Modeling of Heat Transfer in Spent-Nuclear-Fuel Container during Forced-Chilling Process

Abstract:

Application of spheroidal graphite cast iron in the production of spent-nuclear-fuel container contributes to improve the strength and toughness of the casting, because of the nodular shape of graphite. For a large-scale container, a forced-chilling technique is used to accelerate solidification process and raise spheroidization rate. In this paper, modeling of heat transfer in the container is performed. Influences of cooling media, inflow flux of coolant and thickness of sand layer upon the variations of cooling rate are systematically analyzed. Calculated results indicate that water as a coolant is more capable of enhancing the cooling course than air. Increasing inflow flux conducts an effective cooling job, whose influence is more apparent for air-cooling than for water-cooling. The role of decreasing the thickness of sand layer is most pronounced for raising solidification rate. The predicted cooling curves are compared with experimental measurements to validate the model.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 2342-2351
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.2342
• Online since: July 2011
• Authors: Li Ping Wang, Dong Rong Liu, Er Jun Guo
• Keywords: Forced-Chilling Technique, Heat Transfer, Modeling, Spent-Nuclear-Fuel Container

References

[1] P. Minnebo, K.-F. Nilsson and D. Blagoeva: J. Mater. Eng. Perform. Vol. 16 (2007), p.35

[2] X.D. Diao, Z. L. Ning, F. Y. Cao, S. Z. Ren and J. F. Sun: Advanced Materials Research Vol. 97-101(2001), p.1020

[3] K. F. Nilsson, V. Vokál: Mater. Sci. Eng. A Vol. 502 (2009), p.54

[4] L. P. Wang, E. J. Guo, H. B. Chen, J. Z. Wang and D. Y. Li: J. Rare Earth Vol. 24 (2006), p.103

[5] S. Nakamura: AFS Trans. Vol. 97 (1989), p.539

[6] D. M. Stefanescu: Metall. Mater. Trans. A Vol. 38 (2007), p.1433

[7] X. R. Yao: Processing design and numerical simulation of solidification of DQH-20 ductile-iron casting [M]. Harbin University of Science and Technology, China, 1993. (In Chinese)

[8] K. M. Pedersen: Solidification and microstructure of thin walled ductile cast iron [D]. Technical University of Denmark, Denmark, 2005.

[9] K. M. Pedersen, J. H. Hatte and N. Tiedje: Acta Mater. Vol. 54 (2006), p.5103

[10] K. Y. Lee, C. P. Hong: ISIJ Int. Vol. 1 (1997), p.38

[11] Ch.-A Gandin, M. Rappaz: Acta Metall. Mater. Vol. 42 (1994), p.2233

[12] J. P. Gu, C. Beckermann: Metall. Mater. Trans. A Vol. 30 (1999), p.1357

[13] B. G. Thomas, I. V. Samarasekera and J. K. Brimacombe: Metall. Mater. Trans. B Vol. 18 (1987), p.119

[14] W. C. Zhang: Physical simulation and numerical simulation of heavy ductile-iron casting [M]. Harbin University of Science and Technology, China, 1987. (In Chinese)

[15] L. P. Wang: Spheroidalization declining mechanism and control of thick walled RE-Mg ductile cast iron for nuclear spent fuel container [D]. Harbin University of Science and Technology, China, 2010. (In Chinese)

[16] X. M. Zhang: Heat Transfer (Architecture and Technology Press, China 2001)