Corrosion Resistance of Chernobyl NPP Lava Fuel-Containing Masses
Yu A. Olkhovyk,
Michael I. Ojovan.
Chernobyl NPP (ChNPP) lava fuel-containing masses (LFCM) chemical composition and
properties are analysed with emphasis on corrosion resistance. It is shown that LFCM need additional
conditioning because of changes occur and overall low corrosion resistance. The expedience to vitrify
ChNPP LFCM is discussed with an optimal conditioning method which would combine joint
vitrification of ChNPP LFCM and boron-containing liquid radioactive waste (salt cake) from NPP using cold crucible
melters (CCM). Glass corrosion resistance is analysed with focus on alkali-borosilicate glasses typical for nuclear waste
immobilisation. Radiation effects are discussed including self-heating which is found small at expected sizes of waste
canisters. The impact of radiation-induced effects in glasses is also considered.
Keywords: Borosilicate glass, glass corrosion, high-level waste, lava fuel-containing masses, liquid radioactive waste,
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