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Sealed sources Sealed sources are radioactive sources containing radioactive material that has been encapsulated in a solid, impenetrable capsule, preventing the radioactive material from spreading to its surroundings. From a sealed source the rad...https://stuk.fi/en/sealed-sources
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Construction of a nuclear facility Following the decision-in-principle, the party in charge of the project must apply for and be granted the Government’s licence to construct the nuclear facility. In connection with the construction licence, the a...https://stuk.fi/en/construction
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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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Laser Lasers are now widely used in our everyday lives. They can be found at home, at work and are used for a wide range of applications. Lasers are a valuable scientific tool in materials, pharmaceutical and forensic science, and play an importan...https://stuk.fi/en/laser-products
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STUK Regulations The Radiation and Nuclear Safety Authority's regulations are issued under the Radiation Act (859/2018) and the Nuclear Energy Act (990/1987). The regulations of the Radiation and Nuclear Safety Authority specify the provisions of ...https://stuk.fi/en/stuk-regulations
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Inspection organisations STUK authorises inspection organisations to inspect pressure equipment, other mechanical equipment as well as steel and concrete structures for nuclear facilities. Operation of STUK-approved inspection organisations is sub...https://stuk.fi/en/inspection-organisations
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Calculation tools Although in most cases measurement is the best way to determine the radiation dose rate or radiation dose, there are situations where calculation methods are more suitable or can replace measurement. Below is a list of calculatio...https://stuk.fi/en/calculation-tools
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Nuclear weapons A nuclear weapon is a bomb whose destructive power is mainly based on the pressure wave and thermal radiation created by the explosion. Another threat is radiation from both radioactive substances released by the explosion and neut...https://stuk.fi/en/nuclear-weapons
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Depleted uranium Depleted uranium is a by-product of the production of uranium fuel used in nuclear power plants. It is used, for example, in aircraft counterweights and in the keels of sailboats. In addition, depleted uranium is used in munitions...https://stuk.fi/en/depleted-uranium
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About Radon Radon is an odourless and invisible radioactive gas that can occur in indoor air. Measurement is the only way to find out the radon concentration. This section contains important information about radon. Radon in Finland Indoor air rad...https://stuk.fi/en/about-radon
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Open data The content of this page is available in Finnish. Contact us: [email protected] Hiddenhttps://stuk.fi/en/open-data
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Regulatory guide on preparedness (VAL) The VAL 1 guide concerns the protective actions in the early and intermediate phases of a nuclear or radiological emergency. Protective actions are measures aimed to minimise the radiation exposure of the pub...https://stuk.fi/en/val-guides
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Radiation safety The goal of our operations is a radiation-safe Finland. Radiation safety is created as a result of the work of people who know their responsibilities. We work in good cooperation with other authorities, organizations and the entir...https://stuk.fi/en/radiation-safety
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Contacting our experts For contacting our experts and giving feedback on our activities, we kindly request you to use the form below. For example, you can send us a question about radiation in the environment, radiation protection licenses and use...https://stuk.fi/en/send-message
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Nuclear safety STUK supervises nuclear safety in Finland. The license holder is responsible for the safety of nuclear energy use, but STUK sets the safety requirements and oversees their compliance. STUK's supervision includes nuclear facilities, ...https://stuk.fi/en/nuclear-safety
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Advisory Committees The operation and development of STUK is supported by four advisory committees consisting of external members: STUK Advisory Committee Established in spring 2008, this advisory committee is summoned by STUK’s Director General. ...https://stuk.fi/en/advisory-committees
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Food control The Radiation and Nuclear Safety Authority (STUK) monitors the radioactivity of food in order to ensure that radiation levels in products are acceptable for human use. Furthermore, the results provide information that is useful for re...https://stuk.fi/en/food-control
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MetroPOEM project Metrology for the harmonisation of measurements of environmental pollutants in Europe Measurements of environmental pollutants are developed and harmonised in a new three-year project, funded by The European Partnership on Metrol...https://stuk.fi/en/metropoem-project
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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