High Temperature Corrosion $(20)$

The oxygen distribution during double sided corrosion at high temperature is shown in the Figure below from the notes. An approximation of this curve is shown below. Using the approximate curve, and assuming $26wt\%$ is the hydrogen content in the $Zr{O}_2$ oxide, what is the equivalent cladding reacted $($ECR$)$ in this case? Is it above $17\%?$

Distance from OD Oxide Surface $($mm$)$

Fig. $1.$ Schematic illustration of microstructure $($top$)$ and oxygen distribution $($bottom$)$ in oxide, stabilized alpha, and prior$-$beta $($transformed$-$beta$)$ layers in Zircaloy cladding after oxidation near $1200C.$