Applicability of swaging as an alternative for the fabrication of accident-tolerant fuel cladding
- Authors
- Kim, D.Y.; Lee, Y.N.; Kim, J.H.; Kim, Y.; Yoon, Y.S.
- Issue Date
- Jun-2020
- Publisher
- MDPI AG
- Keywords
- Accident-tolerant fuel (ATF) cladding; Alternative process; Non-coating method; Pseudo-single tube (PST); Room-temperature swaging
- Citation
- Energies, v.13, no.12
- Journal Title
- Energies
- Volume
- 13
- Number
- 12
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/77551
- DOI
- 10.3390/en13123182
- ISSN
- 1996-1073
- Abstract
- We suggest an alternative to conventional coating methods for accident-tolerant fuel (ATF) cladding. A Zircaloy-4 tube was inserted into metal tubes of different materials and the inserted tubes were subjected to physical force at roomtemperature. The manufactured tube exhibited a pseudo-single tube (PST) structure and had higher thermal stability than a Zircaloy-4 tube. Optical microscopy and scanning electron microscopy images showed that the PST had a uniform and well-bonded interface structure, i.e., no gaps or voids were found at the interface between the inner and outer tubes. Energy-dispersive X-ray spectroscopy analysis confirmed that the metal components did not interdifiuse at the interface of the PST, even after being kept at 600 and 900 °C for 1 h and rapidly cooled to room temperature. Unlike pure Zircaloy-4 tubes, Zircaloy-4/stainless use steel (SUS) 316 PST did not show significant structural collapse, even after being stored at 1200 °C for 1 h. Based on these results, if a PST was fabricated using a Zircaloy-4 tube thinner than the Zircaloy-4 tube used in this study and an outer tube of micron-scale thickness, swaging may be a feasible alternative to Zircaloy-4-based ATF cladding. © 2020 by the authors.
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