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

EURISOL, TASK#5, Bucuresti, 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:

EURISOL, TASK#5, Bucuresti, November 3 12 or 3 Experimental areas and beam dump 2 LINAC Without stripper MeV/u 150 MeV/u 209 m 44 m /m Nb + Fe or Al + Cu + He Exit 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] – => RFQ section

EURISOL, TASK#5, Bucuresti, 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] – – m With stripper Foil : C 3 mg/cm² Cu + Fe + slits (2mm W, 1cm Cu) Experimental areas and beam dump LINAC 10 m Stripper MeV/u150 MeV/u 21.3 MeV/u /m 60 % in the first 5 m Nb+Fe or Al+Cu+He Exit MeV/u Experimental area and Beam dump Nb+Fe or Al+Cu+He 44 m 1 => RFQ section

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

EURISOL, TASK#5, Bucuresti, 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

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

EURISOL, TASK#5, Bucuresti, November 8 PROMPT RADIATION: assumptions & approach* A shield designed for a continous beam loss of 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/ ** 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.

EURISOL, TASK#5, Bucuresti, November 9 PROMPT RADIATION: method for bulk shielding calculation A shield designed for a continous beam loss of 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.

EURISOL, TASK#5, Bucuresti, 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 | | | | 340 V * (m 3 )= 290 | | 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 | | | | 320 V * (m 3 )= 187 | | 408 * Correspond to width = 1m beam dump RFQ SIL(1) SIL(2 ) Experiment rooms MeV/u 21.3 MeV/u150 MeV/u Experiment rooms 44 m165 m 2.8 W m -1 => 19.8 W m -1 => beam dump Experiment rooms Experiment rooms RFQ SIL(1) SIL(2 ) MeV/u 21.3 MeV/u150 MeV/u 44 m102 m 2.8 W m -1 => 7.92 W m -1 => Stripper 10 m 1.68 kW Uncontrolled beam loss of m -1

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

EURISOL, TASK#5, Bucuresti, November 12 E [MeV/u]   [Sv m -2 ion -2]  [g cm -2] H  [Sv m -2 ion -2]  [g cm -2 ] E E E E E E E E E PROMPT RADIATION: Neutron attenuation curves in concrete

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

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

EURISOL, TASK#5, Bucuresti, November 15 PROMPT RADIATION: Other produced secondary particles

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

EURISOL, TASK#5, Bucuresti, November 17 PROMPT RADIATION: Other ion species

EURISOL, TASK#5, Bucuresti, 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

EURISOL, TASK#5, Bucuresti, November 19 Residual RADIATION: Activation of copper

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

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

EURISOL, TASK#5, Bucuresti, 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

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

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

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

EURISOL, TASK#5, Bucuresti, 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

EURISOL, TASK#5, Bucuresti, November 27 Backup

EURISOL, TASK#5, Bucuresti, 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

EURISOL, TASK#5, Bucuresti, November 29 Compare Effective Dose Equivalent for Different Beams

EURISOL, TASK#5, Bucuresti, November 30

EURISOL, TASK#5, Bucuresti, November 31