145 / 536
ASN and IRSN subsequently examine the operating
feedback from the events. The assessment by ASN, the
significant event reports and the periodic reviews sent by
the licensees constitute the basis of operating experience
feedback. This experience feedback can lead to requests
for improvement of the condition of the facilities and the
organisation adoptedby the licensee, aswell as for changes
to the regulations.
Operating experience feedbackcomprises the eventswhich
occur inFrance andabroad if it is pertinent to take theminto
account inorder to reinforce safety or radiationprotection.
3.3.3 Technical inquiries held in the event of
an incident or accident concerning a nuclear activity
ASNhas the authority to carry out an immediate technical
inquiry in the event of an incident or accident in a nuclear
activity. This inquiry consists in collecting and analysing
all useful information, without prejudice to any judicial
inquiry, in order to determine the circumstances and the
identified or possible causes of the event, and draw up
the appropriate recommendations if necessary. Articles
L. 592-35 and following of the Environment Code give
ASNpowers to set up a commission of inquiry, determine
its composition (ASNstaff andpeople fromoutside ASN),
define the subject and scope of the investigations and
gain access to all necessary elements in the event of a
judicial inquiry.
Decree 2007-1572 of 6th November 2007 on technical
inquiries into accidents or incidents concerning a nuclear
activity specifies the procedure to be followed. It is based
on the practices established for the other investigation
bureaus and takes account of the specific characteristics
of ASN, particularly its independence, its ability to impose
prescriptions or penalties if necessary and the concurrence
of its investigative and other duties.
GRAPH 5:
Events involving safety in NPPs, notified in 2015
Total 601
290
191
51
39
16
1
4
9
Design, manufacturing or assembly anomaly
Inadvertent start-up of a protection or safeguard system
Event or anomaly specific to the primary or secondary system
Transition to shutdown state in accordance with STE
or accident procedures
Automatic reactor trip
Other significant events which could affect safety
Event which caused or could cause multiple failures
Deviation from Operational Technical Specifications (STE)
or event which could lead to a deviation
GRAPH 6:
Events involving safety in BNIs other than NPPs notified in 2015
Total 178
Fault, deterioration or failure which affected a safety function
On-site or off-site hazard affecting the availability of important equipment
Event which caused or could cause multiple failures
Inadvertent start-up of a protection or safeguard system
Event actually or potentially affecting the containment of hazardous
materials
Other significant events which could affect safety
Event affecting a safety function and potentially constituting an accident precursor
2 1
80
29
28
21
13
4
Event which led to safety limit(s) being exceeded
145
CHAPTER 04:
REGULATION OF NUCLEAR ACTIVITIES AND EXPOSURE TO IONISING RADIATION
ASN report on the state of nuclear safety and radiation protection in France in 2015