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Title: Determination of thorium, uranium and transuranium isotopes in siliceous and refractory materials by high-resolution alpha spectrometry

Abstract

Samples of siliceous solids up to 1 gram were dissolved completely by fusion with potassium fluoride in platinum dishes in the presence of appropriate isotopic tracers. The fluoride cake was then transposed with concentrated sulfuric acid to a pyrosulfate fusion with simultaneous volatilization of all silica and fluoride. Thorium and the transuranium elements were precipitated isomorphously with barium sulfate. Thorium and transuranium elements were precipitated as hydroxides, filtered on a membrane filter and analyzed in an alpha spectrometer. When much natural thorium-232 was present, the hydroxides were converted to fluorides before analysis by alpha spectrometry. Uranium was precipitated isomorphously with barium sulfate. The uranium was precipitated consecutively as the hydroxide and fluoride for mounting and analysis by alpha spectrometry. The procedure was much simpler and faster than others available. Resolution of the subsequent alpha spectra was comparable to that obtained by electrodeposition. When sufficient activity was present, the results could be reproduced with a relative standard deviation of about 1% for the entire determination. The accuracy of the determination on standards was always as good as the statistical uncertainty of the measurement would permit.

Authors:
;
Publication Date:
Research Org.:
EG and G Idaho, Inc., Idaho Falls, ID (USA)
Sponsoring Org.:
DOE/NE
OSTI Identifier:
5584879
Report Number(s):
EGG-M-88287; CONF-8810112-9
ON: DE90002093; TRN: 91-011069
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Conference
Resource Relation:
Conference: 34. annual conference on bioassay, analytical and environmental radiochemistry, Las Vegas, NV (USA), 17-21 Oct 1988
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; THORIUM; SEPARATION PROCESSES; URANIUM; ALPHA SPECTROSCOPY; BARIUM SULFATES; DISSOLUTION; FLUORIDES; HYDROXIDES; ISOTOPES; MILL TAILINGS; POTASSIUM FLUORIDES; PRECIPITATION; REFRACTORIES; ACTINIDES; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; ELEMENTS; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; METALS; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; SOLID WASTES; SPECTROSCOPY; SULFATES; SULFUR COMPOUNDS; TAILINGS; WASTES; 050400* - Nuclear Fuels- Feed Processing; 400105 - Separation Procedures

Citation Formats

Sill, C W, and Sill, D S. Determination of thorium, uranium and transuranium isotopes in siliceous and refractory materials by high-resolution alpha spectrometry. United States: N. p., 1988. Web.
Sill, C W, & Sill, D S. Determination of thorium, uranium and transuranium isotopes in siliceous and refractory materials by high-resolution alpha spectrometry. United States.
Sill, C W, and Sill, D S. Fri . "Determination of thorium, uranium and transuranium isotopes in siliceous and refractory materials by high-resolution alpha spectrometry". United States.
@article{osti_5584879,
title = {Determination of thorium, uranium and transuranium isotopes in siliceous and refractory materials by high-resolution alpha spectrometry},
author = {Sill, C W and Sill, D S},
abstractNote = {Samples of siliceous solids up to 1 gram were dissolved completely by fusion with potassium fluoride in platinum dishes in the presence of appropriate isotopic tracers. The fluoride cake was then transposed with concentrated sulfuric acid to a pyrosulfate fusion with simultaneous volatilization of all silica and fluoride. Thorium and the transuranium elements were precipitated isomorphously with barium sulfate. Thorium and transuranium elements were precipitated as hydroxides, filtered on a membrane filter and analyzed in an alpha spectrometer. When much natural thorium-232 was present, the hydroxides were converted to fluorides before analysis by alpha spectrometry. Uranium was precipitated isomorphously with barium sulfate. The uranium was precipitated consecutively as the hydroxide and fluoride for mounting and analysis by alpha spectrometry. The procedure was much simpler and faster than others available. Resolution of the subsequent alpha spectra was comparable to that obtained by electrodeposition. When sufficient activity was present, the results could be reproduced with a relative standard deviation of about 1% for the entire determination. The accuracy of the determination on standards was always as good as the statistical uncertainty of the measurement would permit.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Conference:
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