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1. ASSESSMENT BY DOMAIN
1.1 The nuclear installations
Blayais nuclear power plant
ASNconsiders that the nuclear safety, radiation protection
and environmental protection performance of the
Blayais NPP is, on the whole, in line with its general
assessment of EDF’s performance.
ASN has noted the smooth running of the four reactor
outages for maintenance and refuelling. Although the
ten-year outages of reactors 3 and 4 ran concomitantly
and the site had occasional problems with procuring
various supplies, this situation had no notable effects on
the safety of the facilities. In this respect, the regulatory
inspections performed by ASN on the main primary
system of reactors 3 and 4 and on the main secondary
systems of reactor 3 revealed no particular malfunctions
of these systems.
However, as in 2014, ASNnoted that the site experienced
some difficulties in maintenance. The efforts must be
maintainedwith regard towork preparation, particularly
by ensuring as amatter of course that experience feedback
from similar operations is taken into account.
On the other hand, with regard to radiationprotection, ASN
notes that the site must improve the control of radiation
protection on the worksites conducted during the reactor
shutdowns. Several significant radiation protection events
particularly noteworthy were thus notified during the
shutdowns, one concerning an operator who received
a dose exceeding a regulatory limit when working on a
heat exchanger of the chemical and volumetric control
system of the primary system of reactor 4.
With regard to environmental protection, ASNnotes the
efforts made by the site to limit cooling fluid discharges.
Civaux nuclear power plant
ASN considers that the nuclear safety and environmental
protection performance of the Civaux site is on the whole
in line with ASN’s general assessment of EDF and that
the site’s radiation protection performance stands out
positively with respect to the said general assessment.
The scheduled outage for partial inspection of reactor 2
went well on the whole. It was marked in particular by
the performance of themain secondary systemhydraulic
test. ASN considers that the licensee must continue the
efforts undertaken since 2014 regarding rigour in the
preparation, performance and inspection of certain
operating and maintenance activities.
BORDEAUX DIVISION
ASN inspection at the Civaux NPP, June 2015.
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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