Abstract
Assay of L-series of nuclear material solution is useful for determination of amount of nuclear materials and ratio of minor actinide in the materials. The hybrid system of energy dispersive X-ray absorption edge spectrometry, i.e. L-edge densitometry, and X-ray fluorescence spectrometry is one of the analysis methods. The hybrid L-edge/XRF densitometer can be a promising candidate for a portable and compact equipment due to advantage of using low energy X-ray beams without heavy shielding systems and liquid nitrogen cooling compared to hybrid K-edge/XRF densitometer. A prototype of the equipment was evaluated for feasibility ofthe nuclear material assay using a surrogate material (lead) to avoid radiation effects from nuclear materials. The uncertainty of L-edge and XRF characteristics of the sample material and volume effects was discussed in the article.
Highlights
THE low energy X-ray measurement system is intended to be used for on-site analytical measurements of safeguards in various nuclear facilities, such as nuclear fuel fabrication facilities and reprocessing plants
The L-edge densitometer is appropriate for a portable equipment for on-site nuclear material inspection and safeguards at facility sites
We verified that the system has feasibility of determination of the concentration of nuclear material from analysis of a surrogate material such as lead nitrate (Pb(NO3)2) solution prior to the work of actinide-bearing materials
Summary
THE low energy X-ray measurement system is intended to be used for on-site analytical measurements of safeguards in various nuclear facilities, such as nuclear fuel fabrication facilities and reprocessing plants. The hybrid system of X-ray absorption spectrometry, such as L-edge densitometry (LED) [1, 2], and X-ray fluorescence spectrometry (XRF), has an important role of safeguards for nuclear facilities. LED is a technique of determination of uranium concentration as a continuous X-ray energy beams transmit a uranium liquid sample. The L-edge densitometer is appropriate for a portable equipment for on-site nuclear material inspection and safeguards at facility sites.
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