In 2017, the radiation level caused by gamma radiation at the site boundary of the Borssele nuclear power plant was below the maximum permitted level of 10 microsievert per year. The maximum effective dose is 1.04 microsievert. This is the result of measurements carried out by the RIVM on location. 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.
The nuclear power plant needs to ensure that the maximum effective dose received by persons outside the site boundary of Borssele NPP does not exceed 10 microsievert annually. This is stipulated in the operating license, granted in 2016 following the Dutch legislation on the use of nuclear energy. In order to determine the maximum effective dose, the gamma radiation is measured at the site boundary. The measurements are carried out. within the framework of the MONET monitoring network, which falls under the administrative management of the RIVM. The measurements are analyzed by subtracting the natural background value. The resulting measurement data are corrected with the so-called "Actuele Blootstelling Correctiefactor" (ABC-factor). An ABC-factor takes into account the specific use of the area where the gamma dose may be incurred. Around the boundary of the Borssele nuclear power plant the ABC-factor is 0,2. This translates into a maximum effective dose of 1.04 microsievert per year, which is below the maximum permitted yearly gamma dose.
From Octobre 2016, the regular network of eight monitors was inoperative due to work activities on the site. In 2017 control measurements of the radiation level were carried out continuously at four temporary locations at the site boundary. In June 2017 the regular network of eight monitors was restored. In this report the daily averages of the radiation dose recorded by the MONET-monitors around the Borssele nuclear power plant and an explanation of how the background level at each measuring location was determined are shown.