David Cox shows viewers a sample weld to illustrate how several millimetres of aluminum thickness is being applied to the vessel wall at each repair site to provide both additional structural strength to the vessel wall and sufficient corrosion allowance so that the vessel lifetime can be extended to meet NRU’s future obligations. He outlines how three different non-destructive examination techniques are required to verify the quality of each weld repair and to ensure there are no defects produced in the vessel through the weld buildup process.