Certification of uranium hexafluoride reference materials for isotopic composition

Mialle, S.; Stephan, Richter; Hennessy, Carmel; Jan, Truyens; Jacobsson, Ulf; Yetunde, Aregbe

doi:10.1007/s10967-014-3843-1

Cited by 15 publications

(13 citation statements)

References 17 publications

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“…Experimental details pertaining to the analytical methods TE [3,6,7,9], MTE [3,4,6,7,[12][13][14], and conventional [3,7,12] are available in the literature and will not be repeated here for brevity. All data presented here were obtained using the Thermo Fisher TRITON TM MC-TIMS instrument using the double filament geometry.…”

Section: Methodsmentioning

confidence: 99%

“…For isotope ratio measurements, systematic biases due to matrix effects are well documented in literature [2]. TIMS measurements are less susceptible to such biases and therefore have been more widely applied to certification measurements of isotopic CRMs [3][4][5][6][7][8]. Most commonly used TIMS analytical methods are total evaporation (TE), modified total evaporation (MTE), and conventional analyses.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of mass spectrometric methods (TE, MTE and conventional) for uranium isotope ratio measurements

Mathew

Haoszbek

2015

J Radioanal Nucl Chem

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The isotope ratio measurement techniquestotal evaporation (TE), modified total evaporation (MTE), and conventional-used for characterization measurements of certified reference materials by thermal ionization mass spectrometer instruments are compared. The advantages of each method, the fractionation profiles resulting from the measurement techniques, and factors affecting systematic components of bias in the isotope ratio measurements are discussed. The TE and MTE techniques yield major ratios and the conventional and MTE techniques yield minor ratios of comparable quality (in terms of precision and accuracy).

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of mass spectrometric methods (TE, MTE and conventional) for uranium isotope ratio measurements

Mathew

Haoszbek

2015

J Radioanal Nucl Chem

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“…COMPUCEA [5,6] is a radiometric technique and serves as a benchmark for on-site U enrichment assay. Evaluated mass spectrometric techniques include: gas source mass spectrometry (GSMS) [9], thermal ionization mass spectrometry (TIMS) [10], inductively coupled plasma mass spectrometry (ICP-MS) [10,11], multi-photon ionization mass spectrometry [12,13], UF 6 molecular mass spectrometry with portable mass spectrometer [14], laser ionization mass spectrometry [15], surface-enhanced laser desorption and ionization (SELDI) [3], liquid sampling-atmospheric pressure glow discharge mass spectrometry (LS-APGD-MS) [16][17][18], and atmospheric-pressure solution-cathode glow-discharge mass spectrometry (AP-SCGD-MS) [19]. Techniques based on optical spectrometric principles include: optical atomic emission with argon afterglow discharge or ICP [20][21][22], glow discharge optogalvanic spectroscopy (GD-OGS) [23], laser ablation-diode laser-laser induced fluorescence (LA-DL-LIF) [24], laser ablation absorbance ratio spectrometry (LAARS) [25,26], atomic beam tunable diode laser (DL) absorption [27], tunable laser infrared (IR) absorption [28,29] and its high performance version with quantum cascade laser [30], and laser induced spectrochemical assay for uranium enrichment (LISA-UE).…”

Section: Methodsmentioning

confidence: 99%

Scoping study to expedite development of a field deployable and portable instrument for UF6 enrichment assay

Chan¹,

Valentine²,

Russo³

2017

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The primary objective of the present study is to identity the most promising, viable technologies that are likely to culminate in an expedited development of the next-generation, field-deployable instrument for providing rapid, accurate, and precise enrichment assay of uranium hexafluoride (UF 6 ). UF 6 is typically involved, and is arguably the most important uranium compound, in uranium enrichment processes. As the first line of defense against proliferation, accurate analytical techniques to determine the uranium isotopic distribution in UF 6 are critical for materials verification, accounting, and safeguards at enrichment plants. As nuclear fuel cycle technology becomes more prevalent around the world, international nuclear safeguards and interest in UF 6 enrichment assay has been growing.At present, laboratory-based mass spectrometry (MS), which offers the highest attainable analytical accuracy and precision, is the technique of choice for the analysis of stable and longlived isotopes. Currently, the International Atomic Energy Agency (IAEA) monitors the production of enriched UF 6 at declared facilities by collecting a small amount (between 1 to 10 g) of gaseous UF 6 into a sample bottle, which is then shipped under chain of custody to a central laboratory (IAEA's Nuclear Materials Analysis Laboratory) for high-precision isotopic assay by MS. The logistics are cumbersome and new shipping regulations are making it more difficult to transport UF 6 . Furthermore, the analysis is costly, and results are not available for some time after sample collection. Hence, the IAEA is challenged to develop effective safeguards approaches at enrichment plants. In-field isotopic analysis of UF 6 has the potential to substantially reduce the time, logistics and expense of sample handling. However, current laboratory-based MS techniques require too much infrastructure and operator expertise for field deployment and operation. As outlined in the IAEA Department of Safeguards Long-Term R&D Plan, 2012-2023, one of the IAEA long-term R&D needs is to "develop tools and techniques to enable timely, potentially real-time, detection of HEU (Highly Enriched Uranium) production in LEU (Lowly Enriched Uranium) enrichment facilities" (Milestone 5.2). iv measurements that do not require the stated high accuracy or precision of the ITVs to which it was compared).The list presented below summarizes the outcome of the present study, and groups all reviewed techniques into "recommended", "promising", or "not recommended"; the "benchmark" techniques are also included and labeled as such. The list is presented in a highly abridged way such that only the final recommendations are given. The performance of a technique in the seven evaluation metrics and its ranking are summarized in Table 6.1, whereas short discussion and comments on the recommendation can be found in Section 6.2 of this report. Furthermore, comprehensive and in-depth reviews on the scientific principle of each technique, its instrument option, its limitations and main gaps betwe...

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“…Furthermore, the IRMM‐019 to IRMM‐029 series of uranium hexafluoride materials was certified for the isotopic composition, because in nuclear safeguards, suitable certified reference materials (CRMs) are needed to validate measurement procedures and to calibrate instruments (Mialle et al . ).…”

Section: Scientific Journals From Which Relevant Articles Were Reviewedmentioning

confidence: 97%

“…The latter is a primary method of measurement and therefore gives results with the highest level of confidence (ISO guide 35, 2006). Furthermore, the IRMM-019 to IRMM-029 series of uranium hexafluoride materials was certified for the isotopic composition, because in nuclear safeguards, suitable certified reference materials (CRMs) are needed to validate measurement procedures and to calibrate instruments (Mialle et al 2015).…”

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confidence: 99%

Geostandards and Geoanalytical Research Bibliographic Review 2015

Weis

Schwager

Nohl

et al. 2016

Geostandard Geoanalytic Res

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Certification of uranium hexafluoride reference materials for isotopic composition

Cited by 15 publications

References 17 publications

Comparison of mass spectrometric methods (TE, MTE and conventional) for uranium isotope ratio measurements

Comparison of mass spectrometric methods (TE, MTE and conventional) for uranium isotope ratio measurements

Scoping study to expedite development of a field deployable and portable instrument for UF6 enrichment assay

Geostandards and Geoanalytical Research Bibliographic Review 2015

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