Author: David Conrad CampPublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 24
Book Description
On-line Determinations of Uranium and Plutonium Process- and Product-stream Concentrations by Energy-dispersive X-ray Fluorescence Analysis
Author: David Conrad CampPublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 24
Book Description
Nondestructive, Energy-dispersive, X-ray Fluorescence Analysis of Product Stream Concentrations from Reprocessed Nuclear Fuels
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Energy-dispersive x-ray fluorescence analysis (XRFA) can be used to measure nondestructively pure and mixed U/Pu concentrations in process streams and hold tank solutions. The 122-keV gamma ray from 57Co excites the actinide K x rays which are detected by a HPGe detector. A computer- and disk-based analyzer system provides capability for making on-stream analyses, and the noninvasive measurement is easily adapted directly to appropriate sized pipes used in a chemical reprocessing plant. Measurement times depend on concentration and purpose but vary from 100 to 500s for process control of strong to weak solutions. Accountability measurements require better accuracy thus more time; and for solutions containing plutonium, require a measurement of the solution radioactivity made with an automatic shutter that eclipses the two exciting sources. Plutonium isotopic abundances can also be obtained. Concentrations in single or dual element solutions from less than 1 g/l to over 200 g/l are determined to an accuracy of 0.2% after calibration of the system. For mixed solutions the unknown ratio of U to Pu is linearly related to the net U/Pu K x-ray intensities. Concentration values for ratios different than the calibration ratio require only small corrections to the values derived from a calibration polynomial. Minor fission product contamination does not prevent concentration determinations by XRFA. The computer-based system also allows real-time dynamic concentration measurements to be made.
NBS Special Publication
Author: Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 776
Book Description
Nondestructive Energy-dispersive X-ray Fluorescence Analysis of Product-stream Concentrations from Reprocessed LWR Fuels
Author: David Conrad CampPublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 23
Book Description
Transmission-corrected X-ray Fluorescence Analysis of Uranium and Plutonium Solutions Using a Dual Transmission Source
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The energy-dispersive x-ray fluorescence analysis (XRFA) technique has been implemented at several spent nuclear fuel reprocessing facilities for nondestructive measurements of uranium and/or plutonium concentrations in process streams and product storage tanks. An important factor in these quantitative measurements is the absorption of the fluoresced x-rays by the solution matrix, which must be taken into account to accurately quantify the U or Pu concentrations. We describe a new, accurate method using a dual transmission source of Gd-153 and Co-57 to correct for matrix effects. Results of measurements on uranium and plutonium solution standards show the methodology to be better than 0.5%, which includes statistical precision, over the concentration range from 1 to 250 g/l. 5 refs., 4 figs., 3 tabs.
Publications of the National Institute of Standards and Technology ... Catalog
Author: National Institute of Standards and Technology (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 680
Book Description
Energy Research Abstracts
Author: Determination of Uranium and Plutonium in Solution by Energy-dispersive X-ray Fluorescence Analysis
Author: Yuji BabaMeasurement Technology for Safeguards and Materials Control
Author: Thomas R. CanadaPublisher:
ISBN:
Category : Material accountability
Languages : en
Pages : 776
Book Description
Publications
Author: United States. National Bureau of StandardsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 684
Book Description