Use of the 1001keV peak of 234mPa daughter of 238U in measurement of uranium concentration by HPGe gamma-ray spectrometry

Yücel, Haluk; Çetiner, M. Atıf; Demirel, H.

doi:10.1016/s0168-9002(98)00562-2

Cited by 57 publications

(8 citation statements)

References 17 publications

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“…The weak intensity of 234m Pa peaks, in conjunction with the low efficiency of germanium detectors at higher energies, often leads to non-detectable count rates for building materials (García-Talavera, 2003). Furthermore, 234m Pa -emission at 766.36 keV (0.323 %) interferes with the -peak generated at 768 keV (4.76 %) by 214 Bi (Yücel et al, 1998). Inasmuch as the 92.6 keV doublet is also a thorium kα 1 X-ray peak, in samples with a high thorium content, this -peak fails to provide an accurate indication of uranium activity concentration because thorium kα 1 X-rays would self-excite (Lau et al, 1982).…”

Section: Cam Filementioning

confidence: 99%

Use of Genie 2000 and Excel VBA to correct for γ-ray interference in the determination of NORM building material activity concentrations

Suárez-Navarro

Gascó

Alonso

et al. 2018

Applied Radiation and Isotopes

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The γ-radiation emitted by building materials is calculated from the activity indices for Th,Ra and K and expressed as the activity concentration index (ACI). Gamma spectroscopy is a non-destructive technique frequently used to simultaneously determine the indices for several radionuclides. Spectral interpretation poses a number of challenges, including identification of γ-lines subject to summing-in effects, interference from other γ-ray emitting radionuclides and the time required to reach secular equilibrium. These challenges are not fully addressed by Canberra Industries' Genie 2000, the software used by many laboratories to analyse samples. This article describes a Microsoft Excel workbook that exploits Genie 2000 flexibility to program applications with Visual Basic using Canberra's Nuclear Data Access Library and batch procedure tools. The workbook determinesK activity concentration after correcting for Ac interference andRa activity directly from the γ-peak at 186.5 keV. The method proposed was tested by participating in 13 national and international scale inter-comparison exercises. The results were statistically indistinguishable from the reference values at a coverage factor of k = 3 and no statistically significant differences were identified between the respective means by a Student's t pairwise comparison.

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Section: Cam Filementioning

confidence: 99%

Use of Genie 2000 and Excel VBA to correct for γ-ray interference in the determination of NORM building material activity concentrations

Suárez-Navarro

Gascó

Alonso

et al. 2018

Applied Radiation and Isotopes

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“…The 1001 keV gamma from Pa-234m is prominent in spectra from soil samples containing DU or NU. Literature has shown the 1001 keV photopeak of Pa-234m to be a reliable method for measuring U in samples (Yücel et al 1998). However, the use of Pa-234m is heavily dependent on the secular equilibrium being maintained with Th-234 and on the secular equilibrium between Th-234 and U-238 also being maintained.…”

Section: Figures and Tablesmentioning

confidence: 99%

Development and characterization of small-scale washing systems for removal of depleted uranium oxides

Unz¹,

McCown²,

Waggoner³

et al. 2018

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Researchers from the Mississippi State University Institute for Clean Energy Technology (MSU-ICET) and the U.S. Army Engineer Research and Development Center (ERDC) have identified procedures and methodologies for identifying leaching solutions to assist in the removal of depleted uranium (DU) oxides from contaminated soils. They developed a benchscale leach system to optimize leaching procedures and methodologies. This study identified that a 2 molar (M) acetic-acid solution with a 15% (v/v) 0.3 M hydroxylamine hydrochloride solution could remove approximately 70% of the uranium in the soil sample. Pretreating the soil with 3 M hydrochloric acid improved leaching efficiency to approximately 90%. The MSU-ICET research team developed the preliminary design of a mobile leaching system based on the hydrochloric-acid pretreatment followed by 2 M acetic acid / 15% (v/v) 0.3 M hydroxylamine hydrochloride leaching method. The trailer heap leach system is designed to be used on-site, eliminating the need for additional transport of radioactive, contaminated soils. This will reduce the risk of radioactive exposure for personnel and will eliminate potentially serious transportation accidents. DISCLAIMER:The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. DISCLAIMER:The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

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“…Generally, the uranium enrichment factor can be obtained relatively accurately by gamma-ray spectrometry [15][16][17][18]. The shape and size of uranium components are a sensitive determiner of the inner structure and design level of a nuclear warhead, but they are not allowed to be measured in many situations.…”

Section: Simulation and Analysis Of 90% Uranium Componentsmentioning

confidence: 99%

Uranium mass and neutron multiplication factor estimates from time-correlation coincidence counts

Xie

Zhu

2015

Nuclear Instruments and Methods in Physics Research Section A:

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Use of the 1001keV peak of 234mPa daughter of 238U in measurement of uranium concentration by HPGe gamma-ray spectrometry

Cited by 57 publications

References 17 publications

Use of Genie 2000 and Excel VBA to correct for γ-ray interference in the determination of NORM building material activity concentrations

Use of Genie 2000 and Excel VBA to correct for γ-ray interference in the determination of NORM building material activity concentrations

Development and characterization of small-scale washing systems for removal of depleted uranium oxides

Uranium mass and neutron multiplication factor estimates from time-correlation coincidence counts

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