A perspective on welding technology challenges in the nuclear sector

Abstract

This article describes three areas that, in the opinion of the author, should be priorities for development in the nuclear sector. The application of electron-beam (or laser in vacuo) welding to pressure vessel fabrication, the optimisation of filler metal compositions for multipass steel welds, and the pre-fabrication of dissimilar metal transition pieces are each highlighted and discussed. While conceived with the nuclear sector in mind, these priority areas are relevant more generally to the welding of pressure vessels, piping, and similar structures. The intention is to stimulate ideas, to provoke debate, and to encourage the welding community to rise to the challenges that must be overcome as we transition to a low-carbon future.