Direct measurement of 235U in spent fuel rods with Gamma-ray mirrors

Direct measurement of plutonium and uranium X-rays and gamma-rays is a highly desirable non-destructive analysis method for the use in reprocessing fuel environments. The high background and intense radiation from spent fuel make direct measurements difficult to implement since the relatively low ac...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2015-12, Vol.777 (C), p.15-19
Main Authors: Ruz, J., Brejnholt, N.F., Alameda, J.B., Decker, T.A., Descalle, M.A., Fernandez-Perea, M., Hill, R.M., Kisner, R.A., Melin, A.M., Patton, B.W., Soufli, R., Ziock, K., Pivovaroff, M.J.
Format: Article
Language:English
Subjects:
Fission
Gamma-ray mirrors
Non-destructive analysis
NUCLEAR FUEL CYCLE AND FUEL MATERIALS
Spent fuel
Uranium quantification
X-ray fluorescence
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Summary:Direct measurement of plutonium and uranium X-rays and gamma-rays is a highly desirable non-destructive analysis method for the use in reprocessing fuel environments. The high background and intense radiation from spent fuel make direct measurements difficult to implement since the relatively low activity of uranium and plutonium is masked by the high activity from fission products. To overcome this problem, we make use of a grazing incidence optic to selectively reflect Kα and Kβ fluorescence of Special Nuclear Materials (SNM) into a high-purity position-sensitive germanium detector and obtain their relative ratios.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2014.12.055