ASN Report 2017

149 ASN report on the state of nuclear safety and radiation protection in France in 2017 Chapter 04  - Regulation of nuclear activities and exposure to ionising radiation of 2011. The second issue, published at the end of 2015, corresponds to the period 2011-2014. The third issue is scheduled for publication at the end of 2018. In addition to this report, IRSN also produces regional radiological findings to provide more precise information about a given area. 4.3 Measurement quality Articles R.1333-11 and R.1333-11-1 of the Public Health Code require the creation of a National Monitoring Network (RNM) and a procedure to have the radioactivity measurement laboratories approved by ASN. The RNM working methods are defined by the above-mentioned ASN resolution of 29th April 2008 amended. ENVIRONMENT MONITORED OR TYPE OF INSPECTION CATTENOM NPP (RESOLUTION 2014-DC-0415 OF 16TH JANUARY 2014) AREVA PLANT AT LA HAGUE (ASN RESOLUTION 2015-DC-0535 OF 22TH DECEMBER 2015) Air at ground level • 4 stations continuously sampling atmospheric dust on a fixed filter, with daily measurements of the total β activity ( β G ) γ spectrometry if β G > 2 mBq/m 3 Monthly γ spectrometry on grouped filters per station • 1 continuous sampling station downwind of the prevailing winds, with weekly measurement of atmospheric 3 H • 5 stations continuously sampling atmospheric dust on a fixed filter, with daily measurements of the total α activity ( α G ) and total β activity ( β G ). γ spectrometry if α G or β G > 1 mBq/m 3 Monthly α (Pu) spectrometry on grouped filters per station • 5 continuous sampling stations for halogens on specific adsorbent with weekly γ spectrometry to measure iodines • 5 continuous sampling stations with weekly measurement of atmospheric 3 H • 5 continuous sampling stations with bi-monthly measurement of atmospheric 14 C • 5 continuous measurement stations for 85 Kr 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 β G and 3 H • 2 continuous sampling stations including one under the prevailing winds with weekly measurement of α G , β G and 3 H. γ spectrometry if significant α G or β G Liquid discharge receiving • Sampling from the river upstream of the discharge point and in the good mixing area for each discharge Measurement of β G , potassium (K)* and 3 H • Continuous sampling in the river at the good mixing point 3 H measurement (average daily mixture) • Annual sampling in aquatic sediments, fauna and flora upstream and downstream of the discharge point with γ spectrometry, free 3 H measurement, and, on fish, organically bound 14 C and 3 H • Periodic sampling from a stream and in the dam adjoining the site with measurements of β G , K, 3 H • Daily seawater samples from 2 points on the coast, with daily measurements ( γ spectrometry, 3 H) at one of these points and for each of the 2 points, α and γ spectrometry and β G , K, 3 H and 90 Sr measurements • Quarterly seawater samples at 3 points offshore with γ spectrometry and β G , K, 3 H measurements • Quarterly samples of beach sand, seaweed and limpets at 13 points with γ spectrometry + 14 C 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 14 C measurement • Quarterly sampling of offshore marine sediments at 8 points with α and γ spectrometry and 90 Sr measurement • Weekly to six-monthly samples of water from 19 streams around the site, with α G , β G , K and 3 H 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 3 H measurement Groundwater • Monthly sampling at 4 points, bi-monthly at 1 point and quarterly at 4 points with β g , K and 3 H measurement • 5 sampling points (monthly check) with α G , β G , K and 3 H measurement Water for consumption • Annual sampling of water intended for human consumption, with β g , K and 3 H measurements • Periodic sampling of water intended for human consumption at 15 points, with α G , β G , K and 3 H measurements Soil • 1 annual sample of topsoil with γ spectrometry • Quarterly samples at 7 points with γ spectrometry and 14 C measurement Vegetation • 2 grass sampling points, including one under the prevailing winds, monthly γ spectrometry and quarterly 14 C and C measurements • Annual campaign for the main agricultural crops, with γ spectrometry, 3 H and 14 C measurements • Monthly grass sampling at 5 points and quarterly at 5 other points with γ spectrometry and 3 H and 14 C measurements, • Annual campaign for the main agricultural crops, with α and γ spectrometry, 3 H, 14 C and 90 Sr measurements Milk • 2 sampling points, situated 0 to 10 km from the facility, including one under the prevailing winds, with monthly γ spectrometry, quarterly 14 C measurement and annual 90 Sr and 3 H measurement • 5 sampling points (monthly check) with γ spectrometry, K, 3 H, 14 C and 20 Sr measurement TABLE 8: Example of radiological monitoring of the environment around BNIs α G = α total; β G = β total * Measurements of total concentration of potassium and by spectrometry for 40 K.