Author: V. L. WarrenPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 40
Book Description
Measurement of the Isotopic Enrichment of Uranium by a Direct Comparison Mass Spectrometer Method
Author: V. L. WarrenPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 40
Book Description
An Automatic Mass Spectrometer for Relative Measurements of Uranium Isotopes
Author: A. LangdonUranium Isotope Measurements by Quadrupole ICP-MS for Process Monitoring of Enrichment
Author: RN. BolinPublisher:
ISBN:
Category : Isotope ratio
Languages : en
Pages : 13
Book Description
Historically, uranium isotopic ratio measurements in the nuclear industry have been performed using Thermal Ionization Mass Spectrometry (TIMS); primarily due to the high level of precision that can be achieved. TIMS analysis, however, requires sample purification and intricate sample loading. Quadrupole (low resolution, single detector) inductively coupled plasma -- mass spectrometry, Q-ICP-MS, overcomes these disadvantages and is a cost-effective alternative, i.e., in terms of initial capital, maintenance, and operating costs. This paper presents a simple, single standard approach for measuring uranium isotope content in various solid and liquid nuclear materials along with some comparison data of Q-ICP-MS and TIMS. Intensity ratios of 234U, 235U, 236U, and 238U to total U intensity are produced, providing the enrichment level or percent 235U. A detailed description of the instrument and data collection parameters is also provided. Optimal precision and accuracy are achieved through the use of a single standard which is closely matched to the enrichment and concentration of the samples. Depending upon the standard chosen, enrichments between depleted and 97% can be quantified. Standard deviations for the major uranium isotopes are typically within 0.02 absolute and at least an order of magnitude lower for the minor U isotope abundances.
Measurement of Impurity Effects in the Mass Spectrometer Isotopic Analysis of Uranium Hexafluoride
Author: J. C. HortonPublisher:
ISBN:
Category : Isotopes
Languages : en
Pages : 24
Book Description
Selected Measurement Methods for Plutonium and Uranium in the Nuclear Fuel Cycle
Author: Ralph J. JonesPublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 440
Book Description
The Isotopic Ratio Measurement of Uranium in the Form of Hydrolyzed Uranium Hexafluoride by Inductively Coupled Plasma Multiple Collector Mass Spectrometry
Author: T. HodgsonPublisher:
ISBN:
Category : Analysis of uranium hexafluoride
Languages : en
Pages : 6
Book Description
An inductively coupled plasma-multiple collector-mass spectrometer (ICP-MC-MS) has been used to measure the isotopic composition of uranium in three solutions of uranium hexafluoride. The 235U: 238U ratio of each sample solution ranged from approximately 0.007 to 0.03 to 1.0. The measurements are linear over this range and the precision and accuracy are comparable, if not superior, to that obtained by thermal ionization mass spectrometry (TIMS). However, acceptable isotopic ratio measurement of uranium hexafluoride solutions is not possible by TIMS because the presence of fluoride ions severely limits analytical precision. Hence, the fluoride must be removed prior to analysis. This necessitates a chemical purification stage which adds both time and expense to the measurement process. This study reports direct, high precision, accurate uranium isotope ratio measurements on solutions of uranium hexafluoride. The instrumental time required for the analysis of 15 uranium samples with the ICP-MC-MS totals 135 min. This compares with an estimated time requirement of 600 min by TIMS and a time of 900 min by UF6 gas mass spectrometry.
Mass Spectrometry for Uranium Isotopic Measurements
Author: Charles Dewey TaborPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 54
Book Description
Enriched Uranium Processing
Author: Finis S. PattonPublisher:
ISBN:
Category : Highly enriched uranium
Languages : en
Pages : 302
Book Description
Uranium Hexafluoride Isotopic Measurements Using an Interpolative Method
Author: G. F. KauffmanPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 20
Book Description
Advances in Mass Spectrometry
Author: R. M. ElliottPublisher: Elsevier
ISBN: 1483149447
Category : Science
Languages : en
Pages : 647
Book Description
Advances in Mass Spectrometry, Volume 2 documents the proceedings of a conference on mass spectrometry held in Oxford in September 1961. This compilation is categorized into six major topics — mass spectrometry in research; mass spectrometry of inorganic compounds; instruments and techniques; theory and correlation of mass spectra; mass spectra and analysis; and ionization and dissociation. Under these major topics, parts of the papers discussed include field ionization mass spectroscopy; initial kinetic energy discrimination effects in crossed-field ion sources; mass spectrometric study of CaO and Ta; and spark source mass spectrometry as an analytical technique. The book also covers discussions on initial energy of hydrocarbon fragment ions; determination of the structure of alkaloids by mass spectrometry; and application of a time-of-flight mass spectrometer to the examination of ion-molecule interactions. This volume is a useful reference to students and researchers conducting work on mass spectrometry.