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Gammastralingsniveaumetingen aan de terreingrens van COVRA N.V. te Borsele in 2023 met het MONET-meetnet
Series / Report no.
RIVM rapport 2024-0122
Open Access
Type
Report
Language
nl
Date
2024-12-17
Research Projects
Organizational Units
Journal Issue
Title
Gammastralingsniveaumetingen aan de terreingrens van COVRA N.V. te Borsele in 2023 met het MONET-meetnet
Translated Title
Gamma radiation dose measured at the site of COVRA N.V. at Borsele with the MONET network in 2023
Published in
Abstract
Het RIVM meet elk jaar het niveau van gammastraling aan de terreingrens van de Centrale Organisatie Voor Radioactief Afval (COVRA(Centrale Organisatie Voor Radioactief Afval) N.V.) in Borsele. Dit niveau was in 2023 lager dan het maximum van 40 microsievert per jaar waarvoor de vergunning is verleend. De hoogste gemeten dosis blijkt 3,1 microsievert. Hiermee voldoet COVRA aan de eis uit de vergunning. Het RIVM rapporteert en toetst de gammastraling aan de terreingrens elk jaar in opdracht van de Autoriteit Nucleaire Veiligheid en Stralingsbescherming (ANVS).
COVRA moet ervoor zorgen dat mensen buiten de terreingrens aan een zo laag als redelijkerwijs mogelijke dosis worden blootgesteld, onder het maximum van 40 microsievert. Dat is in de kernenergiewetvergunning vastgelegd.
Om de effectieve dosis te bepalen wordt het gammastralingsniveau op twaalf locaties langs de terreingrens gemeten. Het RIVM doet deze metingen met het zogenoemde MONET-meetnet. Daarna wordt van de metingen de hoeveelheid gammastraling afgetrokken die van nature voorkomt (natuurlijke achtergrondwaarde).
Ten slotte wordt de meetwaarde gecorrigeerd met de zogeheten Actuele Blootstellings Correctiefactor (ABC-factor). Een ABC-factor hangt samen met de bestemming van het gebied waar mensen kunnen blootstaan aan de stralingsdosis.
In dit rapport staan de daggemiddelden van de metingen van de twaalf MONET-monitoren aan de terreingrens van COVRA in 2023. Ook wordt uitgelegd hoe voor elk meetpunt de natuurlijke achtergrondwaarde is bepaald.
Each year, the National Institute for Public Health and the Environment (RIVM) measures the gamma radiation dose at the site boundary of the Central Organisation For Radioactive Waste (Centrale Organisatie Voor Radioactief Afval, COVRA) in Borsele. In 2023, this dose was below the maximum of 40 microsievert per year specified in the station’s operating licence. The highest measured dose was 3.1 μSv. This means COVRA meets the relevant criterion in its operating licence. RIVM is tasked by the Authority for Nuclear Safety and Radiation Protection (Autoriteit Nucleaire Veiligheid en Stralingsbescherming, ANVS) to monitor the gamma radiation at the site boundary and report on this annually. COVRA has a duty to ensure that the exposure to radiation of people outside the site boundary is as low as reasonably achievable, below the maximum of 40 microsievert per year. This is pursuant to its operating licence under the Nuclear Energy Act. To determine the effective dose, the gamma radiation dose is measured in 12 locations along the site boundary. RIVM conducts these measurements through the MONET monitoring network. The measurements are analysed by subtracting the dose of gamma radiation that occurs naturally (natural background value). Lastly, the measurement value is corrected using the Actuele Blootstelling Correctiefactor (or ABC factor, meaning actual exposure correction factor). An ABC factor takes into account the specific use of the area where people may be exposed to the radiation dose. This report provides the daily averages of the radiation dose recorded by the 12 MONET monitors at the boundary of the COVRA site in 2023, and explains how the background level in each measuring location was determined.
Each year, the National Institute for Public Health and the Environment (RIVM) measures the gamma radiation dose at the site boundary of the Central Organisation For Radioactive Waste (Centrale Organisatie Voor Radioactief Afval, COVRA) in Borsele. In 2023, this dose was below the maximum of 40 microsievert per year specified in the station’s operating licence. The highest measured dose was 3.1 μSv. This means COVRA meets the relevant criterion in its operating licence. RIVM is tasked by the Authority for Nuclear Safety and Radiation Protection (Autoriteit Nucleaire Veiligheid en Stralingsbescherming, ANVS) to monitor the gamma radiation at the site boundary and report on this annually. COVRA has a duty to ensure that the exposure to radiation of people outside the site boundary is as low as reasonably achievable, below the maximum of 40 microsievert per year. This is pursuant to its operating licence under the Nuclear Energy Act. To determine the effective dose, the gamma radiation dose is measured in 12 locations along the site boundary. RIVM conducts these measurements through the MONET monitoring network. The measurements are analysed by subtracting the dose of gamma radiation that occurs naturally (natural background value). Lastly, the measurement value is corrected using the Actuele Blootstelling Correctiefactor (or ABC factor, meaning actual exposure correction factor). An ABC factor takes into account the specific use of the area where people may be exposed to the radiation dose. This report provides the daily averages of the radiation dose recorded by the 12 MONET monitors at the boundary of the COVRA site in 2023, and explains how the background level in each measuring location was determined.
Description
Publisher
Rijksinstituut voor Volksgezondheid en Milieu RIVM