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

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


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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

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

Setup

No Vacuum

No additonal cooling


Preparation installation phase

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

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 analysis radiological assessment

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

Radiological assessment


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SiC

Alumina

Al container


Risk analysis mechanical analysis

RISK ANALYSISMechanical analysis

50W  lightbulb


Risk analysis mechanical integrity assessment

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

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

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

    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


    Hrmt01 tisd

    THANK YOU


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