Experimental evaluation of Sr and Ba distribution in ex-vessel debris under a temperature gradient

Chemical species of cesium and iodine in condensed vaporized microparticles formed by melting nuclear fuel components with concrete materials

“…Following the melting experiments, micrometer-sized particles were deposited on the surface of the bell jar melt furnace (through discussion with Takano et al , on ref. 43, 49 and 50). In their experiments, neither Cs nor I was added to the pellets.…”

“…Analyses of the FNPP accident [41][42][43][44][45][46][47] focused on the components of the fuels, stainless steel, and control blades but not on the condensed vaporized materials. Simulation analysis revealed that the chemical species of Cs and I generated during the severe accident was CsI, which may transform to CsOH in the presence of steam in a container vessel.…”

“…Simulation analysis revealed that the chemical species of Cs and I generated during the severe accident was CsI, which may transform to CsOH in the presence of steam in a container vessel. 48 Takano et al 43,49,50 conducted melting experiments using pellets containing Zr, ZrO 2 , or (U,Zr)O 2 by light-concentrated heating using a halogen lamp in a bell jar furnace and found that the pellets were completely melted under an Ar atmosphere. Following the melting experiments, micrometer-sized particles were deposited on the surface of the bell jar melt furnace (through discussion with Takano et al, on ref.…”