Role of energetic tritium chemistry on developing thermonuclear fusion reactors

被引：9
|
作者：
Okuno, Kenji [1 ]
Kobayashi, Makoto [1 ]
Kurata, Rie [1 ]
Oya, Yasuhisa [1 ]
机构：
[1] Shizuoka Univ, Fac Sci, Radiosci Res Lab, Suruga Ku, Shizuoka 4228529, Japan
来源：
FUSION ENGINEERING AND DESIGN | 2011年 / 86卷 / 9-11期
关键词：
Tritium; Irradiation defects; Migration process; Lithium oxides; Thermal annealing; RELEASE BEHAVIOR; IRRADIATION; DEFECTS; DAMAGES; LI4SIO4; LI2O;
D O I：
10.1016/j.fusengdes.2011.04.014
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：
The reaction kinetics of the two conversion processes for the chemical state of tritium in neutron irradiated Li(2)O during the thermal annealing was investigated. The chemical states of tritium were T(-) state and T(+) state. The abundance of T(-) state was increased in the temperature region of 400-500 K (Conversion I) and it was decreased above 500 K (Conversion II). These kinetic constants were determined. The kinetics of Conversion I and Conversion II was determined to be 7.79 exp(0.45 +/- 0.04 eV/kT)s(-1) and 8.53 x 10(4) exp(0.90 +/- 0.08 eV/kT)s(-1), respectively. The annealing kinetics of irradiation defects of F-centers (oxygen vacancy occupied by one electron), which was a major defect in neutron-irradiated Li(2)O, was also studied. Based on those experimental results, a comprehensive migration model for energetic tritium produced in lithium oxides including the dynamics of irradiation defects was proposed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2358 / 2361
页数：4
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