LIEBE Project review Safety work-package 25.06.2014

5th High Power Targetry Workshop

LIEBE Project review Safety work-package25.06.2014V.Barozier2, AP.Bernardes2, J.Blaha2, M.Delonca2, A.Marchix1, T.Melo Mendonca2, T.Stora2, J.Vollaire2

Cea Saclay1, Cern2


OutlineRadioprotectionIsotopes inventoryALARARisk analysisSimilar to a static targetSpecific LIEBEConclusion

25/06/2014LIEBE Project Meeting*


RadioprotectionRelease of polonium is a driving element for safety Already true for the static Pb-Bi target. Contamination is already managed at ISOLDEProduction of PoloniumDirect production via (p,xn) reactions on 209Bi-decay from 210Bi produced by neutron activation Secondary helium-induced reactions in Bi and Pb



Isotopes InventoryAcknowledgment J.Blaha/CERN, A.Marchix/CEAMain contributor in terms of radiotoxicity (>1% of total) is defined by the LA (N.B. Authorization Limits take into account the radiotoxicology of the given nuclide, Ref:ORaP*) 1 LA 5mSv dose due to inhalation exposure


Isotopes InventoryAcknowledgment J.Blaha/CERN, A.Marchix/CEAAfter 1 year25/06/2014LIEBE Project Meeting*


Validation of simulation with irradiated Pb-Bi samples on ISOLDE proton beamAcknowledgment J.Blaha/CERN, A.Marchix/CEA, M Melo Delonca/CERN, S.Lahiri/SINPIsotopes InventoryFLUKA (CERN) and MCNPX INCL4.6 ABLA07Isotopes inventoryPb-Bi samples irradiation and comparison with simulation for validation of activities inventory25/06/2014LIEBE Project Meeting*


Ratio between calculated and measured activities (calculation with INCL4.6-ABLA07/CINDER)Acknowledgment A.Marchix/CEA, M Melo Delonca/CERN, S.Lahiri/SINPIsotopes InventoryWithin factor 3 between measured and calculated activity Large discrepancies for nuclides closed to 1 Bq activity25/06/2014LIEBE Project Meeting*


Dose rate for the Pb388 target at 2m30 from the target 1E18 protons Acknowledgment A.DorsivalALARADecay time start-up 10mSv/h. Storage of the target

Factor 2 After 1 day decay25/06/2014LIEBE Project Meeting*


New fast connectors are needed

Modification is needed on irradiated Front-end to avoid to send people to disconnect the target after irradiation

Cooling system and pump as well

Acknowledgment T.Melo Mendonca and V.Barozier/CERNALARA25/06/2014LIEBE Project Meeting*


Risk analysis Similar to a static targetInstantaneous power: 1 GWBeam window container rupture of a Pb static target due to beam impact Shock wave due to beam on Pb-Bi may induce dramatic failures of the loop 25/06/2014LIEBE Project Meeting*


Risk analysis Similar to a static targetPreventing shock wave due to beam on Pb-BiPrevention:ANSYS calculation to be finished to demonstrate no failure on beam window or grids

Safety barriersVessel is enclosing the full Pb-Bi loop including the filling tank and acts as double envelopeLeak detection



Risk analysis Similar to a static targetTransfer of Pb-Bi liquid to the FE25/06/2014


Risk analysis Similar to a static targetWater leak inside targetTarget base cool down with water25/06/2014LIEBE Project Meeting*


Risk analysis Specific to LIEBE targetWater leak heat exchanger25/06/2014LIEBE Project Meeting*


Risk analysis Specific to LIEBE targetSolidification of Pb-Bi (cold point or oxides)25/06/2014LIEBE Project Meeting*


Risk analysis Specific to LIEBE targetTarget Handling25/06/2014LIEBE Project Meeting*


ConclusionIsotopes inventory done

ALARA principle to be developed and tested

Preliminary Failures analysis and input on design done.

Failure analysis to be updated with tests on loop



AcknowledgementsCEA: A.MarchixCERN: V.Barozier, J.Blaha, M.Delonca, T.Melo Mendonca, T.Stora, J.VollaireIPUL: K.Kravalis, R.NikoluskinsPSI: D.SchumannSCK.CEN: D.Houngbo, L.Popescu, P.SchuurmansSINP: S.Lahiri



LIEBE Project review Safety work-package 25.06.2014

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