Abstract: Disclosed is a liquid-phase oxidative decomposition method for radioactively contaminated carbonaceous material, providing a method of oxidizing carbon into a gas in liquid phase to treat radioactively contaminated carbonaceous material. The method comprises the following steps: ball milling a mixture of a molybdenum-containing substance and a carbonaceous material, thermally treating the ball milled mixture, and performing liquid-phase oxidation of the thermally treated mixture. The thermal treatment causes carbon to enter space between molybdenum atoms so as to reduce the particle size of carbon and improve the chemical reactivity of carbon, and an oxidant is then used to oxidize the carbon in the space between molybdenum atoms into a gas in liquid phase, while the molybdenum-containing moiety is converted into a water-soluble substance.
Type:
Grant
Filed:
November 23, 2018
Date of Patent:
February 23, 2021
Assignee:
Institute of Materials, China Academy of Engineering Physics
Inventors:
Min Pang, Peilun Sang, Ning Zeng, Qingkai Zhao, Shun Li
Abstract: The application discloses a preparation method of monocrystal uranium dioxide nuclear fuel pellets, comprising: granulating and pelleting UO2 powder to obtain UO2 pellets; then coating surfaces of the UO2 pellets with monocrystal growth additive micro powder to form core-shell structure particles; and activated-sintering the core-shell structure particles at high temperature, liquefying the monocrystal growth additive on the surface of the core-shell structure particle at high temperature and then diffusing into UO2 pellets, dissolving the UO3 in the liquid monocrystal growth additive, and recrystallizing the UO2 to form the monocrystal UO2 nuclear fuel pellets.
Type:
Grant
Filed:
March 17, 2018
Date of Patent:
June 23, 2020
Assignees:
Institute of Materials, China Academy of Engineering Physics, China Nuclear Power Technology Research Institute Co. Ltd.
Abstract: Aspects of Raman spectrum plane imaging device(s), belonging to the technical field of Raman spectra, are disclosed. In one example, a Raman spectrum plane imaging device may comprise a laser generation apparatus capable of adjusting an output wavelength, a light filtering apparatus, and a planar array detector. Laser light beams emitted by such laser generation apparatus may irradiate on a surface of a sample in a planar illuminating manner. According to systems herein, Raman scattered light generated by the sample under the excitation of the laser light beams is incident on the light filtering apparatus and is imaged on the planar array detector after selectively passing through the light filtering apparatus, to be received by the planar array detector. In some implementations, the light filtering apparatus may comprise an F-P interference device and a band-pass light filter.
Type:
Grant
Filed:
March 19, 2018
Date of Patent:
July 30, 2019
Assignee:
Institute of Materials, China Academy of Engineering Physics
Inventors:
Haibo Li, Wenhua Luo, Gan Li, Yuejiao Gu, Guangfeng Zhang, Pengfei Yang