Report on the IEA Workshop held at Princeton, New Jersey, United States of America, 16-18 March 1998.Recent experience with the use of tritium fuel in the TFTR and JET,together with progress in developing the technical design of ITER, has expandedthe technical knowledge base for tritium issues in fusion. This paper reports on an IEA workshop that brought together scientists and engineers to shareexperience and expertise on all fusion related tritium issues. Extensivediscussion periods were devoted to exploring outstanding issues and identifying potential R&D avenues to address them. The presentations, discussions and recommendations are summarized.