ASN Report 2018

T he Nantes division regulates radiation protection and the transport of radioactive substances in the 4 départements of the Bretagne region. The Caen division regulates the nuclear safety of the Monts d’Arrée NPP (Brennilis), currently undergoing decommissioning. Bretagne region In 2018, ASN carried out 49 inspections, comprising 2 inspections in the Monts d’Arrée NPP undergoing decommissioning and 47 in small-scale nuclear activities including 2 relating to the transport of radioactive substances. Among the 37 significant events reported and analysed to draw lessons from them, 12 events concerned radiotherapy patients and 6 of these were rated level 1 on the ASN- SFRO scale and 1 was rated level 2. One event concerning a brachytherapy patient was rated level 2 on the ASN‑SFRO scale. ASN drew up two violation reports in the exercise of its oversight duties. The Brennilis NPP The Brennilis NPP is situated in the Finistère département , on the Monts d’Arrée site 55 kmnorth of Quimper. Baptised EL4-D, this installation (BNI 162) was an industrial electricity production prototype (70 MWe) moderated with heavy water and cooled with carbon dioxide, and it was definitively shut down in 1985. The Decree of 27 July 2011 authorized part of the decommissioning operations, with the exception of decommissioning of the reactor block. The Decree of 16 November 2016 extended the time frame for the decommissioning operations, particularly those concerning: •  decommissioning of the heat exchangers; •  clean-out and demolition of the effluent treatment station. These operations were to be completed before 28 July 2018. REGIONAL OVERVIEWOF NUCLEAR SAFETY AND RADIATION PROTECTION THE INSTALLATIONS AND ACTIVITIES TO REGULATE COMPRISE: ཛྷ ཛྷ the Monts d’Arrée NPP, undergoing decommissioning; ཛྷ ཛྷ small-scale nuclear activities in the medical sector: ݸݸ 8 external-beam radiotherapy departments; ݸݸ 5 brachytherapy departments; ݸݸ 11 nuclear medicine departments; ݸݸ 37 centres performing fluoroscopy-guided interventional procedures; ݸݸ 54 computed tomography scanners; ݸݸ some 2,500 medical and dental radiology devices; ཛྷ ཛྷ small-scale nuclear activities in the veterinary, industrial and research sectors: ݸݸ 1 cyclotron; ݸݸ 20 industrial radiography companies; ݸݸ about 450 licences for industrial and research equipment, including 325 users of devices to detect lead in paint; ཛྷ ཛྷ activities linked to the transport of radioactive substances; ཛྷ ཛྷ approved laboratories and organisations: 6 ݸݸ radiation protection technical control agencies; 7 ݸݸ radon screening agencies; 4 ݸݸ head offices of laboratories approved for taking environmental radioactivity measurements. see p. 200 see p. 230 see p. 256 ASN report on the state of nuclear safety and radiation protection in France in 2018  39