Primary studies on particle recovery of swipe samples for nuclear safeguards

Wang, Fan; Chen, Yan; Zhao, Yuqing; Zhang, Yan; Tongxing, Wang; Jinghuai, Li; Chang, Ziwei; Hai-ping, Cui

doi:10.1007/s10967-013-2575-y

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…In laboratory analysis, aerosol cakes can be collected on filter paper and then disaggregated using ultrasonic vibration (Wang et al 2013). Identification of uraniumbearing particles from background is efficiently carried out using neutron-induced fission-track analysis.…”

Section: Conversionmentioning

confidence: 99%

Environmental Detection of Clandestine Nuclear Weapon Programs

Kemp

2016

Annu. Rev. Earth Planet. Sci.

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Environmental sensing of nuclear activities has the potential to detect nuclear weapon programs at early stages, deter nuclear proliferation, and help verify nuclear accords. However, no robust system of detection has been deployed to date. This can be variously attributed to high costs, technical limitations in detector technology, simple countermeasures, and uncertainty about the magnitude or behavior of potential signals. In this article, current capabilities and promising opportunities are reviewed. Systematic research in a variety of areas could improve prospects for detecting covert nuclear programs, although the potential for countermeasures suggests long-term verification of nuclear agreements will need to rely on methods other than environmental sensing.

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Section: Conversionmentioning

confidence: 99%

Environmental Detection of Clandestine Nuclear Weapon Programs

Kemp

2016

Annu. Rev. Earth Planet. Sci.

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“…Among the available techniques, vacuum impactors and vacuum filtration are the most commonly used. [36][37] In the vacuum impaction method, the collection of particles can be performed on a graphite planchet for subsequent SIMS analysis, while the vacuum filtration system is equipped with a membrane filter for use in fission track thermal ionization mass spectrometry (FT-TIMS). In particle analysis, the pre-screening process is required to pinpoint the existence and location of target nuclear materials.…”

Section: Particle Analysismentioning

confidence: 99%

Recent Developments in Nuclear Forensic and Nuclear Safeguards Analysis Using Mass Spectrometry

Song¹,

Park²,

Lee³

et al. 2016

Mass Spectrometry Letters

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The analysis of nuclear materials and environmental samples is an important issue in nuclear safeguards and nuclear forensics. An analysis technique for safeguard samples has been developed for the detection of undeclared nuclear activities and verification of declared nuclear activities, while nuclear forensics has been developed to trace the origins and intended use of illicitly trafficked nuclear or radioactive materials. In these two analytical techniques, mass spectrometry has played an important role in determining the isotope ratio of various nuclides, contents of trace elements, and production dates. These two techniques typically use similar analytical instruments, but the analytical procedure and the interpretation of analytical results differ depending on the analytical purpose. The isotopic ratio of the samples is considered the most important result in an environmental sample analysis, while age dating and impurity analysis may also be important for nuclear forensics. In this review, important aspects of these techniques are compared and the role of mass spectrometry, along with recent progress in related technologies, are discussed.

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“…Established technologies for U detection have limitations that hinder wide area in situ monitoring. Typically, environmental U detection involves in-field sample collection (e.g., from a pumped or bailed water sample)), followed by sample preparation and analytical quantification in the laboratory using mass spectrometry (e.g., ICP-MS, SIMS, FT-TIMs) . While sensitive and selective, these technologies are equipment-intensive, costly, require skillful operation, and cannot be easily applied for in situ sampling, greatly limiting sampling throughput.…”

Section: Introductionmentioning

confidence: 99%

Combinatorial Sensor Design in Caulobacter crescentus for Selective Environmental Uranium Detection

Park

Taffet

2019

ACS Synth. Biol.

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The ability to detect uranium (U) through environmental monitoring is of critical importance for informing water resource protection and nonproliferation efforts. While technologies exist for environmental U detection, wide-area environmental monitoring, i.e. sampling coverage over large areas not known to possess U contamination, remains a challenging prospect that necessitates the development of novel detection approaches. Herein, we describe the development of a whole-cell U sensor by integrating two functionally independent, native U-responsive two-component signaling systems (TCS), UzcRS and UrpRS, within an AND gate circuit in the bacterium Caulobacter crescentus. Through leverage of the distinct but imperfect selectivity profiles of both TCS, this combinatorial approach enabled greater selectivity relative to a prior biosensor developed with UzcRS alone; no cross-reactivity was observed with most common environmental metals (e.g, Fe, As, Cu, Ca, Mg, Cd, Cr, Al) or the U decay-chain product Th, and the selectivity against Zn and Pb was significantly improved. In addition, integration of the UzcRS signal amplifier protein UzcY within the AND gate circuit further enhanced overall sensitivity and selectivity for U. The functionality of the sensor in an environmental context was confirmed by detection of U concentrations as low as 1 μM in groundwater samples. The results highlight the value of a combinatorial approach for constructing whole-cell sensors for the selective detection of analytes for which there are no known evolved regulators.

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Primary studies on particle recovery of swipe samples for nuclear safeguards

Cited by 6 publications

References 3 publications

Environmental Detection of Clandestine Nuclear Weapon Programs

Environmental Detection of Clandestine Nuclear Weapon Programs

Recent Developments in Nuclear Forensic and Nuclear Safeguards Analysis Using Mass Spectrometry

Combinatorial Sensor Design in Caulobacter crescentus for Selective Environmental Uranium Detection

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