A5047962675- Radioactive contamination and transfer
- Isotope Analysis in Ecology
- Radioactivity and Radon Measurements
- Radiation Detection and Scintillator Technologies
- Fusion materials and technologies
- Groundwater and Isotope Geochemistry
- Chemical Synthesis and Characterization
- Nuclear Physics and Applications
- Hydrogen Storage and Materials
- Marine and environmental studies
- Geology and Paleoclimatology Research
- Radioactive Decay and Measurement Techniques
- Ammonia Synthesis and Nitrogen Reduction
- Ionosphere and magnetosphere dynamics
- Fermentation and Sensory Analysis
- Neutrino Physics Research
- Hydraulic Fracturing and Reservoir Analysis
- Horticultural and Viticultural Research
- Solar and Space Plasma Dynamics
- Muon and positron interactions and applications
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Advanced Chemical Sensor Technologies
- Chemical Reactions and Isotopes
- Graphite, nuclear technology, radiation studies
National Institute for Research and Development of Isotopic and Molecular Technologies
2011-2024
Cryogenic Industries (United States)
2013-2014
University of Arizona
2007
The relationship between the atmospheric concentration of cosmogenic isotopes, change solar activity and hence secondary neutron flux has already been proven. temporal variation most studied isotopes shows a significant anti-correlation with cycles. However, since artificial tritium input to atmosphere due nuclear-weapon tests masked expected variations production rate by three orders magnitude, natural in meteoric precipitation not previously detected. For first time, we provide clear...
We investigated a simple, reliable radiocarbon measurement procedure for water samples using the direct absorption method sample preparation, followed by low-level liquid scintillation spectrometry. This process has involved quantitative evaluation of conversion steps in order to estimate appropriate working parameters. The 14 C activity dissolved inorganic carbon (DIC) several types (ranging from seawater groundwater) been measured, paying attention preparation requirements each type water....
The Lower Danube Basin covers the Romanian-Bulgarian sub-basin downstream from Cazane Gorge and sub-basins of Siret Prut rivers. To extensively survey Romanian nuclear power plant impact on water, tritium radiocarbon baseline values are required. Therefore, reported study tried to establish these based a 2-yr sampling campaign covering 975 km Tulcea. tributaries Cerna, Jiu, Olt, Arges were also included in this study. During campaigns, concentration different locations showed between 7 ± 2.1...
A current concern of researchers from the Experimental Pilot Plant for Tritium and Deuterium Separation (PESTD) within National R&D Institute Cryogenics Isotopic Technologies in Rm. Valcea is solution a combined electrolysis catalytic exchange (CECE) isotopic separation process that aims to be part new liquid waste decontamination technology. The experimental installation, defined as module M1100, has interfaces with PESTD auxiliary systems placed area.The installation its own automation...
In this paper, we investigate a procedure for radiocarbon determination in forest soil and slurry from lake sediments. The total carbon these samples can be both inorganic organic. Inorganic analyzed straightforward manner using the direct absorption method by sample acidification CO 2 capture. For organic carbon, hybrid wet-oxidation of followed absorption. To evaluate processes with potassium dichromate (K Cr O 7 ) permanganate (KMnO 4 ), performed several experiments different quantities...
In order to determine organically bound tritium (OBT) from environmental samples, these must be converted water, measurable by liquid scintillation counting (LSC). For this purpose we conducted some experiments OBT level of a grass sample collected an uncontaminated area. The studied was combusted in Parr bomb. However usual interfering phenomena were identified: color or chemical quench, chemiluminescence, overlap over spectrum because other radionuclides presence as impurities (14C...
The paper presents the results of pre-operational environmental monitoring program for Experimental Pilot Plant Tritium and Deuterium Separation. tritium baseline was established in surface water samples, air, precipitation, crops, fish, meat milk. also summarizes azeotropic distillation procedure used to extract from samples problems encountered during its use.
The hydrogen radioactive isotope, tritium, not only reflects seasonal variation in precipitation but also variations on a local level. To use this radioisotope authentication and geographical indication procedures, the tritium levels vines, grapes, wine were measured two forms: (1) tissue-free water (TFWT), free of plant or aqueous phase wine; (2) organically bound (OBT), organic part (as ethanol). This paper presents behavior vines from May to October produced harvested grapes for both...
ABSTRACT The CO 2 absorption and liquid scintillation counting (LSC) are methods used in radioactivity monitoring programs of nuclear facilities for 14 C measurements due to high number samples relatively expected level concentration. paper describes the chemical sample preparation applied a quality control material (IAEA-C3 Cellulose), order evaluate reproducibility method this type material. Consequently, experiments we two home-made cocktails, containing amines, 2-methoxyethylamine (MEA)...
ABSTRACT This paper presents radiocarbon ( 14 C) variations in the atmosphere from Ramnicu Valcea, Romania. The samples were collected vicinity of Experimental Pilot Plant for Tritium and Deuterium Separation (PESTD) Institute Cryogenics Isotopic Technologies (ICSI) placed about 10 km south Valcea city (Romania), Govora industrial area. facility is an experimental project national nuclear energy research program, which has aim developing technologies tritium separation heavy water. It should...
Following tritium concentration records in precipitation for the period 1999-2013 and behaviour during this Ramnicu Valcea (Rm. Valcea) location, level of individual precipitations late spring summer 2009-2013 was investigated. Despite good correlation between monthly mean concentrations over 15-year observations (Pearson coefficient 0.87), had no linear amount precipitation.
AbstractThe electrolysis process is essential in the water detritiation subsystem using combined electrolytic catalytic exchange process. A special experimental program was designed to characterize a modified HOGEN H Series industrial electrolyzer. The tritium amount transferred hydrogen gas, enrichment factor, and number of hours necessary attain steady-state regime were parameters primary interest experiments. To minimize time for regime, holdup electrolyzer chosen as minimum value allowed...
Tritium, the radioactive isotope of hydrogen, is one most versatile radionuclides due to its role as a tracer hydrogen and carbon structures. The liquid scintillation counting method preferred tritium measurement especially in case numerous samples radioactivity monitoring programs. changes that appeared spectrometers market cocktail formula demand adaptation laboratory routine procedure. Tritium level environmental water 2022 presented paper. low around 2 Bq/L imposes necessity enrichment....
AbstractThis paper presents the activity level of total organically bound tritium (OBT) in different plant species, e.g., grains (wheat, corn), trees (apple, fir), and vines, organs plants (buds, leaves, fruits, straw, branches) surrounding Experimental Pilot Plant for Tritium Deuterium Separation during growing seasons 2020 2021, The influence environmental factors over OBT studied species is established by measurements air precipitations their tissue-free water activity.Keywords:...