due to industrial process deposits (scale forming in piping for example). In 2021, the individual monitoring of worker exposure in industrial activities leading to exposure to substances of natural origin or to radon of geological origin (exposure to natural radionuclides of the uranium and thorium decay chains) involved about 440 workers monitored for external exposure (including 1 worker exposed to more than 1 mSv) and 339 workers monitored for internal exposure (of whom 19 were exposed to more than 1 mSv). Flight crew exposure to cosmic radiation Airline flight crews and certain frequent flyers are exposed to significant doses owing to the altitude and the intensity of cosmic radiation at high altitude. These doses can exceed 1 mSv/year. Since 1 July 2014, IRSN calculates the individual doses for civil flight personnel using the SievertPN application, on the basis of the flight and personnel presence data provided by the airlines. These data are subsequently transmitted to Siseri, the French national worker dosimetry registry. DIAGRAM Changes in the number of monitored workers whose annual dose exceeds 20 mSv, from 1996 to 2021 2 0 100 200 300 400 500 600 700 800 900 1,000 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 905 340 322 177 69 112 79 100 51 40 26 22 16 14 14 8 8 9 8 2 1 2 10 5 Source: IRSN. Details for the 2009-2021 period 5 1 0 3 6 9 12 15 2018 2019 2017 2016 2015 2014 2013 2012 2011 2010 2009 2021 2020 RESULTS OF DOSIMETRY MONITORING OF WORKER EXTERNAL EXPOSURE TO IONISING RADIATION (EXPOSURE TO NATURAL RADIOACTIVITY INCLUDED) IN 2021 (Source: Worker radiation protection: occupational exposure to ionising radiation in France, IRSN 2021 report, June 2022) ■ Total population monitored: 392,180 workers ■ Monitored population for whom the annual effective dose remained below the detection threshold: 294,816 workers, i.e. more than 75% ■ Monitored population for whom the annual effective dose remained between the detection threshold and 1 mSv: 72,944 workers, i.e. about 18% ■ Monitored population for whom the annual effective dose remained between 1 mSv and 20 mSv: 24,419 workers, i.e. more than 6% of the total population monitored ■ Monitored population for whom the annual effective dose exceeded 20 mSv: 1 worker(*) ■ Monitored population for whom the equivalent dose to the extremities exceeded 500 mSv: no workers ■ Monitored population for whom the equivalent dose to the skin exceeded 500 mSv: 1 worker ■ Monitored population for whom the equivalent dose to the lens of the eye exceeded 50 mSv: 1 worker ■ Collective dose (sum of the individual effective annual doses): 82.71 man-Sv ■ Average annual individual effective dose in the population which recorded a dose higher than the detection threshold: 0.85 mSv Results of internal exposure monitoring in 2021 (natural radioactivity excluded) ■ Number of routine examinations carried out: 232,140 (of which 0.4% were considered positive) ■ Population for which a dose estimation was made: 531 workers ■ Number of special monitoring examinations or verifications performed: 9,450 (of which 12% are higher than the detection threshold) ■ Population having recorded a committed effective dose exceeding 1 mSv: 3 workers Results of monitoring of internal exposure to natural radionuclides from the uranium and thorium decay chains in 2021 ■ Internal exposure: • collective dose for 339 workers: 85.03 man-mSv • average annual individual effective dose in the population which recorded a dose higher than the detection threshold: 0.39 mSv * This case was retained by default, as the occupational physician gave no feedback on the conclusions of the investigation. ASN Report on the state of nuclear safety and radiation protection in France in 2022 109 • 01 • Nuclear activities: ionising radiation and health and environmental risks 07 08 13 AP 04 10 06 12 14 03 09 05 11 02 01
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