Mechanical Fretting Endurance Test of CANFLEX Fuel Bundle

Abstract

A 3000 hour mechanical fretting endurance test for the verification of the CANFLEX fuel bundle was performed in the KAERI CANDU Hot Test Loop facility. The test conditions were the same as the real reactor normal operating conditions. After the test, the dimensions and fretting wears of the test bundles and the pressure tube were carefully measured and inspected, which met the acceptance design criteria. Also, the historical trends of fretting wears of bearing pads and spacers were evaluated with the test results.