[2J05-08] Severe Accident 3

[2J07] Initial melting reaction mechanism of BWR structural material with Zircaloy/Steel or Inconel

*Ayumi Itoh¹, Shintaro Yasui Yasui¹, Yoshinao Kobayashi¹, Kan Sakamoto², Kenichi Ito³, Mutsumi Hirai³, Masato Mizokami³ (1. Tokyo Tech, 2. NFD, 3. TEPCO HD)

Keywords:Fukushima Daiichi Nuclear Power Plant, Fuel bundle degradation , Zircaloy4, SUS316, Inconel718

Isothermal annealing test with diffusion couples of Zircaloy4/SUS316 and Zircaloy4/Inconel718 was performed to investigate the liquefaction mechanism which could follow the degradation BWR-type fuel bundle under severe accident conditions. The specimens after test were analyzed with SEM/EDS and powder XRD measurement to investigate the morphology and phase of reaction products.