Complementary Post-Irradiation Examinations of KWU/CE Rods at Karlstein: The Studsvik Super-Ramp Extension Project

摘要

As a part of the Studsvik SUPER-RAMP Extension Project (SRX) additional post-irradiation examinations were performed on test fuel rods supplied by KWU/CE for the SUPER-RAMP Project (SR). The objective was to extend and complete the data base, particularly with respect to the different PCI-failure propensity of the various rod groups. Therefore, the series of fuel and clad inside studies, performed in the SR Project at local ramp power of 420 to 440 W/cm was expanded to investigate the effects of reduced clad temperature and of short hold time at ramp power. On the other hand, the condition of the fuel rods prior to the ramp test was studied by examination of one base-irradiated, non-ramped rod of each group. This report describes the results of these examinations. The detailed scope of the examination program together with the main irradiation data of the test fuel rods is shown in this document. 1 ref., 27 figs., 4 tabs.