Influence of high dose neutron irradiation on thermal conductivity of beryllium

The thermal conductivity of beryllium is a very important physical characteristic, which considerably determines the serviceability of fusion reactor components where this material is supposed to be used. The neutron irradiation leads to a decrease of the thermal conductivity, the quantitative chara...

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Bibliographic Details
Published in:Journal of nuclear materials 2002-12, Vol.307, p.664-667
Main Authors: Syslov, D.N, Chakin, V.P, Latypov, R.N
Format: Article
Language:English
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Summary:The thermal conductivity of beryllium is a very important physical characteristic, which considerably determines the serviceability of fusion reactor components where this material is supposed to be used. The neutron irradiation leads to a decrease of the thermal conductivity, the quantitative characteristic of the effect considerably depending upon the irradiation temperature and dose. So, after the irradiation in the SM reactor at a temperature of 70 °C up to neutron fluence of (1–6)×10 22 cm −2 ( E>0.1 MeV) the effect reaches hundreds of percents, after irradiation in the BOR-60 reactor at a temperature of 400 °C up to fluence of 1.6×10 23 cm −2 ( E>0.1 MeV) the effect reaches only tens of percents. One hour annealing of beryllium at 500 °C after the low temperature irradiation leads to a partial thermal conductivity recovery.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(02)01264-3