ASN Report 2022

BOURGOGNE‑FRANCHE‑COMTÉ Dijon Division ∙ Performance of three inspections aiming to track over time the actions taken by the previously inspected Departmental Councils (Doubs, Haute‑Saône, Territoire‑de‑Belfort départements): the requirements regarding the Public Health Code are duly taken into account in all the establishments concerned, especially the lower secondary schools. Difficulties in reducing the radon concentration below the thresholds are encountered in a few rare cases. ∙ Performance of four other inspections aiming to contact owners or managers of PAB in departments in which there was no obligation to measure radon before 2018 (Departmental Councils of the Côte-d’Or, Jura and Yonne départements and catholic institutions management body). These inspections showed that the initial radon measurement had been effectively carried out on the whole. ∙ Performance of an inspection in designated radon-risk workplaces in basements: the Grande Saline salt museum, a former salt production site in Salins‑les‑Bains and the well in Muyre that supplies the spa. This inspection revealed that the radon issue has been well assimilated by the town council departments that initiated the risks assessment procedure. BRETAGNE / PAYS DE LA LOIRE Nantes Division ∙ Performance of five inspections of organisations managing PAB: town councils of Nantes, Angers, Cholet and catholic educational institutions of Loire-Atlantique and Côtes-d’Armor départements and one inspection in the Mine Bleu slate mine situated in Segré-en-Anjou. These inspections show that the radon risk is duly taken into account in PAB by the large local authorities. Improvements are expected in certain private educational institutions, and more generally in the organisation put in place for continuous monitoring of management of the radon risk. GRAND EST Strasbourg and Châlons-en-Champagne Divisions ∙ After several years of awareness-raising, three inspections were performed: two inspections of PAB managers (Department Council of the Vosges with the ARS; town council of Saint‑Dié) and one inspection in a designated radon-risk workplace (Maurice Lemaire tunnel). ∙ Measurements were taken inside PAB and in the workplaces. ∙ The finding for the Vosges Departmental Council was of contrasts in the way the radon risk is taken into account, with the initial screening performed relatively late, followed by remediation measures. NORMANDIE Caen Division ∙ Performance of three inspections: - Bagnoles-de-l’Orne spas: further diagnoses are required, even though the previous ones were carried out when the spas were closed; - Departmental Council of the Manche: inspection giving highly satisfactory results for the PAB and the workers alike, diagnoses carried out in all the buildings concerned, remedial actions performed in the buildings where necessary and further diagnoses planned for this autumn; - underground quarry of Plaine de Caen: conclusion satisfactory, measurements taken in the quarry, the values are below the reference level of 300 Bq/m3. The galleries are ventilated mechanically. NOUVELLE-AQUITAINE / OCCITANIE Bordeaux Division ∙ Performance of an inspection by ASN, Dreets and the Labour Inspectorate in the Betharram Grottos as a designated radonrisk workplace. Requests for information concerning notably the assessment of the risks and the individual assessment of exposure to radon were sent to the employer. ∙ Inspection of the Regional Council of Nouvelle‑Aquitaine and of the Departmental Councils of Corrèze and HauteVienne, with the participation of the ARS and its departmental delegations, and one inspection of the Departmental Council of the Aveyron département in Occitanie. Several situations with concentrations persistently higher than the reference level threshold were identified and expert assessments of buildings must be undertaken. PROVENCE-ALPES-CÔTE D’AZUR / OCCITANIE Marseille Division ∙ Inspection of the towns of Alès and Ajaccio with the ARS Occitanie and Corse: the implementation of the radon regulations governing PAB is broadly satisfactory. ∙ Inspection of a wine estate in the Var département with infrastructures situated 20 metres underground governed by the regulations for designated radon-risk workplaces. The enterprise was unaware of the regulations relative to radon. ∙ Contact made with the Interregional Directorates of the Penitentiary Services (DISP) South-East – Marseille and South – Toulouse with the ARS of the Occitanie and PACA regions. As these are PAB managers overseen by the ASN regional divisions, the measuring campaigns in the establishments concerned are duly carried out in the majority of cases, but further efforts must be made in displaying information, periodic monitoring and management of threshold exceedances when expert assessments and works are necessary. With regard to management of the occupational risk however, the regulations are rarely applied. With regard to the oversight by the ASN divisions in certain designated radon-risk workplaces under the Labour Code (spas, tunnels, etc.), the results are fairly contrasted. If some employers of these workplaces have assessed the radon risk and taken the regulatory measures required in cases where the reference level is exceeded, others have taken no action whatsoever, in the majority of cases due to ignorance of the risk and of the regulations. The radiation protection inspections carried out in 2022 in medical or industrial facilities situated in municipalities with significant radon potential were moreover used by some ASN divisions as an opportunity to explain the regulatory obligations of employers in workplaces. The information sheet published by ASN Prevention of the radon risk in the workplace is given to the employers on this occasion. In this respect, as in the preceding years, ASN found that radon is increasingly taken into account in the assessment of risks for workers. The regional divisions moreover contributed to the inspection of organisations approved for taking radon measurements in PAB (14 inspections). * Regional directorate for environment, planning and housing. ** Regional directorate for the economy, employment, labour and solidarity. ASN Report on the state of nuclear safety and radiation protection in France in 2022 117 • 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