More accurate verification of U enrichment and mass in UF6 storage cylinders and of UO2F2 holdup contained in process equipment is needed to improve international safeguards and nuclear material accountancy at uranium enrichment plants. Small UF6 cylinders (1.5” and 5” diameter) are used to store the full range of enrichments from depleted to highly-enriched UF6. For independent verification of...

The aim of this study was to assess the effect of alginate-chitosan microcapsule on viability characteristics of Bacillus subtilis and the ability of B. subtilis/alginate-chitosan microcapsule to remove uranium ion from aqueous solution. The effects of particle size, chitosan molecular weight and inoculum density on viability characteristics were studied using alginate-chitosan microcapsule-imm...

Introduction: Alpha particle emitters are very damaging and harmful when entering into the human body ,if   ingested or inhaled , swallowed or absorbed  into the lungs or bloodstream . Uranium (238U), Radium (226Ra) and Radon (222Rn) are typical alpha-particle emitters. Material and Methods: we measured the level of alpha particles emitted from 222Rn, 226Ra, and 238U in blood samples of 10 can...

The hot, dense nuclear medium created in Gold-Gold collisions at RHIC exhibits strong, anisotropic collective motion, characterized by the elliptic flow coefficient v2. v2 has been extensively studied, and is thought to be related to the initial eccentricity of the colliding system and its resulting density, quantified by 1 S dN dη . Recently, RHIC has begun colliding Uranium ions. Collisions o...

Depleted uranium munitions have been used in recent military operations in both the Gulf and the Balkans and there have been concerns that exposure to depleted uranium may be a cause of 'Gulf War Syndrome' and cancer clusters. We recount the properties of depleted uranium, its military uses and the situations in which personnel may be exposed. Following a review of scientific literature, the he...

In this paper, we used the multiconfiguration Dirac-Fock method to generate theoretical X-ray spectra for Co-, Ni-, Cu-, Zn-, Ga-, Ge-, As-, Se-, Br-, Kr-, and Rb-like uranium ions. Using the distribution of these ions in a laser-produced plasma, for different plasma temperatures, we generate theoretical spectra which are compared to experimental data. PACS. 32.30.Rj – 31.15.A – 32.70.Cs

A novel flow injection method has been developed for the indirect determination of uranium by the on-line reduction and subsequent fluorimetric detection of cerium(III). A sample solution containing uranium(VI), prepared as a sulfuric acid solution, was injected into a sulfuric acid carrier solution and passed through a column packed with metal bismuth to reduce uranium(VI) to uranium(IV). The ...

We show evidence that the primary uranium minerals, uraninite and coffinite, from high-grade ore samples (U3O8N0.3%) in the Wuyiyi, Wuyier, and Wuyisan sandstone-hosted roll-front uranium deposits, Xinjiang, northwestern China were biogenically precipitated and psuedomorphically replace fungi and bacteria. Uranium (VI), which was the sole electron acceptor, was likely to have been enzymically r...

The efficient development of selective materials for the recovery of uranium from nuclear waste and seawater is necessary for their potential application in nuclear fuel and the mitigation of nuclear pollution. In this work, a graphene oxide/amidoxime hydrogel (AGH) exhibits a promising adsorption performance for uranium from various aqueous solutions, including simulated seawater. We show high...

Uranium contamination of groundwater increasingly concerns rural residents depending on home wells for their drinking water in communities where uranium is a source of contamination. Established technologies to clean up contaminated aquifers are ineffective in large contaminated areas or are prohibitively expensive. Permeable reactive barriers (PRBs) are a low-cost alternative to these methods....