Published June 2019 | Version v1
Journal article Metadata-only

A method for prompt in situ uranium assay and free acidity determination in uranyl nitrate solutions by density and Raman measurements

Creators

  • 1. International Atomic Energy Agency, Vienna (Austria). Department of Safeguards

Description

A combination of the density and Raman measurements for rapid in situ determination of uranium concentration and free acid molarity in uranyl nitrate solutions is proposed. Laboratory validation and field tests performed using a portable handheld density meter and a handheld Raman spectrometer demonstrated a feasibility of the approach in the range of uranium concentration from 50 to 426 g L-1, and free acid molarity ≤ 3 M. The combined standard uncertainties of the uranium and free acidity determination were found to be 2.4% and 5.7%, respectively. Potentials of the method in safeguards and process control applications are highlighted. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
320
Journal Issue
3
Journal Page Range
p. 775-784
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
50055084
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
DENSITY; IN-SITU PROCESSING; MEASURING METHODS; PH VALUE; RAMAN SPECTROSCOPY; URANYL NITRATES
Descriptors DEC
ACTINIDE COMPOUNDS; LASER SPECTROSCOPY; NITRATES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PROCESSING; SPECTROSCOPY; URANIUM COMPOUNDS; URANYL COMPOUNDS

Optional Information

Notes
37 refs.