Results 11 to 20 of about 99,879 (261)

Facile Synthesis of Uranium Complexes with a Pendant Borane Lewis Acid and 1,2‐Insertion of CO into a U−N Bond

open access: yesAngewandte Chemie, Volume 134, Issue 51, December 19, 2022., 2022
Reactions between the highly strained uranacycle I with various boranes afford unprecedented uranium complexes bearing either a pendant borate or a pendant borane Lewis acid. The latter promotes the 1,2‐insertion of CO into a UIV‐N bond. Abstract In this contribution, we illustrate uranium complexes bearing a pendant borate (i.e.
Wei Su   +4 more
wiley   +2 more sources

Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals

open access: yesHe jishu, 2022
BackgroundThe main ore-bearing rock of the Husab Uranium Mine in Namibia, southern Africa, is white granite, and the radioactive element thorium content in the ore is high, which has a greater impact on the γ ray logging results.PurposeThis study aims to
HAO Jinlong   +3 more
doaj   +1 more source

About chemical form and binding energy of 14C in irradiated graphite of uranium-graphite nuclear reactors [PDF]

open access: yesNuclear Energy and Technology, 2018
Issues associated with handling irradiated graphite of uranium-graphite nuclear reactors are examined. It is demonstrated that selection of approaches, methods and means for handling irradiated graphite are determined by the form of occurrence and ...
Evgeny V. Bespala   +3 more
doaj   +3 more sources

Determination of Oxygen Isotopic Composition in Barium Sulfate by Online Pyrolysis Method with Nickel-plated Carbon as Reductant

open access: yesYankuang ceshi, 2019
BACKGROUND The oxygen isotopic composition of sulfate radical in mineral or water can be used to identify the source and transformation process. At present, the common method is to convert sulfate radical into barium sulfate and the oxygen isotopic ...
JIN Gui-shan   +6 more
doaj   +1 more source

Indications of sandstone-type uranium mineralization from 3D seismic data: a case study of the Qiharigetu deposit, Erenhot Basin, China

open access: yesJournal of Petroleum Exploration and Production Technology, 2021
The primary exploration objective of Qiharigetu Sandstone-type Uranium (SU) deposit in the Erenhot Basin of China is to understand the stratigraphy, lithology and fault distribution of the target layer.
Qubo Wu, Yucheng Huang
doaj   +1 more source

Parallel groundwater flow simulation method based on a discrete fracture network model

open access: yes地质科技通报, 2023
Objective Groundwater flow in fractured rocks has strong heterogeneity and anisotropy. The discrete fracture network (DFN) method has been internationally considered as one of the most reasonable and effective methods to describe the fracture water ...
Jingbo Zhao   +5 more
doaj   +1 more source

Design and validation of the THMC China-Mock-Up test on buffer material for HLW disposal

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2014
According to the preliminary concept of the high-level radioactive waste (HLW) repository in China, a large-scale mock-up facility, named China-Mock-Up was constructed in the laboratory of Beijing Research Institute of Uranium Geology (BRIUG).
Yuemiao Liu   +7 more
doaj   +1 more source

Potential of application of IRT-T research reactor as the solution of the problem of graphite radwaste disposal [PDF]

open access: yesNuclear Energy and Technology, 2018
Aspects of handling irradiated graphite during decommissioning uranium-graphite reactors (UGR) of different types were investigated. It was demonstrated that handling reactor graphite is complicated by the presence in the composition of graphite of long ...
Alexander Pavliuk   +3 more
doaj   +3 more sources

Study on Influence Factors for Determination of Oxygen Isotopic Composition of Silicates and Oxide Minerals by BrF5 Method

open access: yesYankuang ceshi, 2019
BACKGROUND Reagent purification, sample pretreatment, environmental humidity, reactor cleanliness and experimental quality control are the main influence factors for determination of oxygen isotopic composition of silicates and oxide minerals by BrF5 ...
ZHANG Jian-feng   +8 more
doaj   +1 more source

CO2-Driven Hydraulic Fracturing Trajectories across a Preexisting Fracture

open access: yesGeofluids, 2021
Defining the trajectory of hydraulic fractures crossing bedding planes and other fractures is a significant issue in determining the effectiveness of the stimulation. In this work, a damage evolution law is used to describe the initiation and propagation
Qi Zhang   +6 more
doaj   +1 more source

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