Effect of diamond additive on the fission gas release in UO2 fuel irradiated to 7.2 GWd/tHM

被引：3
|
作者：
Medvedev, Pavel [1 ]
机构：
[1] Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA
来源：
ANNALS OF NUCLEAR ENERGY | 2020年 / 139卷 / 139期
关键词：
D O I：
10.1016/j.anucene.2019.107282
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
UO2 pellets containing 5 vol% diamond particles were irradiated in the Advanced Test Reactor at an LHGR of up to 310 W/cm to the burnup of 7.2 GWd/tHM. Fission gas release, measured during post-irradiation examination, was determined to be 1.08%. Fission gas release modeling performed using BISON fuel performance code showed that undoped UO2 fuel irradiated under the identical conditions, would have had fission gas release of 9.09%. Noting that diamond has the highest thermal conductivity of any known material, these results suggest that doping with a good thermal conductor is an effective means to reduce fission gas release in UO2 fuels. (C) 2019 Published by Elsevier Ltd.
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