Skip to main content Accessibility help
×
Home

Migration Behavior of Copper in Compacted Bentonite Using Electromigration Techniques

  • Kazuya Idemitsu (a1), Keisuke Yoshida (a1), Yaohiro Inagaki (a1) and Tatsumi Arima (a1)

Abstract

Copper is a candidate for use as an overpack material in deep underground nuclear waste disposal. Copper, however, is susceptible to corrosion following closure of the repository and migration of the corrosion products through the buffer material may affect the migration of redox-sensitive radionuclides. Electromigration experiments were performed whereby a copper coupon, which was in contact with compacted bentonite, served as the working electrode and was held at a constant potential of between +100 to +400 mV vs. Ag/AgCl electrode for up to 48 h. The amounts of copper that migrated into the bentonite specimens were found to be in good agreement with the calculated values based on the corrosion current flow for the assumption that copper underwent anodic dissolution as Cu(II). A model based on dispersion and electromigration was able to explain the measured copper profiles in the bentonite specimens. The fitted values of the dispersion coefficient did not depend on the applied potential and were about 10-12 m2/s.

Copyright

Corresponding author

References

Hide All
1.Aku Itälä, , VTT Science 183, 2018.
2.Idemitsu, K., Yano, S., Xia, X., Inagaki, Y., Arima, T., Mitsugashira, T., Hara, M., Suzuki, Y. in Scientific Basis for Nuclear Waste Management XXV, edited by McGrail, B.P. and Cragnolono, G. A. (Mater. Res. Soc. Proc. 713, Pittsburgh, PA, 2001) pp.113-120.
3.Idemitsu, K., Yamasaki, Y., Nessa, S. A., Inagaki, Y., Arima, T., Mitsugashira, T., Hara, M., Suzuki, Y. in Scientific Basis for Nuclear Waste Management XXX, edited by Dunn, D.S., Poinssot, C., Begg, B. (Mater. Res. Soc. Proc. 985, Pittsburgh, PA, 2007), NN11-7.
4.Idemitsu, K., Yano, S., Xia, X., Kikuchi, Y., Inagaki, Y., Arima, T. in Scientific Basis for Nuclear Waste Management XXVI, edited by Finch, R. J. and Bullen, D. B. (Mater. Res. Soc. Proc. 757, Pittsburgh, PA, 2003) pp.657-664.
5.Idemitsu, K., Xia, X., Kikuchi, Y., Inagaki, Y., Arima, T. in Scientific Basis for Nuclear Waste Management XXVIII, edited by Hanchar, John M., Stroes-Gascoyne, Simcha, Browning, Lauren (Mater. Res. Soc. Proc. 824, Pittsburgh, PA, 2004) pp.491-496.
6.Higashihara, T., Kinoshita, K., Sato, S., and Kozaki, T.. Appl. Clay Sci. 26, 91 (2004).
7.Muurinenn, A. et.al. in Scientific Basis for Nuclear Waste Management VIII, edited by Brown, P. W. and Oversby, V. M. (Mater. Res. Soc. Proc. 176, Pittsburgh, PA, 1989) pp.641-647.
8.Hamada, R., Maeda, N., Idemitsu, K., Inagaki, Y., Arima, T., Akiyama, D., Konashi, K., Watanabe, M., Koyama, S. in Scientific Basis for Nuclear Waste Management XXXIX, MRS Advances, Vol. 1 Issue 12 pp.693-698, 2017.

Keywords

Migration Behavior of Copper in Compacted Bentonite Using Electromigration Techniques

  • Kazuya Idemitsu (a1), Keisuke Yoshida (a1), Yaohiro Inagaki (a1) and Tatsumi Arima (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.