1. EURISOL, TASK#5, Bucuresti, 22-23 November 1 Preliminary shielding assessment of EURISOL Post Accelerator D. Ene, D. Ridikas. B. Rapp

2. EURISOL, TASK#5, Bucuresti, 22-23 November 2 Tunnel shielding configuration. –Thicknesses of shield blocks –Beam dump designs & shields Induced radioactivity and dose rates for planning interventions inside the tunnel. Radiation environment characterisation – Production of contaminants – Source term for airborn transportation Goals:

3. EURISOL, TASK#5, Bucuresti, 22-23 November 3 12 or 3 Experimental areas and beam dump 2 LINAC Without stripper 0.585 MeV/u 150 MeV/u 209 m 44 m 10 -5 - 10 -4 /m Nb + Fe or Al + Cu + He Exit 5 - 20 MeV/u Experimental area and beam dump 21.3 MeV/u Schematic view of the two options for the EURSIL-variant# 1 Energy gradient for 132 Sn 25+ Energy Gradient [MeV/m] Position in beam line [m] Energy of beam [MeV] 0.50-440.585 – 21.3 0.644 - 8021.3 -46 0.880 - 12046 -76 1120 - 16076-115 0.9160 - 209115-150 1 => RFQ section

4. EURISOL, TASK#5, Bucuresti, 22-23 November 4 12 or 3 Schematic view of the two options for the EURSIL-variant# 2 Energy gradient behind the stripper for 132 Sn 25+ Energy gradient [MeV/m] Position in beam line [m] Energy of beam [MeV] 0.50 - 2021.3 -30.3 1.520 – 6030.3 - 89.4 1.160 - 80 89.4 - 112 1.780 – 102112 - 150 3 102 m With stripper Foil : C 3 mg/cm² Cu + Fe + slits (2mm W, 1cm Cu) Experimental areas and beam dump LINAC 10 m Stripper 0.585 MeV/u150 MeV/u 21.3 MeV/u 10 -5 - 10 -4 /m 60 % in the first 5 m Nb+Fe or Al+Cu+He Exit 5 - 20 MeV/u Experimental area and Beam dump Nb+Fe or Al+Cu+He 44 m 1 => RFQ section

5. EURISOL, TASK#5, Bucuresti, 22-23 November 5 Reachable output energy depending on the ions A/Q Conceptual baseline design for the EURISOL post-accelerator SPIRAL-2 linac lay-out

6. EURISOL, TASK#5, Bucuresti, 22-23 November 6 Shielding design requirements H*(10) [  Sv h -1 ] Total_H*(10) [mSv y -1 ] Public areas0.11 Controlled areas1020 / 2000 h Accident beam loss: Total_H*(10) ≤ 10  Sv

7. EURISOL, TASK#5, Bucuresti, 22-23 November 7 Calculation model 132 Sn  Results obtained for z=3m, opening   (18 o – 53 o )

8. EURISOL, TASK#5, Bucuresti, 22-23 November 8 PROMPT RADIATION: assumptions & approach* A shield designed for a continous beam loss of 10 -5 m -1 during the routine operation is also adequate for an accident loss of the full beam at a localised point, providing that the linac cutoff time is less than 1s. * S. Agosteo, M. Silari, CERN Note 088/ TIS-RP/TM/2001-028 ** A. Fasso, K. Göebel et all Shielding against high energy radiation, Nuclear and Particle Physics, Vol 11, (1990) A full beam loss at a localised point must not give rise to a D.E.R. > 100 mSv/h outside the shielding and the beam has to be swithed off within a time short enough that the D.E. from this accident condition remains negligible.

9. EURISOL, TASK#5, Bucuresti, 22-23 November 9 PROMPT RADIATION: method for bulk shielding calculation A shield designed for a continous beam loss of 10 -4 m -1 during the routine operation is also adequate for an accident loss of the full beam at a localised point, providing that the linac cutoff time is less than 1s.

10. EURISOL, TASK#5, Bucuresti, 22-23 November 10 PROMPT RADIATION: EURSIL shielding - first approximation Variant# 1 Length (m) Thickness (cm) staff 10 8 pps | 10 9 pps public 10 8 pps | 10 9 pps 4440 | 70 105 | 135 165165 | 225280 | 340 V * (m 3 )= 290 | 402508 | 620 staff public Dump / 2.8kW | 165 | 230 Dump / 19.8kW | 385 | 500 Variant# 2 Length (m) Thickness (cm) staff 10 8 pps | 10 9 pps public 10 8 pps | 10 9 pps 4440 | 70 105 | 135 10160225 102150| 200260 | 320 V * (m 3 )= 187 | 251334 | 408 * Correspond to width = 1m beam dump RFQ SIL(1) SIL(2 ) Experiment rooms 0.585 MeV/u 21.3 MeV/u150 MeV/u Experiment rooms 44 m165 m 2.8 W 10 -4 m -1 => 19.8 W 10 -4 m -1 => beam dump Experiment rooms Experiment rooms RFQ SIL(1) SIL(2 ) 0.585 MeV/u 21.3 MeV/u150 MeV/u 44 m102 m 2.8 W 10 -4 m -1 => 7.92 W 10 -4 m -1 => Stripper 10 m 1.68 kW Uncontrolled beam loss of 10 -4 m -1

11. EURISOL, TASK#5, Bucuresti, 22-23 November 11 PROMPT RADIATION: EURSIL shielding - detailed strategy Variant# 1 Variant# 2 Uncontrolled beam loss of 10 -4 m -1

12. EURISOL, TASK#5, Bucuresti, 22-23 November 12 E [MeV/u]   [Sv m -2 ion -2]  [g cm -2] H  [Sv m -2 ion -2]  [g cm -2 ] 1502.00E-1038.787.98E-1162.00 1151.13E-1023.506.14E-1157.32 766.18E-1121.361.27E-1153.20 45.51.69E-1112.191.55E-1140.52 21.3--2.00E-1233.57 PROMPT RADIATION: Neutron attenuation curves in concrete

13. EURISOL, TASK#5, Bucuresti, 22-23 November 13 PROMPT RADIATION: Schematic diagram of EURSIL shielding (2) staff Energy [MeV]21.345.576115150 Length [m]4440 45 Thickness (cm)70130175210225 V(cm 3 )342.05 => 85% V_aprox1 RFQ SIL(1) SIL(2 ) Experiment rooms 0.585 MeV/u 21.3 MeV/u 150 MeV/u Experiment rooms 44 m 165 m 2.8 W 10 -4 m -1 => 19.8 W15 W10 W6 W beam dump Uncontrolled beam loss of 10 -4 m -1

14. EURISOL, TASK#5, Bucuresti, 22-23 November 14 PROMPT RADIATION: Schematic diagram of EURSIL shielding (2) staff Energy [MeV]21.3 Stripper 45.576115150 Length [m]441031213317 Thickness (cm)70160110150180200 V(cm 3 )205.8 => 81% V_aprox1 RFQ 0.585 MeV/u SIL(1) SIL(2 ) Experiment rooms 21.3 MeV/u 150 MeV/u Experiment rooms 44 m 102 m 2.8 W 10 -4 m -1 => 7.92 W 6 W4 W2.4 W beam dump Stripper 1.68 kW Uncontrolled beam loss of 10 -4 m -1

15. EURISOL, TASK#5, Bucuresti, 22-23 November 15 PROMPT RADIATION: Other produced secondary particles

16. EURISOL, TASK#5, Bucuresti, 22-23 November 16 PROMPT RADIATION: Photon attenuation curves in concrete

17. EURISOL, TASK#5, Bucuresti, 22-23 November 17 PROMPT RADIATION: Other ion species

18. EURISOL, TASK#5, Bucuresti, 22-23 November 18 RESIDUAL RADIATION: Method Neutron flux in i th cell ⇨ The neutron flux is assumed to be constant over the irradiation period and not being modified by the irradiated medium Geometry and materials description DCHAIN- SP-2001 PHITS Residues in i th cell Activation products in i th cell Irradiation scheme H*(10) MCNPX

19. EURISOL, TASK#5, Bucuresti, 22-23 November 19 Residual RADIATION: Activation of copper

20. EURISOL, TASK#5, Bucuresti, 22-23 November 20 Residual RADIATION:H*(10)* from irradiated copper target * ANSI/ANS-6.1.1-1977 Photon Flux to DER CF

21. EURISOL, TASK#5, Bucuresti, 22-23 November 21 Residual RADIATION: Induced radioactivity in concrete walls

22. EURISOL, TASK#5, Bucuresti, 22-23 November 22 Residual RADIATION: Induced radioactivity/H*(10) in concrete walls H*(10)_contact  2  Sv/h for 1h cooling time H*(10)_at 1m = 0.4  Sv/h for 1h cooling time

23. EURISOL, TASK#5, Bucuresti, 22-23 November 23 Residual RADIATION: Induced radioactivity in air

24. EURISOL, TASK#5, Bucuresti, 22-23 November 24 Residual RADIATION: 132 Sn Implantation in SIL structure

25. EURISOL, TASK#5, Bucuresti, 22-23 November 25 Residual RADIATION: Activity / H*(10) inside the tunnel

26. EURISOL, TASK#5, Bucuresti, 22-23 November 26 SIL concrete shielding configurations were estimated and compared; Results of the first evaluations of residual field inside the tunnel were analysed. Follow-up works:  Finalising the results using a better statistics and fixing the problem of resulted prompt photon dose level ;  Beam dumps design and associated shields;  Sizing of the shield and management of the access to the controlled areas inside experimental halls ;  Estimates of the contaminant production in the surrounding rock and the source term for the airborne transportation necessary for environment impact assessment. Summary & Planning

27. EURISOL, TASK#5, Bucuresti, 22-23 November 27 Backup

28. EURISOL, TASK#5, Bucuresti, 22-23 November 28 Proton, 3 He, 238 U Comparison U-238 : 400 MeV/u He-3 : 777 MeV/uproton : 1 GeV Beam on stopping Cu target Beam direction

29. EURISOL, TASK#5, Bucuresti, 22-23 November 29 Compare Effective Dose Equivalent for Different Beams

30. EURISOL, TASK#5, Bucuresti, 22-23 November 30

31. EURISOL, TASK#5, Bucuresti, 22-23 November 31