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http://dx.doi.org/10.1016/j.net.2020.07.017

Impact of hydrogen on rupture behaviour of Zircaloy-4 nuclear fuel cladding during loss-of-coolant accident: a novel observation of failure at multiple locations  

Suman, Siddharth (Department of Mechanical Engineering, Indian Institute of Technology Patna)
Publication Information
Nuclear Engineering and Technology / v.53, no.2, 2021 , pp. 474-483 More about this Journal
Abstract
To establish the exclusive role of hydrogen on burst behaviour of Zircaloy-4 during loss-of-coolant accident transients, an extensive single-rod burst tests were conducted on both unirradiated as-received and hydrogenated Zircaloy-4 cladding tubes at different heating rates and internal overpressures. The visual observations of cladding tubes during bursting as well as post-burst are presented in detail to understand the effect of hydrogen concentration, heating rate, and internal pressure. Impact of hydrogen on burst parameters-burst stress, burst strain, burst temperature-during loss-of-coolant accident transients are compared and discussed. Rupture at multiple locations for hydrogenated cladding at lower internal pressure and higher heating rate is reported for the very first time. A novel burst criterion accounting hydrogen concentration in nuclear fuel cladding is proposed.
Keywords
Embrittlement; Hydrogen; Hydride; Nuclear; Burst; LOCA;
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