05-Oct-02 L. Moritz TRIUMF 4004 Wesbrook Mall Vancouver, B.C. V6T2A3 SAFERIB Workshop CERN, Oct.30-Nov.1,
05-Oct-02 Overview Short description of ISAC Shielding (tools and verification) Activation (yields and distribution) Target handling Contamination control Experience and plans for future
05-Oct-02 ISAC Parameters Reference Design: 100 A of 500 MeV protons on 95 g cm -2 UC 2 Reference Design: 100 A of 500 MeV protons on 95 g cm -2 UC 2 Authorization: 100 A of 500 MeV protons on targets Z 82 Authorization: 100 A of 500 MeV protons on targets Z 82 Application for targets with Z > 82 in preparation Ottawa
05-Oct-02 Targets (to September 2002) Targett (g cm -2 )Max. I p ( A) I p dt ( A h) CaO36.0<1070 CaO31.1<10363 Nb Nb Mo 197 Ta CaZrO SiC Nb Ta SiC SiC TiC Test only
05-Oct-02 ISAC at TRIUMF
05-Oct-02 ISAC Experimental Hall
05-Oct-02 ISAC-II (2005)
05-Oct-02 ISAC Target Stations 500 MeV Protons RIB Initial Installation: West Target Station Initial Installation: West Target Station Installation 2002: East Target Station
05-Oct-02 Shielding Bulk Shielding: Point source, line-of- sight attenuation Complicated geometries: FLUKA Verification: MCNP, LCS
05-Oct-02 Point Source, Line-of-sight Attenuation of Prompt Radiation Field Nuclear interaction probability High-energy neutron yield Angular dependence Exponential Attenuation Geometry factor
05-Oct-02 Parameters f n (E p ), h 0,, Nuclear interaction probability, f n Angular dependence, Attenuation length, Attenuation length, Source term, h 0 m=0.8
05-Oct-02 Test: 500 MeV Proton Beam Stop 1.8 m 2.9 m
05-Oct-02 ISAC Target Shielding (Plan) Steel Concrete (low Na) Radioactive Ion beam Slits Cu Beam dump Target Proton beam Concrete A A’
05-Oct-02 ISAC Target/ion Source Shielding ion beam steel 0 1m concrete concrete & steel Service space recycled steel target vacuum seals (Section AA’)
05-Oct-02 Streaming Through Pre- separator Maze Target: 50 g cm -2 UC 2 E p = 500 MeV I p = 100 A FLUKA simulation
05-Oct-02 Pre-separator Maze Added shielding Before After
05-Oct-02 ISAC Target Module
05-Oct-02 Target Module Service Ducts Target/Ion Source
05-Oct-02 Sv/h Streaming Through Target Vacuum Exhaust Ducts Target: 50 g cm -2 UC 2 E p = 500 MeV I p = 100 A p Air Concrete- steel
05-Oct-02 Streaming Through Ducts Concrete- steel Air
05-Oct-02 Composition of Top Shield
05-Oct-02 Radiation Fields above Target Sv/h Andersson-Braun Measurement 100 A on Mo Target Test Andersson-Braun Measurement 100 A on Mo Target Test
05-Oct-02 Activation Experimental Cross-sections Silberberg & Tsao FLUKA, LAHET, MCNPX ORIGEN
05-Oct U(p,x) Cross Section Comparison at 500 MeV LCSFLUKAExperimentalSilberberg & Tsao ………… Fission Spallation Peripheral
05-Oct-02 Silberberg & Tsao (YIELDX) 500 MeV Protons
05-Oct-02 FLUKA Simulation (500 MeV protons on UC 2 target) 18 cm 1.4 cm UC 2 (5.076 g cm -3 ) 67 mm UC 2 (5.076 g cm -3 ) Ta H2OH2O 27 mm p p
05-Oct-02 Yields: UC 2 target (FLUKA simulation) 18 cm 1.4 cm UC 2 (5.076 g cm -3 ) 500 MeV p
05-Oct-02 ORIGEN (build-up and decay) Beam OnBeam Off
05-Oct-02 Decays Leading to 210 Po 210 Po Long-lived Not in ORIGEN Library
05-Oct-02 ISAC Target Handling Target Maintenance Hall
05-Oct-02 Maximum -field Outside ITMH ~10 1 m 1 Sv/h
05-Oct-02 ISAC Target Servicing: Hot Cells Target storage pit Hot Cells Target storage pit
05-Oct-02 ISAC target hot cell roof docking mechanism
05-Oct-02 ISAC target being docked in hot cell
05-Oct-02 ISAC Hot Cells Before Installation of Windows
05-Oct-02 View Through ISAC Hot Cell Window
05-Oct-02 Contamination Control Ventilation System Production of Radioactivity in Air Typical Release Rates Production of Volatile Radioactivity Vacuum Exhaust Handling
05-Oct-02 Ventilation System Hot Cell Service Room Hot Cell Target Service Space Presep. Cave Mass Separator Room Experimental Hall Services Target Maintenance Hall Fan Standby Fan Secondary Filters Primary Filters Air pressure depression relative to outside Stack
05-Oct-02 Radioactivity Production in Air
05-Oct-02 Production in Pre-separator Vault Nuclide Production rateRelease rate (s -1 )(Bq a -1 )(%DRL) 3H3H7.8x x x Be7.4x x x C1.5x x x N5.8x x x O2.3x x x Ar1.9x x x10 -5 Total1.8x x10 -3 (3000 hours per year, 100 A on 238 UC 2 target)
05-Oct-02 Production in Target Service Space (3000 hours per year, 100 A on 238 UC 2 target) Nuclide Production rateRelease rate (s -1 )(Bq a -1 )(%DRL) 3H3H9.5x x x Be2.2x x x C4.6x x x N1.1x x x O4.8x x x Ar3.6x x x10 -5 Total8.1x x10 -4
05-Oct-02 Releases to Atmosphere (Gaseous, 2001) IsotopeTotal Release (MBq)DRL (MBq)% of DRL 127 Xe3.4 Ar+ 10 -3
05-Oct-02 Production of Volatiles Target Hg I/Xe Rb/Kr Cl/Ar Ne b+b+ volatiles
05-Oct-02 Vacuum Exhaust System HEPA filter Charcoal filter Operating storage Long-term storage Pre-separator Mass-separator TIS Exit modules TP MP Secondary Primary Slits
05-Oct-02 Releases to Atmosphere (Particulates, 2001) IsotopeTotal Release (MBq)DRL (MBq)% of DRL 77 Br1.3 Se2.7 Mn4.3 I2.7 Cs4.7 Sr1.7 Br4.5 I2.3 Co2.3 Nb2.7 I1.4 Total2.5 10 -5
05-Oct-02 Experience Contamination Issues Collective Dose
05-Oct-02 One (!) Contamination Incident (June 2000) Target Station Hot Cell Nb target Ta target NuclideBq cm Rb Se Sr Yb0.03 Total No contamination after step 1 Uniform contamination after step 1 No other significant contamination since June 2000 No other significant contamination since June 2000
05-Oct-02 TRIUMF Collective Dose So far ISAC has had no significant impact on TRIUMF collective dose Start of ISAC operation
05-Oct-02 Future Plans Task Force to pursue licensing for actinide targets Proposed test station to measure yields and transport properties of alpha-emitters Proposed second proton beam line to feed second target station
05-Oct-02 Conceptual Design of Proposed Test Station
05-Oct-02