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Optimal Design of Spent Fuel Containment Impact Limiter by Response Surface Method

[+] Author Affiliations
Haijun Hu, Qiqi Tong, Yun Li, Sheng Wang

Xi'an Jiaotong University, Xi'an, China

Fei Fan, Jiancang Li, Hai Ye, Peizhen Sheng

Lanzhou Lanshi Energy Equipment Institute Co., Ltd., Lanzhou, China

Paper No. PVP2018-84429, pp. V007T07A035; 7 pages
doi:10.1115/PVP2018-84429
From:
  • ASME 2018 Pressure Vessels and Piping Conference
  • Volume 7: Operations, Applications, and Components
  • Prague, Czech Republic, July 15–20, 2018
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5170-8
  • Copyright © 2018 by ASME

abstract

Impact limiters are attached near to the top and the bottom of a spent fuel containment body as shock absorbers to maintain the structural integrity of the containment not only in normal condition but also in hypothetical accident condition of 9m falling. Ellipsoidal-head-like metallic impact limiters are used for a spent fuel containment which is designed to carry 26 spent fuel assemblies. Main geometry dimensions of the limiters, such as diameter, thickness of the shell, length of straight flange and fillet radius, are design variables. The LS-DYNA software is applied to simulate the acceleration of containment in a falling accident. Sensitivity analyses of the variables on acceleration of spent fuel containment in the 9m falling accident are carried out. By response surface method, the best geometry dimensions which minimize the acceleration of the containment in falling accident are achieved. As showed in results, ellipsoidal head shaped metallic impact limiters work very well in the 9m falling accident. They could significantly decrease load factor and provide more safety margin.

Copyright © 2018 by ASME

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