Estimation of the Corrosion Thickness of a Disposal Container for High-Level Radioactive Wastes in a Wet Bentonite

Seung Soo Kim; Kwan Sik Chun; Kwang Cheol Kang; Min Hoon Baik; Soo Han Kwon; Jong Won Choi

Journal of Industrial and Engineering Chemistry, Vol.13, No.6, 959-964, November, 2007

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Estimation of the Corrosion Thickness of a Disposal Container for High-Level Radioactive Wastes in a Wet Bentonite

Seung Soo Kim^†, Kwan Sik Chun, Kwang Cheol Kang¹, Min Hoon Baik, Soo Han Kwon¹, and Jong Won Choi

Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Korea
¹Department of chemistry, Chungbuk National University, Cheongju 360-764, Korea

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The surface alteration and mass loss of iron and copper specimens have been investigated to understand the corrosion behavior of candidate materials for a metal container for the disposal of high-level radioactive wastes in a disposal condition. For the corrosion experiments, iron and copper specimens were put into the bentonite wetted with the two different groundwaters in order to compare the corrosion result in a synthetic groundwater with that in a natural groundwater. After the corrosion experiments, Cu2O was formed on the surface of the copper specimen and a dark green corrosion product on the surface of iron specimen. Experimental equations for the estimation of the corrosion thickness of iron and copper were induced as a function of corrosion time based upon the assumption that the mass loss of a specimen uniformly occurred over the whole surface of the specimen as follows: Xiron = (0.26 ± 0.08).t(0.64 ± 0.05) for iron and Xcopper = (0.063 ± 0.07).t(0.32 ± 0.02) for copper. From these two equations, the uniform corrosion thicknesses for iron and copper after 1000 years in an anaerobic disposal condition are estimated as 0.3∼2.4 mm and 2.6∼5.7 μm, respectively.

Keywords:corrosion;deep geological disposal;disposal container;bentonite

[References]

Chapman NA, McKinley IG, The geological disposal of nuclear waste, Wiley, Chichester (1989)
Kang CH, High-level waste disposal technology development-Geological Environmental study, KAERI/RR-2017/99, KAERI, Korea (1999)
Min BY, Kang Y, Song PS, Choi WK, Jung CH, Oh WZ, J. Ind. Eng. Chem., 13(1), 57 (2007)
Kim SS, Chun KS, Kang CH, Choi JW, Han KW, Estimated corrosion thickness of candidate materials for high-level waste disposal container in a disposal condition, KAERI/TR-2172/02, KAERI, Korea (2002)
Kang CH, High-level radwaste disposal High-level radwaste disposal system development, KAERI/RR-2336/02, KAERI, Korea (2002)
Reguer S, Dillmann P, Mirambet F, Corrosion Sci., 49, 2726 (2007)
Bildstein O, Trotignon L, Perronnet M, Jullien M, Physics and Chemistry of the Earth, 31, 618 (2006)
Feron D, Macdonald DD, Mat. Res. Soc. Symp. Proc., 932, 785 (2006)
Choi JW, Chun KS, Choi HJ, Cho DG, Hahn PS, The study of preliminary concept design for disposal container (KDC-1) of spent fuel, KAERI/TR-2936/2005, KAERI, Korea (2005)
Bowyer WH, Mat. Res. Soc. Symp. Proc., 932, 829 (2006)
Cho WJ, Lee JO, Chun KS, Appl. Clay Sci., 14, 47 (1999)
Karnland O, Long Term Test of Buffer Material; Final Report on the Pilot Parcels (2002)
Carlson L, Karnland O, Oversby VM, Rance AP, Smart NR, Snellman M, Vahanen M, Werme LO, Physics and Chemistry of the Earth, 32, 334 (2007)
JNC, H12: Project to Establish the Scientific and Technical Basis for HLW Disposal in Japan: Supporting Report 2, Chapter 2.2.1. The Engineered Barrier System, JNC, Japan (2002)
Marsh GP, An Assessment of Carbon Steel Overpacks for Radioactive Waste Disposal, EUR-10437-EN (1986)
Crusset D, Plas F, Santarini G, in Prediction of long term corrosion behavior in nuclear waste systems, D. Feron and D. D. Macdonald Ed., pp. 18-34, European Federation of Corrosion Publications, London (2003)
Xia X, Idemitsu K, Arima T, Inagaki Y, Ishidera T, Kurosawa S, Iijima K, Sato H, Appl. Clay Sci., 28, 89 (2005)
David D, Lemaitre C, Crusset D, in Prediction of long term corrosion behavior in nuclear waste systems, D. Feron and D. D. Macdonald Ed., pp. 241-260, European Federation of Corrosion Publications, London (2003)
King F, Copper Corrosion under Expected Conditions in a Deep Geologic Repository, POSIVA 2002-01, POSIVA, Filand (2002)
Kienzler B, Vejmelka P, Romer J, Fanghnel E, Jansson M, Eriksen EE, Wikberg P, J. Contam. Hydrol., 61, 219 (2003)
Wersin PSP, Bruno J, Kinetic Modeling of Betonies-Container Interaction. Long-Term Predictions and Anoxic Conditions, SKB-TR-94-25, SKB, Sweden (1994)

[Referenced By]

[1] Chapman NA, McKinley IG, The geological disposal of nuclear waste, Wiley, Chichester (1989)

[2] Kang CH, High-level waste disposal technology development-Geological Environmental study, KAERI/RR-2017/99, KAERI, Korea (1999)

[3] Min BY, Kang Y, Song PS, Choi WK, Jung CH, Oh WZ, J. Ind. Eng. Chem., 13(1), 57 (2007)

[4] Kim SS, Chun KS, Kang CH, Choi JW, Han KW, Estimated corrosion thickness of candidate materials for high-level waste disposal container in a disposal condition, KAERI/TR-2172/02, KAERI, Korea (2002)

[5] Kang CH, High-level radwaste disposal High-level radwaste disposal system development, KAERI/RR-2336/02, KAERI, Korea (2002)

[6] Reguer S, Dillmann P, Mirambet F, Corrosion Sci., 49, 2726 (2007)

[7] Bildstein O, Trotignon L, Perronnet M, Jullien M, Physics and Chemistry of the Earth, 31, 618 (2006)

[8] Feron D, Macdonald DD, Mat. Res. Soc. Symp. Proc., 932, 785 (2006)

[9] Choi JW, Chun KS, Choi HJ, Cho DG, Hahn PS, The study of preliminary concept design for disposal container (KDC-1) of spent fuel, KAERI/TR-2936/2005, KAERI, Korea (2005)

[10] Bowyer WH, Mat. Res. Soc. Symp. Proc., 932, 829 (2006)

[11] Cho WJ, Lee JO, Chun KS, Appl. Clay Sci., 14, 47 (1999)

[12] Karnland O, Long Term Test of Buffer Material; Final Report on the Pilot Parcels (2002)

[13] Carlson L, Karnland O, Oversby VM, Rance AP, Smart NR, Snellman M, Vahanen M, Werme LO, Physics and Chemistry of the Earth, 32, 334 (2007)

[14] JNC, H12: Project to Establish the Scientific and Technical Basis for HLW Disposal in Japan: Supporting Report 2, Chapter 2.2.1. The Engineered Barrier System, JNC, Japan (2002)

[15] Marsh GP, An Assessment of Carbon Steel Overpacks for Radioactive Waste Disposal, EUR-10437-EN (1986)

[16] Crusset D, Plas F, Santarini G, in Prediction of long term corrosion behavior in nuclear waste systems, D. Feron and D. D. Macdonald Ed., pp. 18-34, European Federation of Corrosion Publications, London (2003)

[17] Xia X, Idemitsu K, Arima T, Inagaki Y, Ishidera T, Kurosawa S, Iijima K, Sato H, Appl. Clay Sci., 28, 89 (2005)

[18] David D, Lemaitre C, Crusset D, in Prediction of long term corrosion behavior in nuclear waste systems, D. Feron and D. D. Macdonald Ed., pp. 241-260, European Federation of Corrosion Publications, London (2003)

[19] King F, Copper Corrosion under Expected Conditions in a Deep Geologic Repository, POSIVA 2002-01, POSIVA, Filand (2002)

[20] Kienzler B, Vejmelka P, Romer J, Fanghnel E, Jansson M, Eriksen EE, Wikberg P, J. Contam. Hydrol., 61, 219 (2003)

[21] Wersin PSP, Bruno J, Kinetic Modeling of Betonies-Container Interaction. Long-Term Predictions and Anoxic Conditions, SKB-TR-94-25, SKB, Sweden (1994)