Transcript Catégories d`accidents professionnels

Accident Statistics 2010-2014
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
1
Catégories d’accidents professionnels
•
8 accidents de trajet
•
34 accidents de
travail
•
140 jours de congé
maladie
•
39 jours de congé
maladie
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
2
Evolution temporelle
14
12
10
8
Travail
Trajet
6
4
2
0
2010
2011
2012
18. 9. 2014
2013
2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
3
Types d’accidents
No
Type
7
Outillage à main ou poratatif
6
Manipulation de charges
5
Véhicules
4
Chute de plein pied ou avec dénivellement
4
Heurt au poste de travail
4
Produits chimiques
2
Particules ou masses projetés
1
Machines outils
1
En voulant récupérer un chaton tombé dans une fosse ,
s'est fait mordre 2 doigts
0
Radiation
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
4
Radiation Hazard
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
5
Radiation Hazard
•
•
Where does it come from ?
How can I protect myself ?
•
•
•
•
Time , distance, shileding
Personal dosimeters
What are the dose limits ?
How to get a radioactive object from A to B ?
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
6
Where does radiation come from ?
•
•
•
•
Operating particle Accelerators
Accelerators in maintenance
Radioactive sources
Sources of X-rays
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
7
Operating Particle Accelerators
•
•
•
•
Accelerated particle
beam is misguided
High-energy
particles collide with
matter
Instantaneous
generation of
radiation cascade
Very high dose rate
– access forbidden
18. 9. 2014
n
TE-MSC Safety Day - Thomas Otto,
TE-DSO
8
Accelerators in Maintenance
•
•
•
Nuclear reactions have
generated radioactive nuclei
in matter
Radioactive nuclei decay
slowly (over weeks to years)
under emission of radiation
Low to moderate dose rates.
Access and work possible
under safety conditions
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
9
Dose limits
•
The legal dose limit is 20 mSv in one year.
•
•
•
A worker receiving 20 mSv every year of his
career would have the same probability death
from professional illness (cancer) than any
worker in a “safe” industry (occupational
accident or illness).
At CERN, an action level is fixed at 6 mSv, from
whereon strict optimisation measures are taken.
Only half a dozen workers received more than
3 mSv during LS1, most workers have zero dose
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
10
External vs. Internal Radiation
Very frequent at CERN
Protection by
optimisation (time –
distance – shielding)
Not very frequent at
CERN. Protection by
specific clothing
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
11
How can I protect myself ?
External radiation
•
Reduce time in
close to radioactive
objects
•
Increase distance
object
•
Place shielding
between you and
the object
18. 9. 2014
11
12
1
10
2
9
3
8
4
7
6
5
111
TE-MSC Safety Day - Thomas Otto,
TE-DSO
12
Personal Dosimeters
Personal Dosimeter (DIS)
18. 9. 2014
Operational Dosimeter
TE-MSC Safety Day - Thomas Otto,
TE-DSO
13
Transport of Radioactive Objects
•
•
Assume that any object coming out of a
radioactuive area is radioactive by itself
Place it in the buffer zone
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
14
Request for Transport
•
Use TREC to ask for measurement and
transport (http:\\trec.cern.ch)
•
RP will make a measurement
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
15
How to transport ?
•
•
•
You will be informed of the result.
If the object has been declared non-radioactive,
you can transport it yourself
If not, a transport request for radioactive goods
will be generated for EN-HE.
18. 9. 2014
TE-MSC Safety Day - Thomas Otto,
TE-DSO
16