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HRMT01 – TISD

HRMT01 – TISD Tests at HiRadMat of advanced SiC and Al 2 O 3 as model targets for radioisotope beam production HiRadMat Technical & Safety Review Collaboration :

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HRMT01 – TISD

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  1. HRMT01 – TISD Tests at HiRadMat of advanced SiC and Al2O3 as model targets for radioisotope beam production HiRadMat Technical & Safety Review Collaboration: Michal Czapski*, Thierry Stora*, Stefano Sgobba*, Raul Luis***, Stefano Marzari*, Serena Cimino*, DanielUrffer**, CarolineTardivat*** *CERN: EN-STI-RBS & EN-MME-MM **Saint Gobain CREE (advanced ceramics R&D) ***ITN Lisbon

  2. Goal of the proposal : Comparison ageing studies of influence of pulsed beams of 1.4 GeV (ISOLDE) and 450 GeV (HiRadMat) on new advanced model targets of tailored-made microstructure (synthesized at SG CREE – world leader in ice-templatingmethod) to understand how beam energy impacts ageing (causing decrease of good release efficiencies of ISOLDE targets). The study is a part of an upgrade of a ISOLDE facility i.e HIE-ISOLDE project

  3. The experiment General Plan: Preparation, assembly (in the nearby lab) and installation in the irradiation area (1 day) Beam time (4days – 1000 high intensity pulses) De-installation – cooling down time (expected 1 year) Removal from the area (1 day) Move in a lab at CERN (building 599) for analysis and tests

  4. Setup No Vacuum No additonal cooling

  5. preparation & installation PHASE • Sample material will be put into the aluminum container and screwed with two caps to isolate the irradiated material from external environment. • The stand supports and the container should be installed on the motorized table in one phase. SiC Graphite Alumina Not activated Not toxic Solid

  6. Operation phases Irradiation w44 (29/10-02/11) • 4.9×1013ppp • 1000 pulses • sigma=2.0 • Operated remotely from HRMT CR • Cool-down Storage and Maintenance • After the irradiation the table with the setup should be moved to the HiRatMat cool-down area for a period of one year • No post-exposure observations are planned before transport to the cool down area • No special precautions must be taken during the storage procedure

  7. RISK ANALYSISRadiological assessment RÈGLES GÉNÉRALES D'EXPLOITATION - CONSIGNES GÉNÉRALES DE RADIOPROTECTIONINSTRUCTION GÉNÉRALE DE SÉCURITÉ - Critères et exigences ALARA pour les interventions EDMS Id: 810176 v.2

  8. Radiological assessment

  9. SiC Alumina Al container

  10. RISK ANALYSISMechanical analysis 50W  lightbulb

  11. RISK ANALYSISMechanical integrity assessment • Assumption: • the highest energy deposition • No cooling through the container • No beam losses The worst case scenario

  12. Post-irradiation phase and disposal • 1 year of cool down • Dismantling (pliers, with RP officer) • Putting into lead-shielded container provided by HRMT • Transportation to b. 179 (RP officer, RP vehicle) • Pellets exctraction under the fume hood, disposal of the container • Putting samples into plastic bags, transportation in a lead-shielded container to b. 599 (EN/EMM-MM group) (RP officer, RP vehicle) • the SEM, XRD analysis (with RP officer) (following the steps of ISOLDE target #453) • Nessecary precautions (aerosol monitors) • Insertion/exctraction time < 1min • Sample holder • Mechanical separation (SEM casing, XRD window > 0,5 m)

  13. Measures • Technical measures • Single containment. The pellets will be put inside asealedaluminium container in order to avoid any radiological contamination • Additional shelter and/or cooling fins can be proposed to increase level of safety and mechanical stability • Two supports, which will confine a sample container in order to avoid any possible displacement of the container under irradiation. • Organizational measures • Access procedures according to EDMS 1155061 • Radiation cool-down period. The equipment should be stored for a period of one 1 year • Personal measures • All personnel involvedin setting up the experiment will complete the required CERN safety courses according to EDMS11549448

  14. Conclusions • Setup design ready for machining • 1 year cool-down should significantly and sufficiently increases the risk of radiological hazard (below C class) • Mechanical integrity should be preserved nevertheless additional precautions can be taken • Post-irradiation analysis should not be a cause of a radiological hazard nevertheless extra safety steps will be taken

  15. THANK YOU

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