The operators of Swiss nuclear power plants are responsible for the safety of their plants. The Swiss Federal Nuclear Safety Inspectorate (ENSI) monitors the facilities and ensures that all statutory safety requirements are met.
Responsible and trouble-free operation, together with the protection of staff and the public, form the basis for the operation of nuclear power plants and their acceptance within the economy and society. Safety is the top priority for plant operators, and Swiss standards are among the highest in the world.
Protection against radiation must be guaranteed at all times. In order to achieve this and reliably comply with the limit values, every nuclear power plant has structural and technical barriers as well as a system of safety measures with multiple layers of redundancy, which enable potential incidents triggered by internal or external factors to be safely brought under control.
During the operation of a nuclear power plant, small quantities of radioactive substances are produced from the activation of construction materials. Radioactive emissions from a nuclear power plant into the environment are strictly regulated. To monitor the public's exposure externally, here are limits for the local dose rate. The nuclear power plants measure these themselves. In addition, the Federal Office of Public Health (FOPH), ENSI and the National Emergency Operations Center (NEOC) use measuring stations to independently monitor emissions into water or the air. The data is continuously published on the Internet.
Nuclear power plants are designed to be able to withstand even an extremely severe earthquake or other extreme events that could occur once every 10,000 years. All Swiss nuclear power plants have provided ENSI with this proof.
If the nuclear power plants are unable to furnish this proof, ENSI will temporarily decommission them. Operation cannot resume until the plant has been retrofitted accordingly.
In the event of an incident involving the release of radioactive substances, the authorities will instruct the public to take potassium iodide tablets. This prevents radioactive iodine, which is absorbed through the respiratory tract, from accumulating in the thyroid gland. However, potassium iodide tablets do not provide general protection against radiation that affects the body from the outside. Information on the subject of iodine tablets can be found on the following website: www.kaliumiodid.ch
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