Flow induced vibrations of calandria and reactivity mechanism guide tubes in CANDU calandria

Flow-induced vibrations of the calandria tubes and the reactivity mechanism guide tubes inside CANDU calandria are required to be carefully examined and controlled. This is because such vibrations would adversely affect the integrity of the roll-expanded end joints of these tubes and may cause fretting between the horizontal calandria tube and the adjacent vertical reactivity mechanism guide tube since the gap between them is quite small. The experimental and theoretical work being carried out at the Indian Institute of Science, Bangalore for studying various aspects of this problem is described. (author)