Antony Jose Subin, John Merbin, Misra Manoranjan, Menezes Pradeep L
Department of Mechanical Engineering, University of Nevada, Reno, NV 89557, USA.
Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA.
Materials (Basel). 2025 Jan 18;18(2):438. doi: 10.3390/ma18020438.
Fusion-welded austenitic stainless steel (ASS) was predominantly employed to manufacture dry storage canisters (DSCs) for the storage applications of spent nuclear fuel (SNF). However, the ASS weld joints are prone to chloride-induced stress corrosion cracking (CISCC), a critical safety issue in the nuclear industry. DSCs were exposed to a chloride-rich environment during storage, creating CISCC precursors. The CISCC failure leads to nuclear radiation leakage. Therefore, there is a critical need to enhance the CISCC resistance of DSC weld joints using promising repair techniques. This review article encapsulates the current state-of-the-art of peening techniques for mitigating the CISCC in DSCs. More specifically, conventional shot peening (CSP), ultrasonic impact peening (UIP), and laser shock peening (LSP) were elucidated with a focus on CISCC mitigation. The underlying mechanism of CISCC mitigation in each process was summarized. Finally, this review provides recent advances in surface modification techniques, repair techniques, and developments in welding techniques for CISCC mitigation in DSCs.
熔焊奥氏体不锈钢（ASS）主要用于制造乏核燃料（SNF）储存应用的干式储存罐（DSC）。然而，ASS焊接接头容易发生氯化物诱导的应力腐蚀开裂（CISCC），这是核工业中的一个关键安全问题。DSC在储存期间会暴露于富含氯化物的环境中，从而产生CISCC的前体。CISCC失效会导致核辐射泄漏。因此，迫切需要使用有前景的修复技术来提高DSC焊接接头的抗CISCC性能。这篇综述文章总结了用于减轻DSC中CISCC的喷丸技术的当前技术水平。更具体地说，阐述了传统喷丸（CSP）、超声冲击喷丸（UIP）和激光冲击喷丸（LSP），重点是减轻CISCC。总结了每个过程中减轻CISCC的潜在机制。最后，本综述介绍了用于减轻DSC中CISCC的表面改性技术、修复技术和焊接技术的最新进展。
