Title:
URANIUM DIOXIDE PELLETS HAVING EXCELLENT FISSION GAS ADSORBING PROPERTY AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/231046
Kind Code:
A1
Abstract:
The present invention relates to pellets containing an oxide additive to promote the size growth of crystal grains of uranium dioxide pellets used as nuclear fuel and increase fission gas adsorbing performance, and to a manufacturing method therefor. The La2O3-Al2O3-SiO2 sintering additive is added to uranium dioxide, so that a liquid generated upon sintering of the uranium dioxide pellets accelerates mass transfer to promote the growth of crystal grains and a low vapor pressure of the liquid results in less volatilization during sintering, and thus the additive can exert efficient performance, and as a result, the liquid enclosing crystal grain boundaries can effectively adsorb the fission gas cesium.
Inventors:
LIM KWANG-YOUNG (KR)
JUNG TAE-SIK (KR)
NA YEON-SOO (KR)
LEE SEUNG-JAE (KR)
YOO JONG-SUNG (KR)
JUNG TAE-SIK (KR)
NA YEON-SOO (KR)
LEE SEUNG-JAE (KR)
YOO JONG-SUNG (KR)
Application Number:
PCT/KR2018/009386
Publication Date:
December 05, 2019
Filing Date:
August 16, 2018
Export Citation:
Assignee:
KEPCO NUCLEAR FUEL CO LTD (KR)
International Classes:
G21C3/62; C01G43/025; G21C21/02
Foreign References:
| JPH0527069A | 1993-02-05 | |||
| KR100521638B1 | 2005-10-13 | |||
| KR20170101083A | 2017-09-05 | |||
| KR20110059231A | 2011-06-02 |
Other References:
ALI R. MASSIH, EFFECTS OF ADDITIVES ON URANIUM DIOXIDE FUEL BEHAVIOR, REPORT NUMBER: 2014:21, January 2014 (2014-01-01), ISSN: 2000-0456, Retrieved from the Internet
Attorney, Agent or Firm:
LEE, Un Cheol (KR)
Download PDF: