SACRIFICIAL CERAMIC MATERIAL FOR A CORE CATCHER OF A NUCLEAR REACTOR FISSILE REGION MOLTEN CORIUM Russian patent published in 2005 - IPC

FIELD: atomic power engineering; compositions of materials for atomic power engineering.

SUBSTANCE: the invention is pertaining to the compositions of materials for atomic power engineering and is intended to ensure localization of a molten corium of a carcass water-cooled nuclear reactor fissile region at a non-projected emergency with a molten corium outlet from the reactor carcass. The sacrificial ceramic material for a core catcher of the molten corium of the nuclear reactor fissile region includes the basic composition made out of ferric oxide Fe₂O₃ or a mixture of ferric oxide_{Fe2O3 with 10-33 mass % of aluminum oxideAl2O3 and the additive of a metal oxide of metal with the general formula MeO, chosen from the following row of: CuO, NiO, CoO, or manganese oxideMnO2, and a moderator of neutrons - gadolinium oxide Gd2O3 at the following ratio of ingredients (in mass %): 1)Fe2O3 - 60-95, MeO - 5-40 orMnO2 - 10-40,Gd2O3 - 0.1-0.2 above 100% or 2)Fe2O3 - 47-85,Al2O3 - 10-33, MeO - 6-20 orMnO2 - 7.5-17,Gd2O3 - 0.1-0.2 above 100 %. The technical result of the invention is production of a ceramic material, which equally actively oxidizes all metallic components of the molten corium (zirconium, chrome, iron) and in a liquid state is unrestrictedly mixed with the oxide components of the molten corium.}

EFFECT: the invention ensures production of a ceramic material, which equally actively oxidizes all metallic components of the molten corium and in a liquid state is unrestrictedly mixed with the oxide components of the molten corium.

2 cl, 1 tbl, 3 dwg