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Quality System The quality system of the Radiation Metrology Laboratory is internationally recognized. The laboratory participates in the international CIPM MRA Mutual Recognition Arrangement coordinated by the International Bureau of Weights and ...https://stuk.fi/en/quality-system
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Safety principles Assurance of nuclear safety is based on general principles that have been formed by experience and research. According to these principles, safety is ensured by so-called defence in depth and multiple arrangements. The aim is to ...https://stuk.fi/en/safety-principles
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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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Reporting on nuclear safety Valitse kieli Suomi Välj språket Svenska Select language English Inspections at the Loviisa nuclear power plant STUK carries out inspections to oversee the operation and use of the Loviisa nuclear power plant. The perio...https://stuk.fi/en/inspections-at-the-loviisa-nuclear-power-plant
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Reporting on nuclear safety Valitse kieli Suomi Välj språket Svenska Select language English Inspections at the Olkiluoto nuclear power plant STUK carries out inspections to oversee the operation and use of the Olkiluoto nuclear power plant. The p...https://stuk.fi/en/inspections-at-the-olkiluoto-nuclear-power-plant
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Nuclear facility operations Regulatory oversight during the operation of the nuclear facility includes continuous safety assessments. By conducting supervision during operation, STUK aims to ensure that the nuclear facilities are and will remain i...https://stuk.fi/en/nuclear-facility-practices
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Reporting on nuclear safety Valitse kieli Suomi Välj språket Svenska Select language English Oversight reports of spent nuclear fuel final disposal facility STUK carries out inspections of the spent fuel encapsulation and disposal facility in Olki...https://stuk.fi/en/oversight-reports-of-final-disposal-facility
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Radon mitigation Radon mitigation can easily reduce radon concentration in indoor air. The most effective mitigation methods are sub-slab suction and a radon well. Before starting the mitigation, it is important to check that the ventilation is wo...https://stuk.fi/en/radon-mitigation
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Radiation safety of nuclear facilities Control of radiation safety is a part of the supervision of the operating condition of a nuclear power plant. The objective is to ensure that the total radiation exposure caused by the operation of the nuclea...https://stuk.fi/en/radiation-safety-of-nuclear-facilities
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Valitse kieli Suomi Välj språket Svenska Select language English International co-operation has a clear direction and purpose In 2024, STUK supported the operations of the Ukrainian radiation authority and the EU’s common situational awareness and...https://stuk.fi/en/international-co-operation-has-a-clear-direction-and-purpose
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The International Nuclear and Radiological Event Scale INES Much attention has been paid to the communication of nuclear and radiological events since the Chernobyl accident. INES, the International Nuclear and Radiological Event Scale, has contri...https://stuk.fi/en/the-international-nuclear-and-radiological-event-scale-ines
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Olkiluoto 3 The newest nuclear power plant unit in Finland is Olkiluoto 3, which is located in Olkiluoto, Eurajoki, Finland, owned by Teollisuuden Voima Oyj (TVO). STUK has supervised the project from the design of the plant unit through manufactu...https://stuk.fi/en/en/olkiluoto-3
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Operation of a nuclear facility When the nuclear facility is completed, the facility still has to apply for an operating permit from the Government. The operating permit is granted for a limited period of time, and its extension requires a safety ...https://stuk.fi/en/operation
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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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What could threaten Finland? Impacts of a radiation accident can only affect a large area if large amounts of radioactive gases and particles are released into the air. Depending on the weather conditions, a serious nuclear power plant accident in...https://stuk.fi/en/what-could-threaten-finland-
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Strategy As climate change, the energy transition, inequality and the tightened global security situation reshape and challenge societies, we must better understand how and in what ways the use of radiation and nuclear energy affects them. We need...https://stuk.fi/en/strategy
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Valitse kieli Suomi Välj språket Svenska Select language English Radiation safety data and tools on: 2024 research projects The Radiation and Nuclear Safety Authority (STUK) develops its own and national competence in several research and developm...https://stuk.fi/en/radiation-safety-data-and-tools-2024-research-projects
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Before construction of nuclear facility The first stage of a new nuclear power plant project is the environmental impact assessment. The aim is to reduce or completely prevent the adverse environmental impacts of the project. After this, the nucle...https://stuk.fi/en/before-construction
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Radiation situation in Ukraine The war in Ukraine does not affect the radiation situation in Finland. Nor can any accident or damage related to radioactive materials or nuclear power plants in Ukraine cause a situation in which people in Finland n...https://stuk.fi/en/situation-in-ukraine
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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