DEVELOPMENT AND ITER RELEVANT APPLICATION OF A USER-FRIENDLY INTERFACE (TEM) FOR USE WITH THE TMAP4 CODE

The Tritium Enclosure Model (TEM) has been developed as a user friendl y interface to facilitate the application of the previously validated, verified and ITER approved TMAP4 Code. TEM (and TMAP4) dynamically an alyzes the movement of tritium through structures, between structures and adjoining enclosures. Credible ITER relevant accident scenarios we re developed and analyzed. The analyses considered the scenario with t he cleanup system active or inactive, with and without the surface int eractions. For surface interaction cases, the epoxy characteristics re ported in the TMAP4 User Manual were used. Typical applications for TE M are the estimation of time-dependent tritium inventories in enclosur es, as well as emissions to the environment following an accidental sp ill into any set of enclosures connected to cleanup systems. This pape r outlines the various features of TEM and reports on the application of TEM to determine environmental source terms for the ITER Fuel Cycle and Cooling Systems, under chronic and accidental tritium releases.