The effect of high fluence neutron irradiation on the properties of a fine-grained isotropic nuclear graphite

被引：90

作者：

Ishiyama, S ^{[1
]}

Burchell, TD ^{[1
]}

Strizak, JP ^{[1
]}

Eto, M ^{[1
]}

机构：

[1] JAPAN ATOM ENERGY INST,DEPT HIGH TEMP ENGN,TOKAI,IBARAKI 31911,JAPAN

来源：

JOURNAL OF NUCLEAR MATERIALS | 1996年 / 230卷 / 01期

关键词：

D O I：

10.1016/0022-3115(96)00005-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A fine-grained isotropic nuclear graphite (IG-110), manufactured from a petroleum coke, was irradiated to a total neutron dose of 3.8 x 10(26) n/m(2) or 25 displacements per atom (dpa) at 600 degrees C in the high flux isotope reactor (HFIR) at Oak Ridge National Laboratory (ORNL). The effect of irradiation and the influence of post-irradiation thermal annealing on the properties of the graphite were evaluated. Volume change turnaround was clearly observed at 15-20 dpa and the return to original volume (Delta V/V-0 = 0) can be estimated to occur at similar to 30 dpa. Strength and elastic moduli of the irradiated graphite increased by a factor of 2-3, and maximums in the sigma/sigma(0), and E/E(0) curves were at similar to 20 dpa at 600 degrees C. Recovery of volume, fracture strength and thermal conductivity by thermal annealing were found, and thermal conductivity returned to better than about 30% of the unirradiated value after 1200 degrees C thermal annealing.

引用

页码：1 / 7

页数：7