Abstracts ASN Report 2019

monitoring after cancer treatment and coronary diseases. It has been regularly reviewed by IRSN since 2002. The average effective dose per inhabitant resulting from diagnostic radiological examinations has been evaluated at ӄєӉׇŀ ʼn ĹłŅ ŇĻĸ ŌĸĴŅ ӅӃӄӅׇҎ ŅĸŃłŅŇ ӅӃӄӇҏ ĹłŅ ņłŀĸ ӋӄєӋׇŀļĿĿļłŁ ķļĴ壳ņŇļĶ ŃŅłĶĸķňŅĸņ ŃĸŅĹłŅŀĸķ ҎӊӇєӉׇŀļĿĿļłŁ ļŁ ӅӃӃӊҏё ļєĸє ӄёӅӇӊׇŃŅłĶĸķňŅĸņ ĹłŅ ӄёӃӃӃׇļŁĻĴĵļŇĴŁŇņ ŃĸŅ ŌĸĴŅє Ň ļņ Ňł ĵĸ ŁłŇĸķ ŇĻĴŇ ŇĻĸ ļŁķļʼnļķňĴĿ ĸŋŃłņňŅĸ ļŁ ӅӃӄӅׇļņ ʼnĸŅŌ ʼnĴŅļĸķє Ļňņё ĴĿŇĻłňĺĻ ĴĵłňŇ łŁĸ ŇĻļŅķ łĹ ŇĻĸ ŅĸŁĶĻ ŃłŃňĿĴŇļłŁ ňŁķĸŅŊĸŁŇ ĴŇ ĿĸĴņŇ łŁĸ ŃŅłĶĸķňŅĸ ҎĸŋĶĿňķļŁĺ ķĸŁŇĴĿ ŃŅłĶĸķňŅĸņҏё ӋӈՌ łĹ ŇĻĴŇ ŃłŃňĿĴŇļłŁ was either not exposed or received doses of less than 1 mSv. The average individual effective dose increased by 23% between ӅӃӃӊׇĴŁķ ӅӃӄӅׇҎļŇ ŊĴņ ӄєӆ ŀ ʼn ļŁ ӅӃӃӊҏє Conventional radiology (54%), computed tomography (10.5%) and dental radiology (34%) account for the largest number of procedures. It is the contribution of computed tomography to the effective collective dose that remains preponderant and more ņļĺŁļĹļĶĴŁŇ ļŁ ӅӃӄӅׇҎӊӄՌҏ ŇĻĴŁ ļŁ ӅӃӃӊׇҎӈӋՌҏё ŊĻĸŅĸĴņ ŇĻĴŇ łĹ ķĸŁŇĴĿ radiology remains very low (0.2%). In adolescents, conventional radiology and dental procedures ĴŅĸ ŇĻĸ ŀłņŇ ŁňŀĸŅłňņ ҎӄёӃӅӃׇĴŁķ ӄёӅӅӃׇŃŅłĶĸķňŅĸņ ŅĸņŃĸĶŇļʼnĸĿŌ ĹłŅ ӄёӃӃӃׇļŁķļʼnļķňĴĿņ ļŁ ӅӃӄӅҏє ĸņŃļŇĸ ŇĻĸļŅ ĹŅĸńňĸŁĶŌ ļŁ ŇĻļņ population, dental radiology procedures represent only 0.5% of the collective dose. Lastly, it is noteworthy that: Ҋ Ł Ĵ ņĴŀŃĿĸ łĹ ĴĵłňŇ ӉӃӃёӃӃӃׇŃĸŅņłŁņ ĶłʼnĸŅĸķ ĵŌ ĻĸĴĿŇĻ insurance, the analysis of the effective doses for these people who effectively underwent an examination shows that 70% of ŇĻĸŀ ŅĸĶĸļʼnĸķ Ŀĸņņ ŇĻĴŁ ӄ ŀ ʼnё ӄӋՌ ŅĸĶĸļʼnĸķ ĵĸŇŊĸĸŁ ӄׇĴŁķ ӄӃ ŀ ʼnё ӄӄՌ ĵĸŇŊĸĸŁ ӄӃׇĴŁķ ӈӃ ŀ ʼn ĴŁķ ӄՌ ŀłŅĸ ŇĻĴŁ ӈӃ ŀ ʼnє Ҋ Ĵņĸķ łŁ Ĵ ņĴŀŃĿĸ łĹ ӄӅӃёӃӃӃׇĶĻļĿķŅĸŁ ĵłŅŁ ĵĸŇŊĸĸŁ ӅӃӃӃׇĴŁķ ӅӃӄӈё ŅĸŃłŅŇņ ҎӅӃӄӈׇŅĸŃłŅŇҏ ŇĻĴŇ ļŁ ӅӃӄӈё ӆӄєӆՌ łĹ ŇĻĸ children in the sample were exposed to ionising radiation for diagnostic purposes (up by 2% compared with 2010). The ĴʼnĸŅĴĺĸ ĸĹĹĸĶŇļʼnĸ ķłņĸ ļņ ĸņŇļŀĴŇĸķ ĴŇ ӃєӇӆׇŀ ʼn ĴŁķ ŇĻĸ ŀĸķļĴŁ ĴŇ ӃєӃӅׇŀ ʼn ҎķłŊŁ ĹłŅ ŇĻĸ ĴʼnĸŅĴĺĸ ĵňŇ ĸńňļʼnĴĿĸŁŇ ĹłŅ ŇĻĸ ŀĸķļĴŁ ʼnĴĿňĸҏє ĿĴŅĺĸ ĴĺĸіŅĸĿĴŇĸķ ķļņŃĴŅļŇŌ ļņ ŁłŇĸķѓ ĵĸĿłŊ ӄׇŌĸĴŅ łĹ Ĵĺĸ ŇĻĸ ŀĸķļĴŁ ʼnĴĿňĸ ļņ Ӄєӈӈׇŀ ʼn ҎĻļĺĻĸņŇ ʼnĴĿňĸҏ ĴŁķ ĵĸŇŊĸĸŁ ӉіӄӃׇŌĸĴŅņё ŇĻĸ ŀĸķļĴŁ ʼnĴĿňĸ ĸńňĴĿņ ӃєӃӄӅׇŀ ʼn ҎĿłŊĸņŇ ŀĸķļĴŁ value). The substantial uncertainties in these studies with regard to the average effective dose values per type of procedure must nevertheless be taken into account, which justifies the need for progress in estimating doses in the next exposure study of the general population. Particular attention is required in order to control and reduce the doses linked to medical imaging, more specifically when alternative techniques can be used for a same given indication, because the multiplication of the most heavily irradiating examinations for the same person could lead to a final effective dose value of several tens of millisieverts; at this level of exposure, certain epidemiological surveys have revealed the occurrence of radiation-induced cancers. Controlling the doses of ionising radiation delivered to persons during a medical examination remains a priority for ASN. ׇņĸĶłŁķ ŃĿĴŁ łĹ ĴĶŇļłŁ ŊĴņ ŃňĵĿļņĻĸķ ļŁ ňĿŌ ӅӃӄӋє Ļļņ ŃĿĴŁ extends the first one (2011-2017), drawn up in collaboration with the stakeholders (institutional and professional). A new IRSN assessment of how doses delivered to patients are evolving is expected in 2020. ב ِ ג 0ɴȵȒɀɖȸƺ Ȓǔ ȇȒȇ ٮ ǝɖȅƏȇ ɀȵƺƬǣƺɀ ٢ƏȇǣȅƏǼ ƏȇƳ ȵǼƏȇɎ ɀȵƺƬǣƺɀ٣ The international radiation protection system was created to protect humans against the effects of ionising radiation. Environmental radioactivity is thus assessed with respect to its impact on human beings and, in the absence of any evidence to the contrary, it is today considered that the current standards guarantee the protection of other species. Protection of the environment against the radiological risk and more specifically the protection of non-human species, must however be guaranteed independently of the effects on humans. Pointing out that this objective is already incorporated in the national legislation, ASN will ensure that the impact of ionising radiation on non-human species is effectively included in the regulations and in the authorisations for nuclear activities as soon as evaluation methods are available. On the basis of the IRSN appraisal report, the Advisory Committee for Radiation Protection in Industrial and Research Applications of Ionising Radiation and for the Environment (GPRADE) adopted an opinion in September 2015. The draft guide is to be submitted to ASN in the first quarter of 2020. (X J« x ژב Distribution of radon activity concentrations ƫɵ Ɏɵȵƺ Ȓǔ ƫɖǣǼƳǣȇǕ Ȓȵƺȇ ɎȒ Ɏǝƺ ȵɖƫǼǣƬ ɀƬȸƺƺȇƺƳ ٢ǣȇ ۏ ٣ً א ׎׏ ז ٖ א ׎׏ ژח ƬƏȅȵƏǣǕȇ 0 20 40 60 80 100 Healthcare and social institutions Educational institutions Number of institution screened < 400 Bq/m ء between 400 and 1,000 Bq/m ء > 1,000 Bq/m ء 64.1 82.0 28.6 7.3 2.7 15.3 ASN Report on the state of nuclear safety and radiation protection in France in 2019 111 ׎׏ ٲ NUCLEAR ACTIVITIES: IONISING RADIATION AND HEALTH AND ENVIRONMENTAL RISKS 01