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Thermotransport of Hydrogen in Zr-1.0Nb-1.0Sn-0.1Fe Alloy

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Abstract:

Hydrogen redistribution caused by thermotransport in the Zr-1.0Nb-1.0Sn-0.1Fe alloy under the temperature gradient which is likely to be encountered between nuclear fuel cladding and primary cooling water (300-340) was investigated. The heat of transport (Q*) of hydrogen was determined by using a steady state technique to evaluate the magnitude and direction of thermotransport of hydrogen in the alloy. The values of Q∗ were 23.1, 23.7 and 27.1 KJ/mol for the hydrogen concentration of 73.4, 75.8 and 94.3 ppm by weight respectively. In other words, hydrogen was transported from hot region to cold region and the value of Q∗ increased with increasing overall hydrogen concentration. The Zr-1.0Nb-1.0Sn-0.1Fe alloy had the smaller Q∗ value than that of Zircaloy-4 when compared with same overall hydrogen concentration. Thus, Zr-1.0Nb-1.0Sn-0.1Fe alloy has better resistance to the formation of hydride due to thermotransport than Zircaloy-4 does.

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Info:

Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1477-1480

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1477

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Online since:

June 2007

Authors:

Joung Ah Kang, Kwon Yeong Lee, Gyung Guk Kim, Ji Hui Kim, Sun Doo Kim, Chong Seung Yoon, Kyung Jong Lee, Seon Jin Kim

Keywords:

Heat of Transport (Q*), Hydrogen, Thermotransport, Zr-1.0Nb-1.0Sn-0.1Fe Alloy

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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