Ponente
Descripción
The DONES High Flux Test Module shall serve to irradiate material samples up to 50 dpa in a temperature range of 250 - 550 °C in a 14 MeV type neutron spectrum. Inevitably, the same and even slightly higher structural damage will be effected in the HFTM's structural and functional components. The HFTM design responds to this challenge by separation of functions and avoiding the most critical combination of loads (i.e., adjusting temperature and stresses in a beneficial way) where possible. Still, the pressure bearing container of the HFTM is challenged by swelling and loss of ductility, the capsules at low temperatures could face embrittlement, and the ceramic insulators of the electrical heaters and sensors are affected by Radiation Induced Conductivity and Radiation Induced Electrical Degradation. The contribution discusses quality and magnitude of the effects, measures to mitigate detrimental effects in the design of the HFTM, and steps towards an optimized materials selection.