Mock-up Tests for Multiple Welds of Zircaloy Specimen

The purpose of this paper is to verify the integrity of the multiple welding by using the Zr-4 weld coupons. The coupons of repetitive welding and original material, made by the same procedures according to the ITP (Inspection and Test Plan) and relevant codes, have been tested for tensile, bending, macro-examination, micro-examination, micro hardness, and corrosion. According to the IPT and ASME, tensile and bending test are mandatory as a go / no-go criteria but the other material tests and examination are not mandatory i.e., only for reference. From the results of the six (6) tests specified in the ITP, the weld specimens of both coupon A and B showed good reliable performances and no adverse effect on the material properties as well as the mechanical strength. It is concluded that the multiple weld specimens for Zr-4 have not shown any deficiencies in its mechanical strength or material properties. All the quantitative test results are satisfied with the acceptance criteria.