In 2015, the radiation level at the site boundary of the Borssele nuclear power plant was below the maximum permitted level. This is the conclusion of this report, which is based on measurements carried out by the RIVM on location.
The permit, granted following the Dutch legislation on the use of nuclear energy, requires that the maximum effective dose received by persons outside the site boundary of Borssele NPP does not exceed 40 microsievert annually. Control measurements of the radiation level were therefore carried out at eight locations at the site boundary.
This is done within the framework of the MONET monitoring network, which falls under the administrative management of the RIVM. The measurements are processed by subtracting the natural background value from the measured value. The result is then translated into the effective radiation dose for an individual by applying the so-called Actuele Blootstelling Correctiefactor (ABC-factor). ABC-factors are closely linked with the specific use of the site where the effective radiation dose is calculated.
RIVM is tasked by the Authority for Nuclear Safety and Radiation Protection (ANVS) to annually report on whether the Borssele nuclear power plant meets the criterion stipulated in the license. Both the daily averages of the eight MONET-monitors around the Borssele nuclear power plant and an explanation of how the background level at each measuring location was determined are provided in the report. In 2015, the highest value of all monitors, after correcting for the natural background level, was 3.2 microsievert per year. An ABC-factor of 0.2 for the site boundary of Borssele NPP has been set in the permit. This translates into a maximum effective dose of 0.6 microsievert per year, following the application of the ABC-factor, and allows comparison with the value stipulated in the permit.