Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
권호 표지
DOI QR코드

DOI QR Code

Design Optimization of an Impact Limiter Considering Material Uncertainties

  • Received : 2021.10.27
  • Accepted : 2022.02.09
  • Published : 2022.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The design of a wooden impact limiter equipped to a transportation cask for radioactive materials was optimized. According to International Atomic Energy Agency Safety Standards, 9 m drop tests should be performed on the transportation cask to evaluate its structural integrity in a hypothetical accident condition. For impact resistance, the size of the impact limiter should be properly determined for the impact limiter to absorb the impact energy and reduce the impact force. Therefore, the design parameters of the impact limiter were optimized to obtain a feasible optimal design. The design feasibility criteria were investigated, and several objectives were defined to obtain various design solutions. Furthermore, a probabilistic approach was introduced considering the uncertainties included in an engineering system. The uncertainty of material properties was assumed to be a random variable, and the probabilistic feasibility, based on the stochastic approach, was evaluated using reliability. Monte Carlo simulation was used to calculate the reliability to ensure a proper safety margin under the influence of uncertainties. The proposed methodology can provide a useful approach for the preliminary design of the impact limiter prior to the detailed design stage.

Keywords

Acknowledgement

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20201710200010 and No. 20211710200020). This work was partially supported by the Institute for Korea Spent Nuclear Fuel (iKSNF) and National Research Foundation of Korea (NRF) grant funded by the Korea government (Ministry of Science and ICT, MSIT) (No. 2021M2E1A1085229).

References

  1. International Atomic Energy Agency, Regulations for the Safe Transport of Radioactive Material, IAEA Safety Standard Series No. SSR-6 (Rev. 1) (2018).
  2. International Atomic Energy Agency, Advisory Material for the IAEA Regulations for the Safe Transport of Radioactive Material (2012 Edition), IAEA Safety Standard Series No. SSG-26 (2014).
  3. W.S. Choi and K.S. Seo, "A Simple Sizing Optimization Technique for an Impact Limiter Based on Dynamic Material Properties", Nucl. Eng. Des., 240(4), 925-932 (2010). https://doi.org/10.1016/j.nucengdes.2009.12.008
  4. W.S. Choi and K.S. Seo, "Shape Optimization of a Torus Seal Under Multiple Loading Conditions Based on the Stress Categories in the ASME Code Section III", Nucl. Eng. Des., 241(8), 2653-2659 (2011). https://doi.org/10.1016/j.nucengdes.2011.04.046
  5. K. Sharma, D.N. Pawaskar, A. Guha, and R.K. Singh, "Optimization of Cask for Transport of Radioactive Material Under Impact Loading", Nucl. Eng. Des., 273, 190-201 (2014). https://doi.org/10.1016/j.nucengdes.2014.03.021
  6. U.T. Murtaza and M.J. Hyder, "Optimization of the Size and Shape of the Set-in Nozzle for a PWR Reactor Pressure Vessel", Nucl. Eng. Des., 284, 219-227 (2015). https://doi.org/10.1016/j.nucengdes.2014.12.040
  7. N. Butler, "Computer Modeling of Wood-filled Impact Limiters", Nucl. Eng. Des., 150(2-3), 417-424 (1994). https://doi.org/10.1016/0029-5493(94)90161-9
  8. L. Qiao, U. Zencker, H. Volzke, F. Wille, and A. Musolff, "Validation of Numerical Simulation Models for Transport and Storage Casks Using Drop Test Results", Proc. of the 11th Int. Conference on Computational Structures Technology, Civil-Comp Press, Stirlingshire, Scotland (2012).
  9. S. Lee, S.S. Cho, J.E. Jeon, K.Y. Kim, and K.S. Seo, "Impact Analyses and Tests of Concrete Overpacks of Spent Nuclear Fuel Storage Casks", Nucl. Eng. Technol., 46(1), 73-80 (2014). https://doi.org/10.5516/NET.06.2013.005
  10. H. Yoshihara, "Prediction of the Off-axis Stress-strain Relation of Wood Under Compression Loading", Eur. J. Wood Wood Prod., 67(2), 183-188 (2009). https://doi.org/10.1007/s00107-009-0320-6
  11. J. Arora, Introduction to Optimum Design, 2nd Edi., Academic Press, Massachusetts (2004).
  12. Dassualt System, ABAQUS/Explicit User's Manual (2020).
  13. G. Eisenacher, R. Scheidemann, M. Neumann, B. Droste, and H. Volzke, "Dynamic Crushing Characteristics of Spruce Wood Under Large Deformations", Wood Sci. Technol., 47(2), 369-380 (2013). https://doi.org/10.1007/s00226-012-0508-5
  14. R.Y. Rubinstein and D.P. Kroese, Simulation and the Monte Carlo Method, 2nd Edi., John Wiley & Sons, New Jersey (2011).
  15. I. Lee, K.K. Choi, Y. Noh, L. Zhao, and D. Gorsich, "Sampling-Based Stochastic Sensitivity Analysis Using Score Functions for RBDO Problems With Correlated Random Variables", J. Mech. Des., 133(2), 021003 (2011). https://doi.org/10.1115/1.4003186