Journal ArticleDOI
Measurement of63Ni in highly radioactive Hanford waste by liquid scintillation counting
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TLDR
In this paper, a method for determining high-activity radioactive waste stored in underground tanks at Hanford requires determining 63Ni (100 y), a low-energy β-emitter (Emax 67 keV).Abstract:
Characterization of high-activity radioactive waste stored in underground tanks at Hanford requires determining63Ni (100 y). This low-energy β-emitter (Emax 67 keV) must be separated with a high degree of radiochemical purity large amounts of other fission and activation products. The method to be discussed involves multiple precipitation steps with several holdback carriers added, followed by precipitations with dimethylglyoxime, ion exchange, and electrodeposition. The59Ni activity is determined by low-energy photon spectrometry. The sample is then stripped from the counting disk with HNO3, converted to the chloride form, and the63Ni β-spectrum is measured with high efficiency by liquid scintillation counting.read more
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Book ChapterDOI
Environmental liquid scintillation analysis
TL;DR: In this article, the authors present the principles of liquid scintillation counting (LSC) measurement techniques and focus on the practical issues in the LSC determination of environmental radionuclides, as well as the status of the present research progress in these aspects.
Journal ArticleDOI
A comparative study using liquid scintillation counting to determine 63Ni in low and intermediate level radioactive waste
TL;DR: In this paper, a comparative study using liquid scintillation counting was performed to measure 63Ni in low and intermediate level radioactive waste, three DMG-based radiochemical procedures (solvent extraction, precipitation, extraction chromatography) were investigated, the solvent extraction method being considered as the reference method.
Journal ArticleDOI
Rapid separation of nickel for 59 Ni and 63 Ni activity measurement in radioactive waste samples
TL;DR: In this paper, a peristaltic pump with sixteen channels and the same number of Ni-Resin columns was constructed for the quantification of Ni and 63Ni in radioactive wastes discharged from nuclear power plants and various research activities related to the nuclear fuel cycle.
Journal ArticleDOI
Separation of 99 Tc, 90 Sr, 59,63 Ni, 55 Fe and 94 Nb from activated carbon and stainless steel waste samples
TL;DR: In this paper, a suquential procedure for separation of nuclides such as 55Fe, 94Nb, 59,63Ni, 90Sr, and 99Tc from activated carbon and stainless steel samples orignating from low and intermediate level of radioactive waste.
Journal ArticleDOI
Radiochemical procedure and quantitative determination of the activation product, 63Ni, in environmental soft water samples with high Ca and Mg phosphate concentration
TL;DR: In this article, a new step is added to eliminate high quantities of calcium and magnesium phosphate disturbing the iron hydroxide precipitation step, which has been applied to soft water samples: sediments, plants and fishes.
References
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Journal ArticleDOI
Method for separation and measurement of nickel-63 in environmental samples
TL;DR: The method used involves anion exchange, precipitation of the Ni as Ni-dimethyl glyoxime complex, and a gel scintillation counting technique for $sup 63$Ni measurement.