HRMT01 – TISD
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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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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


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


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


Setup

No Vacuum

No additonal cooling


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


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


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


Radiological assessment


SiC

Alumina

Al container


RISK ANALYSISMechanical analysis

50W  lightbulb


RISK ANALYSISMechanical integrity assessment

  • Assumption:

  • the highest energy deposition

  • No cooling through the container

  • No beam losses

The worst case scenario


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)


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


  • 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


    THANK YOU


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