The radiation status of the environment is continuously monitored. Environmental radiation monitoring system is set to alarm if any unusual levels of radiation are measured, even far below the official limits. Fortum renewed Loviisa power plant's environmental radiation monitoring system in 2012-2014 . New weather monitoring system will replace the old system in 2014.
Erecting Loviisa power plant's new weather mast in April 2014. (Fortum, Aki Mattila).
Radiation control measures are aimed to prevent and limit health hazards and other detrimental effects of radiation at all times and situations. Loviisa power plant's annual emissions, including radioactive emissions, have always measured to a fraction of the permitted levels throughout the plant's operational history . For example, in 2013 the radioactive emissions into air were 0.1% (iodine) and 0.5% (noble gases), and into water 0.11% (tritium) and 0.0003% (other radioactive nuclides) of the annual permitted level.
As part of Loviisa power plant's emergency preparedness, instructions for an incident involving radiation hazards have been prepared together with the Radiation and Nuclear Safety Authority STUK and Eastern-Uusimaa Emergency Services Department. The instructions are available online and delivered by mail to all households and offices in the surroundings of the power plant.
In the case of a radiation hazard, the rescue authorities are responsible for informing the general public about the hazard and issuing instructions for taking shelter indoors, taking iodine tablets, and evacuation. The purpose of the protective steps is to prevent immediate health hazards and to mitigate the radiation impact.