Secondary degradation of failed BWR fuel rods
InformationFörfattare: Axel Sjöstrand
Beräknat färdigt: 2020-05
Handledare: Clara Anghel
Handledares företag/institution: Westinghouse
Ämnesgranskare: Peter Andersson
PresentationPresentatör: Axel Sjöstrand
This report is presenting an analysis of the latest BWR fuel failures from Westinghouse 10×10 fuel assemblies with focus on the secondary degradation. The main aim is to explore the mechanisms of secondary degradation and to find correlation between the severity of secondary degradation of failed fuel rods and the operation history of the failed rods from the timespan when the primary failure was detected until end of the respective fuel cycle (EOC). The timespan for the occurrence of the primary failure and the evolution to secondary degradation were determined to the extent possible from the available data including activity data, photos, power history etc.