A5003293743- Nuclear Physics and Applications
- Graphite, nuclear technology, radiation studies
- Nuclear reactor physics and engineering
- Radioactive contamination and transfer
- Radiation Detection and Scintillator Technologies
- Radioactivity and Radon Measurements
- Radiation Shielding Materials Analysis
- Radioactive element chemistry and processing
- Nuclear and radioactivity studies
- Chemical Reactions and Isotopes
- Radiation Dose and Imaging
- Nuclear Materials and Properties
- Geophysical Methods and Applications
- Nuclear materials and radiation effects
- Muon and positron interactions and applications
- Concrete and Cement Materials Research
- Conservation Techniques and Studies
- Medical Imaging Techniques and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Thermodynamic and Structural Properties of Metals and Alloys
- Intermetallics and Advanced Alloy Properties
- Building materials and conservation
- Electrostatics and Colloid Interactions
- Ammonia Synthesis and Nitrogen Reduction
- Thermal and Kinetic Analysis
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2011-2022
HUN-REN Institute for Nuclear Research
2018
Université Grenoble Alpes
2018
Federal Office for the Safety of Nuclear Waste Management
2018
Physical Sciences (United States)
2018
Forschungszentrum Jülich
2018
Ministry of Construction and Physical Planning
2018
Waste Management (United States)
2018
Integrity Systems (United States)
2018
Integrated Systems Solutions (United States)
2018
Concrete of various type have been used extensively for the adequate shielding radiological equipment using X and gamma rays.In its basic form, concrete is composed pieces inert aggregate held together by hardened cement paste.Dierent types with special cements prepared.The linear attenuation coecients conventional supplementary mineral additives (barite witherite) at dierent energies (Co-60: 1.25 MeV, Cs-137: 0.662 Ir-192: 0.37 MeV) in narrow beam conditions measured.This paper includes...
Poly(acrylamide co-acrylic acid) hydrogels were prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using electron beam irradiation the dose range 2.5 kGy to 6 atmospheric conditions at room temperature. The influence absorbed dose, amount cross-linker (trimethylolpropane trimethacrylate) initiator (potassium persulfate) on swelling properties diffusion coefficient network parameters investigated. structure morphology characterized Fourier Transform...
The objective of this article is to study the activities and special characteristics graphite Fluental neutron moderator material in FiR1 TRIGA Mark II type research reactor Finland. Quantifying nuclide vector total decommissioning waste a legal requirement provides input many other aspect project. Because earlier calculations inventories used partially assumed data e.g. compositions, measurement needed validate calculated results. Graphite are especially important long term final disposal...
Abstract Trace impurity patterns are important nuclear forensic signatures in uranium ore concentrates (UOCs) and Certified Reference Materials (CRMs) used to validate the analysis methods employed by end users. Herein, we discuss certification campaign for three new UOC CRMs from National Research Council Canada: UCLO-1 ( https://doi.org/10.4224/crm.2020.uclo-1 ), UCHI-1 https://doi.org/10.4224/crm.2020.uchi-1 UPER-1 https://doi.org/10.4224/crm.2020.uper-1 ). This study involved 15...
Accelerator Mass Spectrometry and Full Combustion method followed by liquid scintillation counting were applied to measure the accumulated <sup>14</sup>C in thermal column of decommissioned VVR-S reactor NIPNE Bucharest.
In this study, data from thirteen laboratories around the world are presented for a successful certification of uranium isotope ratios in ore concentrate (UOC) certified reference materials National Research Council Canada. Different mass spectrometric measurement principles (including SF‐ICP‐MS, quadruple ICP‐MS, TIMS, MC‐ICP‐MS, SIMS and AMS) procedures were employed. general, all sources exhibit good consistency with TIMS MC‐ICP‐MS showing superior performance. The three candidate UOC...
Tritium bonded to electrophilic atoms like O, S, N or halogens can spontaneously exchange places with hydrogen from the water.These tritium species are exchanged even at a very low temperature and have generic name `labile'.In this paper, new facility for removal quantitative determination of labile is shown.The working principle as follows: sources brought in contact protic solvent, leading spontaneous tritium, then obtained tritiated solvent extracted by distillation.The was tested eciency...
The practical implementation of the European Council Directive no. 2013/59/EURATOM in Romania requires reliable indoor measurements radon (222Rn) activity concentration air. In Romania, several Testing Laboratories were designated for and/or air by Romanian National Commission Nuclear Activities Control (CNCAN). calibration instruments used is very important. IFIN-HH, through its Ionizing Radiation Metrology Laboratory (LMRI), performed advanced research field metrology, using standard...
The study was conducted in order to determine the immobilization performance of low-level tritium waste new cement mixtures. grouts analyzed are fine mortars, fluid, self- compacting, with flowability, able fill smallest gaps solid container. curing showed compact and structural integrity without pores cracks, so as ensure radioactive encapsulation.Two types solid/liquid known activity have been prepared: one type containing a hydrophilic compound other hydrophobic compound.The mixed three...
The Tritium Laboratory at Horia Hulubei National Institute for Physics and Nuclear Engineering was initially licensed in 1976 completely refurbished 2011 as a unique isotope laboratory focused on tritium handling processing to conduct variety of scientific experiments. During renovation, different types solid radioactive waste or potential contaminated with were created: bricks, mortars, cements, false ceiling (polyvinyl chloride), linoleum, rubber, etc.In order fulfill all the requirements...
The behaviour of Polytetrauoroethylene (PTFE), NAFION ionomer membranes and VITON uoroelastomer in presence high activity tritiated water (HTO) was analysed.Radiolytic stability the uoropolymersHTO system analysed by: (a) Simulation radiolytic processes by quantum mechanical methods, (b) eects exposure uoropolymers immersed H2O to 60 Co gamma radiation eld, (c) Immersing samples HTO with activity, for dierent time periods.In both cases were characterized FT IR ATR, study emission uoride ions...
ABSTRACT Generally, 14 C is produced in all types of reactors, mainly through neutron-induced reactions with isotopes carbon, nitrogen, and oxygen. These are present the fuel, fuel cladding, coolant, moderator, structural materials reactor. Irradiated graphite contains a range activation products but, from point view geological disposal, another radionuclide which has to be taken into account tritium ( 3 H or T), neutron induced reaction Li(n,α)T. In this study we have investigated release...
Characteristics of FeCrAl alloys family are currently investigated in order to determine their behavior different types environment, erosive and corrosive (solid, liquid or gaseous), at high temperatures (400-1000 • C).The application with a special impact these consists use build structural components nuclear power plant (IV generation) which the cooling medium is made metal very heat transfer capacity (Pb, Pb-Bi, Sn etc).To improve resistance extreme conditions (corrosion, erosion,...
Abstract V Snieckus [Queen's University, Canada]— The Directed Ortho Metalation — Cross Coupling Symbiosis in Aromatic Synthesis . N Geach , GP Randall CJ Winfield [Scynexis, UK]— Isotopically Labelled 4‐Formylimidazole A Studer [Marburg Germany]— New Concepts Tin‐Free Radical Chemistry AC Spivey, C Noban [Imperial College London, UK]. T Jones [Sheffield UK], GJ Ellames Kohler [Sanofi‐Synthélabo, H Wadsworth [Amersham Biosciences, Opportunities for Isotope Labelling via Solid Phase with...
In this paper we propose a quantum mechanical evaluation model for homolytic dissociation energies.Using AM1 and PM3 semi-empirical methods have characterized molecular structures fragments that resulted from the chemical bond dissociation.Total binding energies were determined geometrically optimized of due to breaking bonds, as well transitional states.The reaction enthalpy activation correlated with energies.Accuracy method application elds dierent modalities achieved by intercomparison...