TABLE Example of radiological monitoring of the environment around BNIs ENVIRONMENT MONITORED OR TYPE OF CONTROL CATTENOM NPP (ASN RESOLUTION 2014-DC-0415 OF 16 JANUARY 2014) ORANO PLANT AT LA HAGUE (AMENDED ASN RESOLUTION 2015-DC-0535 OF 22 DECEMBER 2015) Air at ground level • 4 stations continuously sampling atmospheric dust on a fixed filter with daily measurements of total β activity (βG): ‒ γ spectrometry if βG > 2 mBq/m3 ‒ Monthly γ spectrometry on groups of filters per station • 1 continuous sampling station downwind of the prevailing winds, with weekly measurement of atmospheric 3H • 5 stations continuously sampling atmospheric dust on a fixed filter, with daily measurements of the total α activity (αG) and total β activity (βG): ‒ γ spectrometry if αG or βG > 1 mBq/m3 ‒ Monthly α (Pu) spectrometry on grouped filters per station • 5 continuous sampling stations for halogens on specific adsorbent with weekly γ spectrometry to measure different kinds of iodine • 5 continuous sampling stations with weekly measurement of atmospheric 3H • 5 continuous sampling stations with bi-monthly measurement of atmospheric 14C • 5 continuous measurement stations for 85Kr activity in the air Ambient γ radiation • Continuous measurement with recording: ‒ 4 detectors at 1 km ‒ 10 detectors on the site boundary ‒ 4 detectors at 5 km • 5 detectors with continuous measurement and recording • 11 detectors with continuous measurement at the site fencing Rain • 1 continuous sampling station under the prevailing winds with bi-monthly measurement of βG and 3H • 2 continuous sampling stations including one under the prevailing winds with weekly measurement of αG, βG and 3H ‒ γ spectrometry if significant αG or βG Receiving environment for liquid discharge • Sampling from the river upstream of the discharge point and in the good mixing area for each discharge ‒ Measurement of βG, potassium (K)* and 3H • Continuous sampling in the river at the good mixing point ‒ 3H measurement (average daily mixture) • Annual sampling in aquatic sediments, fauna and flora upstream and downstream of the discharge point with γ spectrometry, free 3H measurement and, on fish, organically bound 14C and 3H • Periodic sampling from a stream and in the dam adjoining the site with measurements of βG, K, 3H • Daily seawater samples from 2 points on the coast, with daily measurements (γ spectrometry, 3H) at one of these points and for each of the 2 points, α and γ spectrometry and βG, K, 3H and 90Sr measurements • Quarterly seawater samples at 3 points offshore with γ spectrometry and βG, K, 3H measurements • Quarterly samples of beach sand, seaweed and limpets at 13 points with γ spectrometry + 14C measurements and α spectrometry for the seaweed and limpets at 6 points • Sampling of fish, crustaceans, shellfish and molluscs in 3 coastal zones of the Cotentin with α and γ spectrometry and 14C measurement • Quarterly sampling of offshore marine sediments at 8 points with α and γ spectrometry and 90Sr measurement • Weekly to six-monthly samples of water from 19 streams around the site, with αG, βG, K and 3H measurements • Quarterly sampling of sediments from the 4 main streams adjacent to the site, with γ and α spectrometry • Quarterly samples of aquatic plants in 3 streams in the vicinity of the site with γ spectrometry and 3H measurement Groundwaters • Monthly sampling at 4 points, bi-monthly at 1 point and quarterly at 4 points with βg, K and 3H measurement • 5 sampling points (monthly check) with αG, βG, K and 3H measurement Water for consumption • Annual sampling of water intended for human consumption, with βG, K and 3H measurements • Periodic sampling of water intended for human consumption at 15 points, with αG, βG, K and 3H measurements Soil • 1 annual sample of the topsoil with γ spectrometry • Quarterly samples at 7 points with γ spectrometry and 14C measurement Vegetation • 2 grass sampling points, including one under the prevailing winds, monthly γ spectrometry and quarterly 14C and C measurements • Annual campaign for the main agricultural crops, with γ spectrometry, 3H and 14C measurements • Monthly grass sampling at 5 points and quarterly at 5 other points with γ spectrometry and 3H and 14C measurements, ‒ Annual α spectrometry at each point • Annual campaign for the main agricultural crops, with α and γ spectrometry, 3H, 14C and 90Sr measurements Milk • 2 sampling points situated at 0 to 10 km from the installation, including one under the prevailing winds, with monthly γ spectrometry, quarterly 14C measurement and annual 90Sr and 3H measurement • 5 sampling points (monthly check) with γ spectrometry, K, 3H, 14C and 90Sr measurement αG = α total ; βG = β total * Measurements of total concentration of potassium by spectrometry for 40K. 7 162 ASN Report on the state of nuclear safety and radiation protection in France in 2023 • 03 • Regulation of nuclear activities and exposure to ionising radiation
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