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Report No.

Preparation and evaluation of reference materials for accountancy analysis, 1; Preparation and evaluation method

Sumi, Mika; Abe, Katsuo; Kageyama, Tomio ; Nakazawa, Hiroaki; Takamatsu, Mai*; Katchi, Tomokazu*; Murakami, Yoshiki*; Ai, Hironobu*

Isotope dilution mass spectrometry method used for the accountancy analysis at nuclear fuel facilities requires the standard materials called LSD(Large Size Dried) spike. Generally, LSD spikes are prepared from certified reference materials which supplied from foreign countries. However, the difficulty of Pu reference material importation is increasing. It is important for safeguard to attain and continue highly reliable accountancy analysis and stable securing of LSD spike is essential. Therefore, under collaboration work between JAEA and JNFL, several types of LSD spike were prepared. Measurement experiments with actual samples were performed and those results were compared with the results obtained using LSD spike which supplied from foreign laboratory. This report presents preparation of LSD spikes, determination of value of plutonium which separated and purified from MOX and used as raw material, practical test and evaluation method of uncertainty based on ISO-GUM.



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