Fission Product Migration in Intact Fuel Rods. S176 Experiments 1-5: Gamma Spectrometric and beta Autoradiography Results on Radial Fission Product Distribution

摘要

This report is the third of a group which present the results obtained during the first 5 experiments in the S176 series of irradiation experiments. The aim of this series is to provide information on the distribution of fission products in intact irradiated fuel rods, both within the UO sub 2 , fuel and on the inside of the Zircaloy clad. Fuel rods, previously irradiated to appreciable burnups in the Aagesta R3 reactor, after cooling, are reirradiated in the Studsvik R2 test reactor for short periods to build up significant inventories of short-lived fission products of interest. The irradiation conditions are well defined. Examination of sections of fuel and clad within a short time after removal from the reactor is performed by means of high-resolution Ge(Li) gamma spectrometry. The fuel sections are also examined metallographically to determine fuel structure, and by beta autoradiography. (Atomindex citation 10:433643)