Author: G. F. KauffmanPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 20
Book Description
Uranium Hexafluoride Isotopic Measurements Using an Interpolative Method
Author: G. F. KauffmanPublisher:
ISBN:
Category : Mass spectrometry
Languages : en
Pages : 20
Book Description
Procedures for Handling and Analysis of Uranium Hexafluoride: Analysis
Author: U.S. Atomic Energy CommissionPublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 204
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
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
Selected Measurement Methods for Plutonium and Uranium in the Nuclear Fuel Cycle
Author: Clement James RoddenPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 464
Book Description
Nuclear Science Abstracts
Author: Standard Test Method for Isotopic Analysis of Uranium Hexafluoride by Single-Standard Gas Source Mass Spectrometer Method
Author: 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.
U.S. Government Research Reports
Author: Certification of the Uranium Hexafluoride (UF6) Isotopic Composition
Author: Publisher:
ISBN: 9789279401756
Category :
Languages : en
Pages : 82
Book Description
This report describes the re-determination and certification of the IRMM-019 to IRMM-029 series of uranium hexafluoride (UF6) reference materials certified for the uranium isotopic composition. The values were assigned following ISO Guide 34:2009. The IRMM-019 to IRMM-029 series was originally produced and certified in the 1980's-1990's. Since, the materials are stored in monel ampoules. Upon customer request, UF6 gas is distilled from a mother ampoule into a daughter ampoule, the isotopic composition is verified by Gas Source Mass Spectrometry (GSMS) and the daughter ampoule is sent to the customer. For the purpose of this project, the UF6 materials were converted into uranium nitrate solutions to perform the homogeneity and characterisation studies. Between-unit homogeneity was quantified and stability during dispatch and storage were assessed in accordance with ISO Guide 35:2006.^The materials were characterised by Thermal Ionisation Mass Spectrometry (TIMS) using newly established measurement procedures such as the Modified Total Evaporation (MTE) and Double Spike (DS) methods, and with a new set of certified uranium isotope reference materials, which were prepared by gravimetrical mixing of highly enriched 233U, 235U, 236U and 238U oxides or solutions. The results of the characterisation measurements were also confirmed by GSMS measurements using the original UF6 gases. Uncertainties of the certified values were estimated in compliance with the Guide to the Expression of Uncertainty in Measurement (GUM) and include uncertainties related to the characterisation measurements and the homogeneity study. The materials are intended for the calibration of methods, quality control purposes, and the assessment of method performance for isotope mass spectrometry. As with any certified reference material, they can also be used for validation studies.^The CRMs are available in monel ampoules. Based on physical reasons, there is no minimum sample intake to be taken into account.