236 / 536
In view of the time frames announced by EDF for reactor
commissioning, ASN considers that EDF must remain
vigilant with regard to the preservation of the equipment
already installed, taking into account the worksite
conditions and the ongoing concomitant activities.
ASN examined the organisation put in place by the teams
responsible for future operation of the Flamanville 3
reactor, particularly for the production of the operating
documentation, preparation for arrival of the nuclear
fuel on the site and consideration of organisational and
human factors. ASN considers that the organisation
implemented by EDF in these areas is satisfactory.
ASN fulfils the labour inspectionduties on the Flamanville 3
construction site. In 2015 the inspectors continued to
check that the outside contractors working on the site
compliedwith the provisions concerning the safety rules
implemented; they drew attention in particular to the
impact of the startup tests, which involve powering up
systems or putting equipment under pressure.
Andra’s Manche repository
ASN considers that the condition and the operation of
the Manche repository facilities are basically satisfactory.
Andra must continue to reinforce the stability of the
repository’s cover and continue its efforts to eliminate
water infiltrations at the edge of the membrane intended
to ensure the water-tightness of the storage volume.
In accordance with the commitment made during the
last periodic safety review, Andra sent ASN an interim
review of the work carried out on the repository cover.
Lastly, Andra sent ASN a revision of the repository’s
on-site emergency plan.
ASN considers that Andra’s continuing measurement
of tritium using the methods of the study that began
in 2012 should lead to a better understanding of the
hydrogeological mechanisms involved.
As concerns the maintaining of the repository memory,
Andra must continue its work to prioritise the detailed
data with a view to proposing a new version of the
synthesis by 2016.
Ganil (National Large Heavy Ion Accelerator)
ASN considers that the Ganil licensee continues on
the whole to satisfactorily ensure the construction
work of phase 1 of the Spiral 2 installation, for which
the authorisation decree was published in 2012. The
way in which worksite monitoring is organised seems
well-founded and functional. During its inspections in
2015, ASN nevertheless detected shortcomings in the
performance of the tests relating to safety, whichwill have
to be supplemented. ASNconsiders that the licenseemust
improve its organisation for themanagement of low- and
very low-level radioactive waste produced on the site.
ASN continued its examination of the commissioning
application for phase 1 of the Spiral 2 project.
ASNcompleted the examination of the first periodic safety
review of the installation since it was commissioned in
1983. On completion of this process, ASN set technical
prescriptions that supplement the licensee’s commitments
to bring the installation into compliance with its baseline
requirements and the regulations in effect.
The Brennilis nuclear power plant undergoing
decommissioning
ASN considers that the conditions of safety for
continuation of the partial decommissioning activities
on theMonts d’Arrée site have proved to be sub-standard.
On 23rd September 2015, a fire broke out on the heat
exchanger decommissioning worksite, which was in the
final phase of clean-up at the time, resulting in activation
on the on-site emergency plan. The heat exchanger and
the effluent treatment plant decommissioning worksites
have both been suspended since then. ASNnotes that the
prior analyses and the way the fire risk for these activity
phaseswas specifically taken into accountwere insufficient.
ASN has asked EDF to undertake all the actions to review
all the organisational and humanmeasures implemented
to control the risks associated with hot work on the
decommissioning worksites as soon as possible.
The effluent treatment plant post-operational clean-
out and demolition worksite was interrupted several
times, notably after the fall of a rubble-sorting machine.
In addition to this, ASN verified compliance with the
commitments made by EDF at the end of the inspection
carried out in 2014 concerning the management of the
excavations area and compliance with the conditions
associated with management of contaminated water
on the site.
ASN has received the management plan for the land on
which the former effluent treatment station is situated
and has asked EDF to submit a new file with a view to
complete decommissioning of the installation.
1.2 Radiation protection
in the medical field
Radiotherapy
In 2015, ASN continued the two-year inspection cycle
covering all the radiotherapy departments in Normandy;
an annual inspection is maintained for the departments
with identified points requiring particular vigilance. The
inspections conducted in 2015 revealed the maintaining
of a real process to improve the rigour, organisation and
traceability of interventions and the implementation of
management systems to ensure the quality and safety
of treatments. Nevertheless, in spite of the increased
staffing in the majority of the radiotherapy centres, a
small number of the centres in Normandy still suffer
CAEN DIVISION
236
CHAPTER 08 :
REGIONAL OVERVIEW OF NUCLEAR SAFETY AND RADIATION PROTECTION
ASN report on the state of nuclear safety and radiation protection in France in 2015