Dipartimento di ENERGIA

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1 DIPARTIMET DI EERGIA - CeSEF Dipartimento di EERGIA Centro Studi ucleari Enrico Fermi Radiochimica e Chimica delle Radiazioni nel Ciclo del Combustibile ucleare Mario Mariani Francesca Giacobbo Enrico Padovani

2 DIPARTIMET DI EERGIA - CeSEF Laboratory of Radiochemistry & Radiation Chemistry and Laboratory of Contaminants Migration & Safeguards

3 DIPARTIMET DI EERGIA - CeSEF Contaminants Migration & Safeguards Lab Lab Equipments UV-VIS, IR spectrophotometers potentiometric and electrochemical equipments HPLC ICP-MS experimental columns for transport experiments lisimeter filled with sand and clay hot cells and gloves boxes HPGe X-γ ray detectors ai(tl) detectors alfa spectrometers positron annihilation lifetime spectrometers centrifugal contactor battery fast neutron and gamma ray detectors

4 DIPARTIMET DI EERGIA - CeSEF Radiochemistry & Radiation Chemistry and Contaminant Transport & Safeguards Labs Permanent staff: Mario Mariani (Researcher) Francesca Giacobbo (Researcher) Enrico Padovani (Researcher) Mirko Da Ros (technician) Marco Giola (technician) 2 Post Doctoral Researchers 3 PhD students 4 Undergraduate students

5 DIPARTIMET DI EERGIA - CeSEF Basic and Applied Research Activities Partitioning of Fission Products, Lanthanides and Minor Actinides (i.e. Am, Cm ) from irradiated spent nuclear fuel Confinement of uclear Waste into inert solid matrices (i.e. zeolites, apatites, glasses ) Decommissioning & Waste Management of industrial and nuclear plants Radiation Damage of materials and ageing Radiation Processing for the improvement of the chemical physical properties of materials Chemical Dosimetry for technological and medical appplications

6 DIPARTIMET DI EERGIA - CeSEF Strategies for nuclear waste management

7 DIPARTIMET DI EERGIA - CeSEF Fuel Cycle Advanced strategies for radioactive waste management: partitioning Solvent extraction confinement Synthesis and characterization of matrices

8 DIPARTIMET DI EERGIA - CeSEF Reprocessing of spent nuclear fuel Partitioning of minor actinides (Am, Cm) from lanthanides by means of solvent extraction EC Projects: ewpart (FP4) Partnew (FP5) Europart (FP6) ACSEPT (FP7) Funding: European Commission EURATM Programme

9 DIPARTIMET DI EERGIA - CeSEF Reprocessing of spent nuclear fuel: Partitioning of MAs Solvent Extraction on simulated spiked solutions AQUEUS PHASE Ln acq RGAIC PHASE R R R R An acq H H H H AQUEUS PHASE RGAIC PHASE Ln acq Ln org R R R R An acq An org H H H H

10 DIPARTIMET DI EERGIA - CeSEF Reprocessing of spent nuclear fuel: Partitioning of MAs Examples of organic extractants Supramolecular ligands BTBPs Example: PAR4 Collaborations within the extractants synthesis: Università di Parma University of Reading (UK) Collaborations within the extraction tests: Università di Parma University of Reading (UK) CSIC - Barcellona

11 DIPARTIMET DI EERGIA - CeSEF Laboratory of Radiochemistry & Radiation Chemistry Engineering of solvent extration: Centrifugal Contactors (I) working scheme of a centrifugal contactor H 3 aq + Ln 2 γ γ 2 2 γ γ L L L L L L Diluent + Ligand-An Diluent + Ligand L L L L L H 3 aq + An/Ln

12 DIPARTIMET DI EERGIA - CeSEF Engineering of solvent extration: Centrifugal Contactors (II) example of 16-stage centrifugal contactor battery

13 DIPARTIMET DI EERGIA - CeSEF An example of calculated process scheme An Am 3+ recovery Am 3+ /Eu 3+ decontamination factor + Ln 1 EXTRACTI BATTERY 8 An 8-STAGE 99.67% > 95 AQUEUS PHASE RGAIC PHASE 16-STAGE 99.99% > concentration (mol.l-1) Ln Ligand PAR4 1,00E-03 1,00E-04 1,00E-05 the process flow-sheet can be designed and its performances calculated Profile of H+, Am(III), and Eu(III) concentration in organic phase 1,00E stage number H+ Am Eu

14 DIPARTIMET DI EERGIA - CeSEF Confinement Confinement of chloride/fluoride waste coming from pyrometallurgical partitioning processes in inorganic matrices Projects: ACSEPT (FP7) Collaborations: EEA - Casaccia; CEA - Marcoule Fluoroapatite Funding: European Commission EURATM Programme Sodalite

15 DIPARTIMET DI EERGIA - CeSEF Radiation Chemistry: Radiation Damage studies within Partitioning Irradiation Effects: reduction of extracting capabilities and selectivity Case study: C5-BTBP dissolved in cyclohexanone SF= D An / D Ln T. Retegan, C. Ekberg, S. et all The behaviour of organic solvents containing C5-BTBPand CyMe4-BTBP at low irradiation doses Radiochim. Acta 95, (2007)

16 DIPARTIMET DI EERGIA - CeSEF Radiation Damage on Polymers Effects induced by ionizing radiation on polymers * * PET * PE * Influence of the aromatic density on the stability Role of xygen in the radiation damage Radicals produced and their characterization

17 DIPARTIMET DI EERGIA - CeSEF Laboratory of Radiochemistry & Radiation Chemistry Radiation Damage on Polymers Molecular Weight Variation PE films PET films PE sheets PET sheets

18 DIPARTIMET DI EERGIA - CeSEF Radiation Damage on Polymers Degradation Mechanism PEA H C 2 Collaborations: Università di Pavia H Università di Bologna

19 DIPARTIMET DI EERGIA - CeSEF Chemical Dosimetry for radiotherapy and industrial applications Inorganic chemical dosimeters: study of dosimetric systems in gel state (Frixy-Gel) for high and low radiation doses. Polimeric dosimeters: development of a dosimeter based on polymerization promoted by ionizing radiation. Collaborations: Università di Milano, Università di Pavia

20 DIPARTIMET DI EERGIA - CeSEF Decommissioning & Waste Management uclear Waste characterization Radiochemical separation Analysis of difficult-to-measure radionuclides (i.e. H-3, Fe-55, i-59, i-63, Sr-90, α-emitters) in nuclear wastes TERM (Technologically Enhanced aturally ccurring Radioactive Materials) from industrial plants Chemical physical and radiometrical characterization Methods for removal, treatment and confinement

21 DIPARTIMET DI EERGIA - CeSEF Contaminants Migration and Safeguards Lab Contaminant transport in porous media Measurements and modelling of processes that govern contaminant transport through porous media Applications nuclear waste disposal, groundwater pollution and remediation Investigated Processes: Advection, dispersion, adsorption, desorption Experiments: Batch and Column experiments Porous media: Sands and Activated carbons Contaminants: Salts, Metal ions and Micro organic pollutants Predictive Models: Development of deterministic and stochastic models of contaminant transport in porous and fractured media Collaborations: Università di Milano, Parma, Pavia, Politecnico di Torino

22 DIPARTIMET DI EERGIA - CeSEF Strumentazione Contaminants Migration and Safeguards Lab Contaminant transport in porous media colonne sperimentali spettrofotometro UV-Vis Collaborations: Università di Milano, Parma, Pavia, Politecnico di Torino

23 DIPARTIMET DI EERGIA - CeSEF Strumentazione Contaminants Migration and Safeguards Lab Contaminant transport in porous media sistema HPLC strumentazione per misure potenziometriche, conduttimetriche e di radiazione gamma Collaborations: Università di Milano, Parma, Pavia, Politecnico di Torino

24 DIPARTIMET DI EERGIA - CeSEF Strumentazione Contaminants Migration and Safeguards Lab Contaminant transport in porous media lisimetro contenente sabbie e argille Collaborations: Università di Milano, Parma, Pavia, Politecnico di Torino

25 DIPARTIMET DI EERGIA - CeSEF Contaminants Migration and Safeguards Lab uclear safeguards Simulation of correlated count measurements for the detection of nuclear materials inside sealed tanks by means of passive and active (neutron, photon) interrogation Applications: U.S.A. homeland security Detectors Interrogating source? Detector Fissile sample Monte Carlo code developing: MCP-PoliMi, customized MCPX Collaborations: University of Michigan, RL, JRC-Ispra

26 DIPARTIMET DI EERGIA - CeSEF Strumentazione Contaminants Migration and Safeguards Lab uclear safeguards sistema di misura di fotoni e neutroni veloci Collaborations: University of Michigan, RL, JRC-Ispra

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