NO-analyzer Articles
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FIELD PORTABLE X-RAY FLUORESCENCE SPECTROMETRY FOR THE DETERMINATION OF ELEMENTAL CONCENTRATIONS IN SOIL AND SEDIMENT
The FPXRF technologies described in this method use sealed radioisotope sources to irradiate samples with x-rays. X-ray tubes are used to irradiate samples in the laboratory and are beginning to be incorporated into field portable instruments. When a sample is irradiated with xrays, the source x-rays may undergo either scattering or absorption by sample atoms. This later process is known as ...
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CEA LASE laboratory uses Kartotrak to map radionuclides difficult to measure
Problematics The autoradiography technique consists in depositing sensitive screens collecting the radiation on facility floors, ceilings or walls during different exposure times Screens are then scanned to produce 2D black and white tiff images with a resolution of a few microns. Color contrasts correspond to different values of radioactivity: The tiff images are processed by in-house ...
By Geovariances
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Plutonium decontamination using CBI DeconGel 1101 in highly contaminated and unique areas at LLNL
A highly contaminated glove-box at LLNL containing plutonium was decontaminated using a strippable decontamination gel. 6 x 12 inch quadrants were mapped out on each of the surfaces. The gel was applied to various surfaces inside the glove-box and was allowed to cure. The radioactivity in each quadrant was measured using a LLNL Blue Alpha meter with a 1.5 inch standoff distance. The results ...
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Using SIMS to Determine Isotopic Compositions
Isotopic composition refers to how many different isotopes of an element are present and presented by highlighting the abundance of each isotope in atom percentage (%). This percentage indicates how many atoms in a sample are a specific isotope from all possible atoms in one element. Understanding isotopic composition is essential for many applications across the science and engineering ...
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Identification and accumulation of aromatic sensitizers in fish from paper recycling in Japan
Aromatic sensitizers and related compounds (SRCs) originating from thermal recording material as impurities in waste paper have been detected in aquatic environments near cities where the paper industry is flourishing. In the present study, the levels of exposure to such SRCs and the stable isotope ratios (δ13C and δ15N) in different fish species (Konosirus punctatus, Takifugu niphobles, and ...
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Quantifying the anthropogenic fraction of fatty alcohols in a terrestrial environment
Fatty alcohols are naturally produced hydrocarbons present in all living organisms. They are also used in detergent and cosmetic formulations, may be sourced from either petroleum or biological materials, and are typically disposed of down the drain. This study was conducted on the Luray catchment, Virginia, USA, where sales data indicate that approximately 2 kg of fatty alcohols from detergent ...
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ANSI N13.1-2011 Stack Sampling Considerations
Background Nuclear facilities are required to follow industry standards for sampling stack effluents. Exposure of the general public to released radionuclides must be monitored as specified in US governmental regulations. The United States Environmental Protection Agency (USEPA) and the United States Nuclear Regulatory Commission (USNRC) have the authority over the monitoring of these releases. ...
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