Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement
Apstrakt
Traditional methods of processing evaporator concentrates from NPP are evaporation and cementation. These methods allow to transform a liquid radioactive waste into a more inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste composition, the leaching of (137)Cs from immobilized radioactive evaporator concentrate into a surrounding fluid has been studied. Leaching tests were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching test are critically important in leach studies since the extent of hydration of the cement materials determines how much hydration product develops and whether it is available to block the pore network, thereby reducing leaching. Incremental leaching rates R(n)(cm/d) of (137)Cs from evaporator concentrates after 180 days were measured. The results presented in this paper are examples of results obtained in a 20-year concrete testing projec...t which will influence the design of the engineer trenches system for future central Serbian radioactive waste storing center.
Ključne reči:
Cement / Radioactive Waste / Radionuclide / Leaching / concreteIzvor:
2010, 369-371Napomena:
- Proceedings of the 12th International Conference on Environmental Remediation and Radioactive Waste Management, Oct 11-15, 2009, Liverpool, England
Kolekcije
Institucija/grupa
VinčaTY - CONF AU - Plećaš, Ilija B. AU - Dimović, Slavko PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6913 AB - Traditional methods of processing evaporator concentrates from NPP are evaporation and cementation. These methods allow to transform a liquid radioactive waste into a more inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste composition, the leaching of (137)Cs from immobilized radioactive evaporator concentrate into a surrounding fluid has been studied. Leaching tests were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching test are critically important in leach studies since the extent of hydration of the cement materials determines how much hydration product develops and whether it is available to block the pore network, thereby reducing leaching. Incremental leaching rates R(n)(cm/d) of (137)Cs from evaporator concentrates after 180 days were measured. The results presented in this paper are examples of results obtained in a 20-year concrete testing project which will influence the design of the engineer trenches system for future central Serbian radioactive waste storing center. T1 - Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement SP - 369 EP - 371 UR - https://hdl.handle.net/21.15107/rcub_vinar_6913 ER -
@conference{ author = "Plećaš, Ilija B. and Dimović, Slavko", year = "2010", abstract = "Traditional methods of processing evaporator concentrates from NPP are evaporation and cementation. These methods allow to transform a liquid radioactive waste into a more inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste composition, the leaching of (137)Cs from immobilized radioactive evaporator concentrate into a surrounding fluid has been studied. Leaching tests were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching test are critically important in leach studies since the extent of hydration of the cement materials determines how much hydration product develops and whether it is available to block the pore network, thereby reducing leaching. Incremental leaching rates R(n)(cm/d) of (137)Cs from evaporator concentrates after 180 days were measured. The results presented in this paper are examples of results obtained in a 20-year concrete testing project which will influence the design of the engineer trenches system for future central Serbian radioactive waste storing center.", title = "Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement", pages = "369-371", url = "https://hdl.handle.net/21.15107/rcub_vinar_6913" }
Plećaš, I. B.,& Dimović, S.. (2010). Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement. , 369-371. https://hdl.handle.net/21.15107/rcub_vinar_6913
Plećaš IB, Dimović S. Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement. 2010;:369-371. https://hdl.handle.net/21.15107/rcub_vinar_6913 .
Plećaš, Ilija B., Dimović, Slavko, "Curing Time Effect on the Fraction of (137)Cs from Immobilized Radioactive Evaporator Sludge By Cement" (2010):369-371, https://hdl.handle.net/21.15107/rcub_vinar_6913 .