Abstract: A segmented lattice rack to store fuels coming from nuclear reactors, whose walls are made of plates joined orthogonally forming a mesh defining multiple cell cavities which are longitudinally coupled forming a sandwich comprising a central part coinciding with the active part of the stored element, being from a material obtained from neutronic poisons, preferably boron treated steel; whilst the end areas coinciding with the non-active part of the stored radioactive element are of normal stainless steel, joined to each other and with the adjacent components by means of welding or pretensioning.

Abstract: A rack to store fuels from nuclear reactors, formed by individual cells according to a four corner matching, in which each one of the individual cells (1) is formed by four plates (2) joined along the longitudinal edges, forming a hollow quadrangular prism and open on its bases, in which said plates have crenelated longitudinal edges, provided with protrusions (21), preferably rectangular, of variable length, of a width at least equal to the plate (2) thickness and a fillet weld backing.

Abstract: Method to implant defects in a metallic component, for the retraining and qualification of operators and in non-destructive test techniques. This method is characterized by the implantation of non-homogenious material directly in the model item and to do so excavations are made that, following implantation of the defects, are filled by a welding process.