Processing

Please wait...

Settings

Settings

Goto Application

1. US20210304905 - URANIUM-DIOXIDE PELLET FOR NUCLEAR FUEL HAVING IMPROVED NUCLEAR-FISSION-GAS ADSORPTION PROPERTY, AND METHOD OF MANUFACTURING SAME

Office
United States of America
Application Number 17200028
Application Date 12.03.2021
Publication Number 20210304905
Publication Date 30.09.2021
Publication Kind A1
IPC
G21C 3/04
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
G21C 3/62
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements
42Selection of substances for use as reactor fuel
58Solid reactor fuel
62Ceramic fuel
CPC
G21C 21/18
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
21Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
18Manufacture of control elements covered by group G21C7/00
G21C 3/045
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
02Fuel elements
04Constructional details
045Pellets
G21C 3/623
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
3Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
42Selection of substances for use as reactor fuel
58Solid reactor fuel ; Pellets made of fissile material
62Ceramic fuel
623Oxide fuels
Applicants Kwang-young Lim
Kepco Nuclear Fuel Co., Ltd.
Tae-sik Jung
Yeon-su Na
Min-jae Joo
Seung-jae Lee
Yoon-ho Kim
Inventors Kwang-young Lim
Tae-sik Jung
Yeon-su Na
Min-jae Joo
Seung-jae Lee
Yoon-ho Kim
Title
(EN) URANIUM-DIOXIDE PELLET FOR NUCLEAR FUEL HAVING IMPROVED NUCLEAR-FISSION-GAS ADSORPTION PROPERTY, AND METHOD OF MANUFACTURING SAME
Abstract
(EN)

The present disclosure relates to a pellet containing an oxide additive to improve a nuclear-fission-gas-adsorption ability of a uranium-dioxide pellet used as nuclear fuel and increase the grain size thereof, and to a method of manufacturing the same. A La2O3—Al2O3—SiO2 sintering additive is added to uranium dioxide so that mass movement is accelerated due to the liquid phase generated during sintering of the uranium-dioxide pellet, which promotes the growth of grains thereof. Further, since less volatilization occurs during sintering due to the low vapor pressure of the liquid phase, efficient additive performance is exhibited, so the liquid phase surrounding the grain boundary effectively adsorbs cesium, which is a nuclear fission gas.