ANALYSIS OF PHYSICOCHEMICAL PROCESSES IN MULTICOMPONENT ELECTRICITY GENERATING CHANNELS WITH COMMUNICATING FUEL-ELEMENT AND INTERELECTRODE GAPS

摘要

The behavior of the main components of uranium dioxide, gaseous impurities, and fission products and the transfer of emitter material to a collector under conditions where the fuel-element and interelectrode gaps of a multicomponent electricity generating channel (EGC) communicate with one another are examined. The results of in-reactor experimental investigations of the temperature zones of condensation of fission products, using uranium dioxide based model fuel, and circuit tests of EGC are presented. It is shown that fission product settling on the collector is negligible; tungsten transfer from the emitter onto the collector can counterbalance this effect.