Neuere Arbeitsergebnisse aus dem Vorhaben 'Diffusionsdaten und Spaltproduktfreisetzung'

This report contains a compilation of single contributions, which were presented an the occasion of a series of lectures in theInstitute of Reactor Development in March 1977. Results for Cs-diffusion in coated particles and spherical fuel elements are presented in detail and discussed in respect to their consequences. Besides this it is reported about progress in methodical development. By application of two independent methods the quantitative determination of the "rare" silver Isotope Ag-11om in high burnt-up HTR fuel succeeded. The new developed technique of laser drilling is presented in its basis. With the aid of results for Cs-release and distribution in coated particles the efficiency and the inserting potential of this method are proved. By this first statements about the release behaviour of defect particies can be gained.