Azimuthally anisotropic hydride lens structures in Zircaloy 4 nuclear fuel cladding: High-resolution neutron radiography imaging and BISON finite element analysis

Measured sample transmission (left) and transformed hydrogen concentration (right) showing the azimuthally anisotropic hydride lens structure on Zircaloy LWR fuel cladding. The azimuthally anisotropic lens structure is a consequence of compressive stress modulation within the hydride layer. Finite element analysis predicts this modulation.428