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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
고상소결에 의한 방사성 희토류산화물의 고화
Immobilization of Radioactive Rare Earth oxide Waste by Solid Phase Sintering
Abstract
In the pyroprocessing of spent nuclear fuels, LiCl-KCl waste salt containing radioactive rare earth chlorides are generated. The radioactive rare earth oxides are recovered by co-oxidative precipitation of rare earth elements. The powder phase of rare eath oxide waste must be immobilized to produce a monolithic wasteform suitable for storage and ultimate disposal. The immobilization of these waste developed in this study involves a solid state sintering of the waste with host borosilicate glass and zinc titanate based ceramic matrix(ZIT). And the rare-earth monazite which synthesised by reaction of ammonium di-hydrogen phosphate with the rare earth oxides waste, were immobilzed with the borosilicate glass. It is shown that the developed ZIT ceramic wasteform is highly resistant the leaching process, high density and thermal conductivity.
희토류 산화물, 고화, 고상 소결, 붕규산 유리, 모나자이트, rare earth oxide, immobilization, solid phase sintering, monazite, borosilicate glass
Reference
JNFCWT
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Korean Radioactive
Waste Society (KRS)
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