MANUFACTURE AND TESTING OF ZIRCONIUM ALLOYS TUBES FOR NUCLEAR-REACTORFUEL-ELEMENTS

A series of tests have been run for Zr alloy tubes in a strain-stresse d and structural state worked by cold rolling. It has been shown that the information obtained can be used for predicting alloys' reserve of ductility, for evaluating the level of internal stresses built up and for detecting the incipient nuclei of fracture in the material. Sugge sted are methods of checking as based on the results of the study that afford a significant improvement in the product quality.