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A Nonlinear Structural Analysis for a Composite Structure Composed of Spent Nuclear Fuel Disposal Canister and Bentonite Buffer： Symmetric Rock Movement  

권영주 (홍익대학교 기계정보공학과)
최석호 (삼진전공(주))
최종원 (한국원자력연구소)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.16, no.4, 2003 , pp. 369-376 More about this Journal
Abstract
In this paper, a nonlinear structural analysis for the composite structure composed of the spent nuclear fuel disposal canister and the 50㎝ thick bentonite buffer is carried out to predict the collapse of the canister while the horizontal symmetric sudden rock movement of 10㎝ is applied on the composite structure. This sudden rock movement is anticipated by the earthquake etc. at a deep underground. Elastoplastic material model is adopted. Drucket-Prager yield criterion is used for the material yield prediction of the bentonite buffer and von-Mises yield criterion is used for the material yield prediction of the canister(cast iron, copper). Analysis results show that even though very large deformations occur beyond the yield point in the bentonite buffet, the canister structure still endures elastic small strains and stresses below the yield strength. Hence, the 50㎝ thick bentonite buffet can protect the canister safely against the 10㎝ sudden rock movement by earthquake etc.. Analysis results also show that bending deformations occur in the canister structure due to the shear deformation of the bentonite buffer.
Keywords
spent nuclear fuel disposal canister; bentonite buffer; composite structure; rock movement; nunlinear structural analysis; yield criterion; finite element analysis;
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1 Anttila, M., 'Criticality Safety Calculations for the Nuclear Waste Disposal Canisters', Report POSIVA-96-11, Posiva Oy, Helsinki, 1996
2 Raiko, H. and Salo, J. P., 'The Design Analysis of ACP-Canister for Nuclear Waste Disposal', Report YJT-92-05, Nuclear Waste Commission of Finnish Power Companies, Helsinki, Finland, 1992
3 Ahonen, L., 'Chemical Stability of Copper Canisters in Deep Repository', Report YJT-94-13, Nuclear Waste Commission of Finnish Power Companies, Helsinki, p.101, 1995
4 Raiko, H. and Salo, J. P., 'Design Report of the Canister for Nuclear Fuel Disposal', Report POSIVA 96-13, Posiva Oy, Helsinki, ISBN 951-652-012-x, Finland, 1996
5 Bӧrgesson, L., 'Interaction between Rock, Bentonite Buffer and Canister. FEM Calculations of Some Mechanical Effects of Canister in Different Disposal Concepts', Technical Report TR 92-20, Swedish Nuclear Fuel and Waste Management Co. (SKB), Stockholm. p.83 appendixes, ISSN 0284-3757, 1992
6 Raiko, H. and Salo, J. P., 'Design Report of the Disposal Canister for Twelve Fuel Asse-mblies,' Report Posiva-99-18, Posiva Oy, Helsinki, Finland, 1999
7 Auerkari, P. and Holmstrom, S., 'Long-term Strength of EB Welds of the Canister for Nuclear Fuel Disposa', Working Report 97-35e, Posiva Oy, Helsinki, p.21, 1997
8 Kwon, Y.J., Kang, S.U., Choi, J.W., and Kang, C.H., 'Structural Analysis for the Determination of Design Variables of Spent Nuclear Fuel Disposal Canister', KSME International Journal, Vol.15, No.3, pp.327-338, 2001
9 Choi, J. W., Choi, Y. S., Kwon, S. K., Kuh, J. E., and Kang, C. H., 'Technology Assessment of the Repository Alternatives to Establish a Reference HLW Disposal Concept', Journal of the Korean Nuclear Society, Vol.31, Number 6, pp.83-100, 1999
10 강신욱, '심지층 고준위 핵폐기물 처분용기의 구조해석', 석사학위 논문, 홍익대학교, p.76, 2000
11 권영주, 김재희, '액체금속로 핵연료교환장치의 구조해석 I : 기구동역학해석', 한국전산구조공학회 논문집, 제12권, 제4호, pp.573-581, 1999
12 Salo, J. P. and Raiko, H., 'The Copper/Steel Canister Design for Nuclear Waste Disposal', TVO/KPA Turvallisuus ja tekniikka, Work Report 90-10, Rev. 1., Teollisuuden Voima Oy, Helsinki, Finland, 1990
13 Werme, L. and Eriksson, J., 'Copper Canister with Cast Inner Component,' Technical Report TR-95-02, Swedish Nuclear Fuel and Waste Management Co. (SKB), Stockholm, Sweden, ISSN 0284-3757, 1995
14 Anttila, M., 'Criticality Safety Calculations of the Nuclear Waste Disposal Canisters for Twelve Spent Fuel Assemblies', Working Report 99-03, Posiva Oy, Helsinki, p.20, 1999