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Sumi, Mika; Takamatsu, Mai*; Ebisawa, Noriyuki; Abe, Katsuo; Kageyama, Tomio; Chiba, Masahiko; Nakazawa, Hiroaki; Suzuki, Toru; Katchi, Tomokazu*; Kushigeta, Yoshiyuki*; et al.
no journal, ,
Standard material which called Large Size Dried (LSD) spikes is required for Plutonium and Uranium measurement by Isotope Dilution Mass Spectrometry (IDMS). Collaboration work between JAEA and JNFL is performed to validate efficient use of standard material (primary) and to evaluate the effectivity of the Pu which separated and purified from MOX stored at JAEA. According to the presentation "Preparation and evaluation of reference materials (LSD spikes) (1) Preparation and testing", uncertainty of the actual sample measurements at Rokkasho Reprocessing plant are evaluated with GUM. Also, the effectivity of the half sized LSD spikes from generally used at JAEA and LSD spikes which prepared from Pu purified from MOX at JAEA are statistically evaluated and validated.
Katchi, Tomokazu*; Kushigeta, Yoshiyuki*; Murakami, Yoshiki*; Hishi, Tomoyuki*; Ai, Hironobu*; Takamatsu, Mai*; Ebisawa, Noriyuki; Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; et al.
no journal, ,
Standard material which called Large Size Dried (LSD) spikes is required for Plutonium and Uranium measurement by Isotope Dilution Mass Spectrometry (IDMS). Collaboration work between JAEA and JNFL is performed to validate efficient use of standard material (primary) and to evaluate the effectivity of the Pu which separated and purified from MOX stored at JAEA. Preparation of the LSD spikes at JAEA and evaluation with actual samples with remote operation systems at JNFL will be presented.
Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Takamatsu, Mai*; Katchi, Tomokazu*; Murakami, Yoshiki*; Ai, Hironobu*
no journal, ,
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.
Sumi, Mika; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki; Takamatsu, Mai*; Katchi, Tomokazu*; Murakami, Yoshiki*; Ai, Hironobu*
no journal, ,
Destructive analysis for accountancy at nuclear fuel facilities should attain international target values for measurement uncertainties in safeguarding nuclear materials (ITVs).Since measurement uncertainties of isotope dilution mass spectrometry depend on uncertainties of standard materials (spikes) used, utilizing highly reliable standard material is essential. The LSD spikes prepared under collaboration work with JAEA and JNFL has different Pu/U ratio and smaller nuclear material in a spike compared with the LSD spikes used at safeguard laboratories, and the value of Pu which separated and purified from MOX and used as raw material for one of the LSD spike prepared at JAEA were measured at JAEA. Uncertainties of the prepared LSD spikes and the measurement results of actual samples with these LSD spikes were evaluated based on ISO-GUM and compared with ITVs.
Sumi, Mika; Takamatsu, Mai*; Abe, Katsuo; Kageyama, Tomio; Nakazawa, Hiroaki
no journal, ,
All accountancy analyses at Plutonium Fuel Development Center (PFDC) are performed by isotope dilution mass spectrometry (IDMS) which well-characterized standard materials are required. Since there are no suppliers in Japan, all Pu CRMs are imported while difficulties of Pu transportation are increasing. It is required to secure reference materials for continuing reliable accountancy analysis. Recently, several examinations and tasting were performed at PFDC to save CRMs. Also, Pu was separated and purified from MOX powder (MOX-Pu) stored at PFDC and its potential as standard material has been evaluated. Make up value of MOX-Pu and prepared spikes will be validated by intercomparison including international laboratories.