1. How to deal with nuclear safety ?
Michel GIOT
« Research Talk »
Louvain‐la‐Neuve, 14th June 2011

2. Play on emoIons, not on truth…

3. It works !

4. A scale of risks
10−9 10-8 10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 = 1
This explains why
the zero risk
does not exist !!!

5. Similar explosions ?

6. Look at the clouds !
Atomic bomb tesIng
Tchernobyl

7. MiIgate the chemical accidents:
we have the means and the know‐how !

8. Be serious about nuclear safety

9. Safety Methodology
DEFENSE IN DEPTH:
5 levels (or 5 layers)
5‐ Emergency plan to limit radiological consequences outside
4‐ Resistance against “Beyond Design Basis Accident”
3‐ AddiIonal safety systems for “Design Basis
Accident”
2‐ ProtecIon and safety systems to limit incidents
1‐ Design, ConstrucIon and OperaIon: Safety, Quality

10. Level 1
1‐ Design, ConstrucIon and OperaIon: Safety, Quality

11. Level 2
2‐ ProtecIon and safety systems to limit incidents

12. Level 3 Double-wall
containment Core melt
with ventilation spreading
and filtration area
system
Containment
heat removal
system
Four-train
redundancy
Inner refueling for main
storage tank safeguard
systems
3‐ AddiIonal safety systems for “Design Basis Accident”

13. Level 4
iI aIng
rnal in stress
Exte for “
e vents
t ests”
4‐ Resistance against “Beyond Design Basis Accident”

14. Belgian Safety Authority:
Its Technical Support BEL V
OrganisaIon:
Some of their values:
Integrity, reliability, competence, mulIdisciplinary experIse,
transparency, communicaIon, …