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The fabrication of bulk delta-phase Zirconium Hydride ($\delta$-ZrH) usingZircaloy-4 as a precursor is herein reported. Characterization usingelectron-microscopy methods indicate that the fabricated material is of asingle-phase. Sn-rich segregation zones have been observed to form as a directresult of the hydriding process. These findings experimentally validateprevious \textit{ab initio} calculations on the influence H incorporation inZircaloy-4 constitutional elements such as Sn, Fe and Cr. The effect ofhydriding and Sn segregation on pre-existing Zr(Fe,Cr)$_{2}$ Laves phases isalso evaluated. Major implications on the development of moderators for use inmicroreactors within the nuclear industry are discussed.

Fabrication of bulk delta-phase Zirconium Hydride from Zircaloy-4 for use as moderators in microreactors