In this study application of modified CANDLE burn-up scheme for medium-sized (800-1500 MWt) long-life Pb-Bi cooled fast reactors with natural uranium as fuel cycle input has been performed. The reactor cores are subdivided into several parts with equal volume in the axial directions. The natural uranium is initially put in region 1, after one cycle of 10 years of burn-up it is shifted to region 2, and 10 years after that it is shifted to region 3. This concept is applied to all regions, i.e. shifted the core of I-th region into I+1 region after the end of 10 years burn-up cycle. The first region 1 is filled by fresh natural uranium fuel. The core radial size is optimised to give maximum power density around 400 W/cc.
Humic acids (HAs) were extracted and characterized from three kinds of uranium-enriched lignites from Yunnan province, China. Batch experiments were used to study the adsorption and desorption behavior of uranium (VI) onto these HAs and a commercial HA. The results showed that the optimum pH level at which all the HAs adsorbed uranium(VI) ranged from 5 to 8. The high uranium content of the HAs was released into the solution at the pH values between 1 and 3; when the HA dosage was 2.5 g L−1, the maximum concentratio...
Campbell Ranch, Nevada Arsenic & Uranium TreatmentIn March 2009, AdEdge Water Technologies was contacted by Indian Health Services to design, manufacture, and start up an arsenic and uranium treatment system for the Campbell Ranch community in Nevada. Arsenic concentrations were approximately 0.023 mg/L and uranium concentrations were 0.047 mg/L, well above the United States Environmental Protection Agency which has maximum contaminant levels of 0.01 mg/L arsenic and 0.03 mg/L uranium.AdEdge designed a dual...
In order to develop an effective and economical method for removing low concentration radioactive wastewater of uranium, the biomass of ‘CMCC(F)-98003’ Aspergillus niger was investigated in a batch system. The maximum uranium adsorption capacity of 12.5 mg g−1 was obtained at the initial uranium concentration of 0.75 mg L−1. The biosorption data on a biomass concentration of 0.029 g L−1 fitted well to the Freundlich isotherm with a correlation coefficient (R2) of 0.987. The calculated thermodynamic parameters...
INFORMATIONCarus Corporation has a long history of developing and providing a variety of permanganate products for chemical oxidation applications. Carus is also a leading provider of phosphate products for sequestration and corrosion control. Phosphates are widely used as water treatment chemicals (dry or liquid solutions) to correct problems resulting from inorganic groundwater contaminants (iron, manganese, calcium, etc.) and also to maintain water quality (inhibit corrosion, scale, biofilm, reduce lead and...
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