Head of department Dr. Artūras Plukis
phone +370 5 266 1654
Laboratories:
Two identical High resolution gamma ray spectrometers
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Ion accelerator "Tandetron 4110A“ (General Ionex Corp.)
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Alpha particle spectrometer "Octete Plus"
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X-ray spectrometer (Canberra BNLS) https://www.mirion.com/products/ Two X-ray spectrometers and 7905-BWR bellows-sealed windowless retractable cryostat. It has lithium-drifted silicon 30 mm2 active area, sensitive to ionizing radiation, particularly to X-rays and gamma rays. Detector resolution (FWHM) is 165 eV at 5.894 keV for 55Fe X-ray peak; and X-rays Amptek X-123 spectrometer which uses a thermoelectrically cooled Si-PIN junction detector (area – 25 mm2, thickness – 0.5 mm), that transmits signals via pre-amplifier to digital pulse processor DP5, consisting of shaping – amplifier and a multichannel analyzer. Before entering detector, the incident photons pass a protective 25 μm Be foil and a collimator. |
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FHT 770 T6 low level α, β counter (Thermo Scientific) |
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Four 239PuBe neutron sources with a total activity of 5.7·107 n.s-1 and storage device of the neutron sources The neutrons are used for irradiation and for educational (material composition determination via activation, life time experiments, coincidence experiments and other) purposes. The neutron source storage device is the cylindrical well 0.6 m of diameter, 1.8 m of depth under the ground, which is filled by polyethylene matrix as moderator. The neutron sources are placed in central channel of the well and two vertical experimental channels are situated 15 cm and 20 cm from the source to obtain different neutron flux characteristics during irradiation experiments. |
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Two identical GC2520 series HPGe coaxial detectors (Canberra) https://www.mirion.com/products/germanium-detectors With a relative efficiency of 25%, and with an energy resolution of 2.0 keV at the energy of 1.33 MeV are used for identification and/or quantification of radionuclides by analysis of the gamma-ray energy spectrum. This method is widely used in the environmental radioactivity monitoring, worker health monitoring, reactor corrosion monitoring, forensic examination, nuclear medicine, material testing, monitoring of industrial processes. An electronic setup includes a high-voltage power supply, a preamplifier, a spectroscopy amplifier, and a analog-to-digital converter (Canberra), driven by a PC with the software GENNIE2K for the analysis. |
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Single stage accelerator mass spectrometer (SSAMS, NEC, USA) | |
Elemental analyzer (EA, Vario Isotope Select, Elementar, GmbH) |
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Automated Graphitization Equipment AGE 3 (IonPlus AG) |
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High resolution inductively coupled plasma mass spectrometer with the laser ablation system (ELEMENT-2 (ThermoFinnigan AB) with imput system:
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Isotope ratio mass spectrometers (Thermo Finnigan Delta plus Advantage, Thermo Scientific Delta V Advantage) connected with input devices | |
Gas chromatograph (Trace GC ultra) for δ13C, δ15N ratio analysis of liquid and gaseous samples, sample preparation and measurements of amino and fatty acids |
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Elemental analyzer (Thermo Flash EA 1112) for δ13C, δ15N, δ34S ratio analysis of the solid samples |
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GasBench II (Thermo Scientific) for δ13C and δ18O ratio in carbonates, water, CO2, DIC (dissolved inorganic carbon) | |
TC/EA high temperature conversion elemental analyzer (Thermo Scientific) for δ18O and D/H ratio determination of all organic compounds and water |
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Mössbauer spectrometer (Wissenschaftliche elektronik GMBH)
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Closed cycle helium cryostat (6 – 300 K) |
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Vacuum furnace (300 – 1000 K) |
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Ball-milling equipment
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Software | |
In the Experimental Nuclear Physics Laboratory of CPST the MCNP6, MCNPX, SCALE 6.2, GEANT4 program packages are used for different applications solving tasks of particle interaction with material.
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Fig. a |
Codes of calculation of few body systems: parallel code for calculation of 3-5 particle harmonic oscillator brackets, which is used for description of few fermion systems; and code for parameter calculation of 3-6 nucleon systems. Intended for calculation of binding energies and other parameters of the lightest atomic nuclei.
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Methods |
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Fig. b
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Based on laboratory experiments, the fix-bed column of biosorbent was applied to pre-concentrate plutonium from fresh water basins. This approaching equipment allowed to determine plutonium with lower input of chemical reagents and was labour as well as time consuming. |
Projects 2017-2021
Project: |
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Main project features: |
The pre-disposal management of radioactive waste – (PREDIS) Year: 2020 09 – 2024 08 (ongoing) Client: EU |
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The project targets the development and implementation of activities for pre-disposal treatment of radioactive waste streams other than nuclear fuel and high-level radioactive waste. FTMC participates in: WP 2 Strategic Implementation WP4 Innovations in metallic material treatment and conditioning
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European Joint Resaarch Programme in the managemet and disposal of radiactive waste (EURAD) Year: 2019 06 – 2024 05 (ongoing) Client: EU |
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European collaboration towards safe RWM, including disposal, through the development of a robust and sustained science, technology and knowledge management programme that supports timely implementation of RWM activities and serves to foster mutual understanding and trust between Joint Programme participants. FTMC participates in: WP 3 Cement-Organic-Radionuclide-Interactions (CORI)– WP 8 Spent Fuel Characterization and Evolution Until Disposal (SFC WP 9 Waste management routes in Europe from cradle to grave (ROUTES) WP 10 Uncertainty Management multi-Actor Network (UMAN) |
Coordination and Support Action “Towards a Joint Programming on Radioactive Waste Disposal” (JOPRAD) Year: 2015 11 – 2017 11 Client: EU |
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The overall aims of the JOPRAD are to assess the feasibility and, if appropriate, to generate a proposal for Joint Programming in the field of Radioactive Waste Management and Disposal in Europe. It also includes Research Development & Demonstration (RD&D) activities, with the accompanying Knowledge Management Programme and its “horizontal activities”, namely establishing a state-of-the-knowledge handbook coupled with education, training, strategic studies, guidance, transfer of knowledge to less advanced programmes, as well as dissemination. |
International Project on Irradiated Graphite Processing Approaches (GRAPA) Year: 2016 11 – 2022 11 (ongoing) Client: IAEA |
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The objective of the project is to support Member States in resolving irradiated graphite management up to industrial implementation of processing technologies.
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Assistance to INPP by Technical Support Organisations in the Field of Radiological Characterisation for Block A1 (Reactor and auxiliary systems) Year: 2016 03 – 2018 06 Client: EC, Ignalina NPP |
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The objective of the project is to advance preparations for the dismantling of Block A1 (Unit 1 reactor and related systems) by targeted technical assistance to INPP’s staff.
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Joint Programming on Radioactive Waste Disposal (JOPRAD). Year: 2016 – 2018 Client: Europian Commission |
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The objective of the project is to repare a proposal for the setting up of a “Joint Programming on Radioactive Waste Disposal”, to bring together at the European level, those aspects of R&D activities implemented within national research programmes where synergy from Joint Programming is identified. |
Baltic Region Initiative for Long Lasting InnovAtive Nuclear Technologies (BRILLIANT). Year: 2015 07 – 2018 07 Client: Europian Commission |
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The project aims to provide coordination and support activities in the frame of the nuclear technologies in Baltic region.
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Implantation and analysis of semiconductors structures by high energy ions Year: 2017.07.20-2017.08.21 Client: UAB "Teravil" |
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The aim of the work was to tune some particular parameters (carrier life time etc.) of manufactured complex GaAs structure to desired values , i.e. to perform device parameters tuning after the last stage of its production using specific high energy ions implantation to the exact place inside the GaAs structure. |
Support to State Nuclear Safety Inspectorate (VATESI) in Review of Documents Related to Licensing of Ignalina NPP Decommissioning Activities. Support to the Assessment of Decommissioning of the Ignalina NPP Year: 2009 - 2017 Client: VATESI, Lithuania |
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Support to VATESI in review of documents related to licensing of Ignalina NPP decommissioning activities (Decommissioning Project for INPP Unit 2 Final Shutdown and Defuelling Phase; Ignalina NPP Unit 1 Turbine Hall Equipment Decontamination and Dismantling Basic Design; INPP Boiler House Equipment Dismantling and Decontamination Design Development, Safety Justification Report; New Solid Waste Retrieval Facility (B2) аt Ignalina NPP, Preliminary Safety Assessment Report; Disposal Units for Short-lived Very Low Level Waste, Preliminary Safety Assessment Report; Storage of solid radioactive waste at INPP Buildings 155, 155/1, 157 and 157/1, Safety analysis Report; Interim storage of bituminized radioactive waste at INPP Building 158, Safety analysis Report; Interim Storage Facility for RBMK Spent Nuclear Fuel Assemblies from Ignalina NPP Units 1 and 2 (B1), Preliminary Safety Assessment Report; Buffer storage facility for very low level (VLL) radioactive waste, Safety Analysis Report). |
Project: |
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Main project features: |
Joint Programming on Radioactive Waste Disposal (JOPRAD) Year: 2016 – 2018 Client: Europian Commission |
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The objective of the project is to repare a proposal for the setting up of a “Joint Programming on Radioactive Waste Disposal”, to bring together at the European level, those aspects of R&D activities implemented within national research programmes where synergy from Joint Programming is identified. |
Baltic Region Initiative for Long Lasting InnovAtive Nuclear Technologies (BRILLIANT) Year: 2015 07 – 2018 07 Client: Europian Commission |
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The project aims to provide coordination and support activities in the frame of the nuclear technologies in Baltic region.
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Preparation ofthe report of periodic safety assessment of Maišiagala radioactive waste storage Year: 2015 04 – 2016 10 Client: RATA (radioactive waste management agency), Lithuania |
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Preparation of periodic safety assessment report of Maišiagala RADON type near surface radioative waste storage facility.
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Nuclear Safety Cooperation with the Regulatory Authorities of Brazil (CNEN) Year: 2015 Client: CNEN, Brazil |
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Provision of technical support for the Regulatory Authorities of Brazil (CNEN) in evaluation of radiological inventory for Angra 2 PWR type reactor to obtain source term for accidental releases from Angra 2. |
Support to State Nuclear Safety Inspectorate (VATESI) in Review of Documents Related to Licensing of Ignalina NPP Decommissioning Activities. Support to the Assessment of Decommissioning of the Ignalina NPP Year: 2009 - 2017 Client: VATESI, Lithuania |
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Support to VATESI in review of documents related to licensing of Ignalina NPP decommissioning activities (Decommissioning Project for INPP Unit 2 Final Shutdown and Defuelling Phase; Ignalina NPP Unit 1 Turbine Hall Equipment Decontamination and Dismantling Basic Design; INPP Boiler House Equipment Dismantling and Decontamination Design Development, Safety Justification Report; New Solid Waste Retrieval Facility (B2) аt Ignalina NPP, Preliminary Safety Assessment Report; Disposal Units for Short-lived Very Low Level Waste, Preliminary Safety Assessment Report; Storage of solid radioactive waste at INPP Buildings 155, 155/1, 157 and 157/1, Safety analysis Report; Interim storage of bituminized radioactive waste at INPP Building 158, Safety analysis Report; Interim Storage Facility for RBMK Spent Nuclear Fuel Assemblies from Ignalina NPP Units 1 and 2 (B1), Preliminary Safety Assessment Report; Buffer storage facility for very low level (VLL) radioactive waste, Safety Analysis Report).
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Scientific technical assistance with "Numerical evaluation of response of the neutron probe in geological structure” Year: 2014 Client: UAB „Minijos Nafta” |
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Development of numerical evaluation of neutron sounding response in the geological structures. |
11c. Evaluation of the material backlog and radiological inventory of KNPP Units 1-4 Year: 2012 01 – 2016 09 Client: DP RAO, Bulgaria |
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Provision of technical support for Kozloduy NPP and DP RAO in evaluation of radiological inventory of the Kozloduy Nuclear Power Plant Units 1 to 4 for the decommissioning purposes.
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TACIS, G3.01/06 (GE/RA/02), Transfer of European Regulatory Methodology and Practices to the Nuclear Safety Authority of Georgia. Contract N° 132-897 (Contract between the EC and Riskaudit) Year: 2008 12 – 2009 06 Client: Nuclear Safety Authority of Georgia |
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The aim was to assist for the Nuclear Safety Authority of Georgia in order to improve Georgian Radiation safety laws to correspond the best practice of the European Countries Nuclear Regulatory.
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7th Euroatom Framework Programme, Treatment and Disposal of Irradiated Graphite and Other Carbonaceous Waste (CARBOWASTE) Year: 2008 04 – 2013 03 Client: European Commission |
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CARBOWASTE focuses on treatment and disposal of irradiated graphite and other carbonaceous waste. The further goal of experiments on irradiated nuclear graphite is developing a prototype installation for the decontamination of graphite so the radioactive waste has a lower volume and eventually the graphite can be reused. |
7th Euroatom Framework Programme, Redox Phenomena Controlling Systems (ReCosy) Year: 2008 – 2012 Client: European Commission |
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The aim was the sound understanding of redox phenomena controlling the long-term release/retention of radionuclides in nuclear waste disposal and providing tools to apply the result to Performance Assessment/Safety Case. |
Ion implantation technologies for the optimization of the relaxation time of the charge carries of InGaAs quantum wells Year: 2015.06.23-2015.09.30 Client: UAB „ Ekspla” |
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The passive mode-locking with the nonlinear Kerr effect in an optical fiber when the intensity-dependent change of the polarization state combined with the intra-cavity polarizer acts as an artificial saturable absorber usually is used to achieve generation of ultrashort laser pulses. The reliable self-starting mode-locking can be achieved by introducing a Semiconductor Saturable Absorber Mirrors (SESAM). For operational wavelength of the Yb-doped fiber lasers, a SESAM based on the InxGa1-xAs/GaAs super-lattice saturable absorber and AlAs/GaAs Bragg mirror is a common choice, but its long term reliability is still an unsolved problem. It is possible to control operational parameters (recovery time, saturation fluence, modulation depth, absorption wavelength) of a SESAM by controlling the growth parameters of the semiconductor material and properly choosing the cavity design. Typical carrier recombination time for a bulk semiconductor material is usually up to ns, but for a stable modelocking of a fiber laser it should be reduced down to a few ps. It this work it was done by the H, O, As ions implantation at various energy into InxGa1-xAs quantum well region after the growing process of the complete structure. The influence of the type and energy of the ions on the main parameters dynamics of SESAM structures were revealed and advices for more stable and more effective energy-saving structures production were proposed. |
Implantation and analysis of semiconductors structures by high energy ions Year: 2012.12.17-2013.01.17 Client: UAB "Teravil" |
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Local injection of high energy ions to semiconductors structures at various flows leads to introduction of considerable amount of impurities at high velocity that could imply formation of new material not in thermodynamic equilibrium bypassing normal chemical solubility rules. That provides a possibility to achieve defects just in desired place of the sample and at levels, which are inaccessible by conventional treatment. Therefore, implantation process might be performed to tune properties (e.g., carrier lifetime, breakdown voltages, etc.) of complex semiconductor structures or devices locally and at desired depth after their synthesis is finished. The aim of the work was to tune some particular parameters (carrier life time etc.) of manufactured complex GaAs structure to desired values , i.e. to perform device parameters tuning after the last stage of its production using specific high energy ions implantation to the exact place inside the GaAs structure. To reach this goal, computer simulation of this GaAs structure were implemented to obtain preliminary parameters for ion implantation. Subsequently, ion implantation was performed and GaAs structures properties were modified. After high energy ions implantation wanted parameters of the complete GaAs device were reached and its proper functionality was demonstrated during final test. |
Implantation and analysis of semiconductors structures by high energy ions Year: 2017.07.20-2017.08.21 Client: UAB "Teravil" |
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The aim of the work was to tune some particular parameters (carrier life time etc.) of manufactured complex GaAs structure to desired values , i.e. to perform device parameters tuning after the last stage of its production using specific high energy ions implantation to the exact place inside the GaAs structure. |