Accurate and precise measurement of uranium content in uranium trioxide by gravimetry: Comparison with isotope dilution mass spectrometry and its uncertainty estimation

Masahiko Yamamoto; Kazushi Horigome; Takehiko Kuno

doi:10.1016/j.apradiso.2022.110460

Accurate and precise measurement of uranium content in uranium trioxide by gravimetry: Comparison with isotope dilution mass spectrometry and its uncertainty estimation

Appl Radiat Isot. 2022 Dec:190:110460. doi: 10.1016/j.apradiso.2022.110460. Epub 2022 Sep 21.

Authors

Masahiko Yamamoto¹, Kazushi Horigome², Takehiko Kuno²

Affiliations

¹ TRP Decommissioning Center, Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33, Muramatsu, Tokai-mura, Ibaraki, Japan. Electronic address: yamamoto.masahiko@jaea.go.jp.
² TRP Decommissioning Center, Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, 4-33, Muramatsu, Tokai-mura, Ibaraki, Japan.

PMID: 36183662
DOI: 10.1016/j.apradiso.2022.110460

Abstract

Gravimetric measurement of U content in UO₃ with ignition in air has been investigated. The ignition temperature, ignition time and aliquot sample mass are optimized as 900 °C, 60 min, and 1 g, respectively. The method is validated by isotope dilution mass spectrometry (IDMS) with uncertainty estimation. The obtained result by gravimetry is 0.78287 ± 0.00051 g/g (k = 2) and agreed with IDMS value. It has been found that U in UO₃ can be measured accurately and precisely by gravimetry.

Keywords: Gravimetry; IDMS; Reprocessing plant; Uncertainty; Uranium; Uranium trioxide.