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Showing 1 to 15 of 15 for “"Tritiated water"”.
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Investigation of tritium atom exchange in plastic liquid scintillation vials
… is an analyte of interest in many air, soil, and water samples. It has been shown that long term storage and study of tritium samples results in a reduction in tritium activity not attributed to the natural radioactive decay. Several explanations have been offered through past literatures …
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Tritium Plume Dynamics in the Shallow Unsaturated Zone Adjacent to an Arid Waste-Disposal Facility, Amargosa Desert Research Site, Nevada
… in southern Nevada have documented two plumes of tritiated water-vapor (<super>3</super>HHO<sub>g</sub>) adjacent to a closed, commercial low-level radioactive waste disposal facility. Wastes were disposed at the facility from 1962-92. Tritium has moved long distances (> 400 m) through a shallow …
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In-situ monitoring of groundwater radionuclides with emphasis on tritium detection
… emitting radioisotopes from a source of groundwater, with particular emphasis on tritium (3H). This is investigated firstly through an understanding of the challenges of detecting tritiated water, which involves the use of Monte Carlo simulations, numerical analysis and the development of …
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Hydrogen bond reorganization and vibrational relaxation in water studied with ultrafast infrared spectroscopy
Water consists of an extended hydrogen bond network that is constantly evolving. More than just a description of the time averaged structure is necessary to understand any process that occurs in water. In this thesis we study the dynamic regime, which involves fluctuations and rearrangements that …
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Tritium speciation in nuclear decommissioning materials
… It commonly occurs, though not exclusively, as tritiated water (HTO) or organically-bound tritium (OBT) in the environment but may exist as other forms in nuclear-related construction and fabrication materials. During the lifetime of nuclear sites (especially those involving heavy water) tritium …
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Native plants as sentinels of tritium contamination
… of hydrogen, replaces a hydrogen atom in a water molecule and readily migrates through soil. Plant roots coming into contact with soil moisture do not discriminate between tritiated water molecules and dihydrogen water molecules in the uptake process. Plants have the potential to be more …
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Exchange of oxygen and hydrogen isotopes between water and water vapor: Experimental results
… {dollar}\delta{dollar}D, and tritium between water and water vapor was quantified using two methods. The first was quiescent equilibration of water samples having widely contrasting isotopic compositions, surface areas, volumes and temperatures, but similar salinities. Rates of exchange (k) …
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Determinação experimental do coeficiente de reaeração, em rios e canais abertos, com o emprego de traçadores
… work, the reaeration coefficient, K2 in natural waters is determined experimentally using Tsivoglou's radioactive tracer method. The technique employed involves the use of an inert radioactive gas, Kr-85, as a tracer for oxygen, tritiated water, HTO, to correct for dispersion and dilution of …
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The Isotopic Composition of Water Vapor in the Upper Troposphere/Lower Stratosphere Region : Modeling, Analysis and Sampling
The isotopic composition of water vapor in the upper troposphere/lower stratosphere:} Exact knowledge about the isotopic composition of water vapor in the tropopause region and the stratosphere provides important information for the understanding of atmospheric transport and photochemistry. The …
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Low energy photon mimic of the tritium beta decay energy spectrum
… produced via neutron interaction with heavy water (D2O), producing tritiated water (DTO). As a result of this, tritium accounts for roughly a third of all occupational exposures at a CANDU type nuclear power plant. This identifies a need to study the biological effects associated with tritium …
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The Stability and Drug Release Characteristics of Multiple Emulsions
Water-in-oil-in-water (W/O/W) or multiple emulsions have been studied by a number of methods. Bimodal particle size distributions were produced containing oil and multiple droplets. The proportions of these two types of droplets was important as it determined the degree to which the emulsion …
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Organically bound tritium in sediments from the Severn Estuary, UK
… both organically bound tritium (OBT) and tritiated water (HTO) into the Severn estuary since 1981. The OBT component of these discharges results in elevated tritium (3H) activities in the sediments and biota of the estuary. A monthly sampling programme, covering February 2000 to May 2004, …
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Acclimatization physiology in tissue cultured plants
… in these plants. The efficiency of ion and water uptake, and translocation in in vitro and acclimatized tomato plants was assessed using [32P]-orthophosphate and [3H]_ tritiated water. The functional capacity of the root system fOlmed in vitro was established, and assessed following …
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Adsorption of Iodine and Water on Silver-Exchanged Mordenite
… gases including radioactive nuclides namely 3H (tritiated water, H3HO), 129I, 85Kr, 135Xe, and 14C. Due to its high quantity in off-gas streams and long half-life (1.59 million years), 129I removal from the off-gas streams is a significant objective of off-gas treatment. </p> <p>129I retention by …
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Comparison of the Effects of Cobalt-60 [gamma]-Rays and Tritium [beta][superscript -]Particles on Water Radiolysis and Aqueous Solutions and Radiolysis of the Ceric-Cerous Sulfate Dosimeter at Elevated Temperature
… powerful techniques to study the radiolysis of water and the mechanisms underlying this radiolysis. Monte Carlo simulations particularly become important when there are no experimental results available in the literature due, for instance, to the difficulty of performing such experiments. This …