release IAEA Press Release: IA...https://stuk.fi/en/press-releases-and-news
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organisation and management team The Radiation and Nuclear Safety Authority (STUK) is the authority responsible for supervising radiation and nuclear safety in Finland. STUK’s operations are based on the Act on the Radiation and Nuclear Safety Aut...https://stuk.fi/en/organisation-and-management-team
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Information on STUK's website You have arrived at the website of the Radiation and Nuclear Safety Authority (STUK), which was launched in May 2023. The Stuk.fi website is STUK’s central channel of information, which provides information on matters...https://stuk.fi/en/information-on-stuk-s-website
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Preparedness for radiation hazards Although the likelihood of a serious radiation hazard situation in Finland is small, preparations have been made, as an accident cannot be completely ruled out. The Radiation and Nuclear Safety Authority (STUK) m...https://stuk.fi/en/preparedness-for-radiation-hazards
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Cooperation STUK supervises and develops Finland’s radiation safety in co-operation with domestic and foreign partners. Important domestic partners include, for instance, different ministries: the Ministry of Social Affairs and Health in matters r...https://stuk.fi/en/networks-and-co-operations