Cesium, strontium and sodium diffusion in magnesium kalium phosphates system

• Main Authors: Dikiy, N.P., Dovbnya, A.N., Lyashko, Yu.V., Medvedev, D.V., Medvedeva, E.P., Repikhov, O.A., Saenko, S.Y., Shkuropatenko, V.A., Tarasov, R.V., Fedorets, I.D., Khlapova, N.P.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2014
• Series: Вопросы атомной науки и техники
• Subjects: Ядерно-физические методы и обработка данных
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/80505

Nuclear-physical methods have been used for determination of diffusion coefficient of Cs, Na, Sr and Ga in samples on the basis of Ceramicrete which contained simulators of a liquid radioactive waste of "Hanford-1", KW and KE Basin sludge, 10% wollastonite and 0.3% of boric acid. After an irradiation of investigated samples by electrons and brake radiation to a dose 100 and 1 MGy, accordingly, leaching was conducted at temperature 37°C. Values of diffusion coefficient of Cs, Sr, Na changed in process of leaching from units of 10⁻¹⁰ cm²/s till 10⁻¹⁶ ... 10⁻¹⁷ cm²/s, for Ga - from units of 10⁻¹³ cm²/s to 10⁻¹⁶ cm²/s. Decreasing of weight of ceramics in process of leaching during 858 hours irradiated by electrons to a dose 100 MGy, on 14.6 and 18.5% with simulators KE and KW is revealed, accordingly. Decreasing of weight of ceramics in process of leaching during 858 hours, irradiated brake radiation to a dose 1 MGy, on 19.9 and 21.6% with simulators KW and KE, accordingly is revealed. The sums of relations of diffusion coefficient of Na concerning Cs and Sr are in antagonistic dependence on the Cs and Sr content in a matrix on the basis of Ceramicrete.