radiation protection and radiation safety issues for hie-isolde. fluka calculations
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CERN ITN. Radiation protection and radiation safety issues for HIE-ISOLDE. FLUKA calculations . Y. Romanets. ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010. Summary. Geometry Installation Targets’ areas HRS (High Resolution Separator) GPS (General Purpose Separator) - PowerPoint PPT PresentationTRANSCRIPT
Radiation protection and radiation safety issues for HIE-ISOLDE. FLUKA calculations
Y. Romanets
ISOLDE Workshop and Users meeting 2010
CERN, 8 December 2010
CERNITN
ISOLDE Workshop and Users meeting 2010
Summary
Geometry Installation Targets’ areas
HRS (High Resolution Separator) GPS (General Purpose Separator)
Targets configuration Dose rate simulations (FLUKA) Parking area Gas storage
On-going work Conclusions
ISOLDE Workshop and Users meeting 2010
ISOLDE facility, geometry
CERN, 8 December 2010
50 m
50 m
GPSTarget
HRSTarget
Proton beam
Target geometry
Target
Plane z=0
40
cm
40 cm
Beam direction
Ta (Tantalum) target Density 16.654 g/cm3 UCx (Uranium Carbide) Density 3.25 g/cm3
ISOLDE Workshop and Users meeting 2010
Simulation
Bias ON/OFF Selected bias direction
Proton beam characteristics Energy: 1.4 GeV and 2 GeV Normalization to 1 µA (6.24e12 protons/second)
ISOLDE Workshop and Users meeting 2010
Simulations, HRS Tungsten convertor + Tantalum target
Neutron flux, plane z ( -10cm : +10cm )
Bias OFF
Bias ON
ISOLDE Workshop and Users meeting 2010
Simulations, HRS Tungsten convertor + Tantalum target
Neutron flux, plane z ( -400cm : +400cm )
Neutron flux, plane z ( -400cm : +400cm )
Bias region
ISOLDE Workshop and Users meeting 2010
Dose rate, HRSParking area
CERN, 8 December 2010
Parking area
Earth, beam dump shielding
Concrete wall
No target case. Direct impact of the beam on the beam dumpThe worst scenario from the radioprotection point of view
-20 -10 0 10 20
HRS target
HRS beam dump
Plane Z=0
-20
-1
0
0
10
20
Y
X
ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010
Plane Z
Plane Y
Dose rate, HRSParking area
Y
X
X
Z
Plane X
Z
Y
Parking area
2 GeV proton beam Dose-EQ (µSv/h/µA)
14 m
18
m
14 m
14
m
18 m
16
m
ISOLDE Workshop and Users meeting 2010
Dose rate, GPSGas storage
CERN, 8 December 2010
Gas storage
UC and Ta target cases. The scenario for the most used targets
-20 -10 0 10 20
GPS target
GPS beam dump
Plane Z=0
-20
-1
0
0
10
20
Y
X
ISOLDE Workshop and Users meeting 2010
Dose rate, GPSGas storage
UC target
Tantalum target
1.4 GeV proton beam Dose-EQ (µSv/h/µA), Plane Z
Gas storage
ISOLDE Workshop and Users meeting 2010
Neutron production rate, GPS
CERN, 8 December 2010
1.4 GeV proton beam Ta target
UC target
100
10
1
0.1
0.01 1e-12 1e-10 1e-8 1e-6 1e-4 1e-2 1 1e2 GeV
Neu
tron
flux
ISOLDE Workshop and Users meeting 2010
On-going work
CERN, 8 December 2010
Comparison of simulation results with measurements
Simulation of the critical parts of the installation. Evaluation of possible impact of upgrade on existing shielding
Activation calculation of the shielding-soil and air inside installation.
ISOLDE Workshop and Users meeting 2010
Conclusions
CERN, 8 December 2010
The GPS area needs more attention from the radiation protection point of view taking into account upcoming upgrade of the installation. The dose rate of the adjunctive and supply areas depends on the type(material) of the target in use.
HRS area represent sufficient beam dump shielding which is adequate to support increasing power of the beam due upgrade.
Some part of the installation (shielding between active zone and experimental area) need to be revised with more precision due possible radiation leaks
ISOLDE Workshop and Users meeting 2010
Thank you
CERN, 8 December 2010
ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010
ISOLDE Workshop and Users meeting 2010
Proton flux, GPS
CERN, 8 December 2010
1.4 GeV proton beam
Ta target
UC target
1000
100
10
1
0.1
1e-2 1e-1 1 GeV
Prot
on fl
ux
ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010