1. Radiation protection and radiation safety issues for HIE-ISOLDE. FLUKA calculations Y. Romanets ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010 CERN ITN

2. ISOLDE Workshop and Users meeting 2010 Summary  Geometry Installation Installation Targets’ areas Targets’ areas  HRS (High Resolution Separator)  GPS (General Purpose Separator) Targets configuration Targets configuration  Dose rate simulations (FLUKA) Parking area Parking area Gas storage Gas storage  On-going work  Conclusions

3. ISOLDE Workshop and Users meeting 2010 ISOLDE facility, geometry CERN, 8 December 2010 50 m GPS Target HRS Target Proton beam Target geometry Target Plane z=0 40 cm Beam direction Ta (Tantalum) target Density 16.654 g/cm 3 UC x (Uranium Carbide) Density 3.25 g/cm 3

4. 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)

5. ISOLDE Workshop and Users meeting 2010 Simulations, HRS Tungsten convertor + Tantalum target Neutron flux, plane z ( -10cm : +10cm ) Bias OFF Bias ON

6. ISOLDE Workshop and Users meeting 2010 Simulations, HRS Tungsten convertor + Tantalum target Neutron flux, plane z ( -400cm : +400cm ) Bias region

7. ISOLDE Workshop and Users meeting 2010 Dose rate, HRS Parking area CERN, 8 December 2010 Parking area Earth, beam dump shielding Concrete wall No target case. Direct impact of the beam on the beam dump The worst scenario from the radioprotection point of view -20 -10 0 10 20 HRS target HRS beam dump Plane Z=0 -20 -10 0 10 20 Y X

8. ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010 Plane Z Plane Y Dose rate, HRS Parking 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 18 m 16 m

9. ISOLDE Workshop and Users meeting 2010 Dose rate, GPS Gas 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 -10 0 10 20 Y X

10. ISOLDE Workshop and Users meeting 2010 Dose rate, GPS Gas storage UC target Tantalum target 1.4 GeV proton beam Dose-EQ (µSv/h/µA), Plane Z Gas storage

11. 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 Neutron flux

12. 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.

13. 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

14. ISOLDE Workshop and Users meeting 2010 Thank you CERN, 8 December 2010

15. ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010

16. 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 Proton flux

17. ISOLDE Workshop and Users meeting 2010 CERN, 8 December 2010