[3J14-16] Behavior of FPs 2

[3J15] Axial migration and accumulation behavior of cesium in fast reactor fuel pins

(2)Evaluation of diameter change of fuel pellet by cesium local accumulation

*Takashi Tanno¹, Hiroshi Oka¹, Yoshihisa Ikusawa¹, Tomoyuki Uwaba¹, Takeji Kaito¹ (1. JAEA)

Keywords:Fast reactor, Cesium, High burn-up, FCMI, MOX, Diameter change of fuel pellet

Evaluation of diameter changes of fuel pellets by cesium (Cs) accumulation based on γ-scan profiles was carried out in order to estimate the influence of axial migration and accumulation behavior of Cs for fuel-cladding mechanical interaction (FCMI). Local diameter change and FCMI of the blanket pellets facing MOX pellets were predicted for EBR-II irradiation test.