New Removable Small Melter Equipped with a Bottom Drain System Developed at the Mayak Production Association for Immobilization of HLW in Borosilicate Glass
https://doi.org/10.56304/S2304487X21020097
Abstract
The current status of the technology for vitrification of high-level waste at the Radiochemical Plant of the Mayak Production Association has been described. Conceptual and technical solutions related to development of the technology for vitrification of different types of liquid HLW at the Mayak Production Association in the short and long terms have been considered. Problems of the Radiochemical Plant and their possible solutions, as well as main technical differences of the promising removable small-size melter from facilities used at the Mayak Production Association earlier, have been described. The maximum water evaporation capacity of the melter and its production capacity have been determined in terms of initial solution containing fluxing additives (sodium carbonate and borax) at simultaneous feeding of dry glass frit into the melter. The optimal conditions have been identified for molten glass discharge and for stopping the glass flow discharge for the second melter prototype. The performance of the system for dosing dry reacting agents and glass frit has been tested. The study includes two experiments on sedimentation and discharge of spherical metal powder simulating the disperse phase of noble metals, which are contained in HLW resulted from SNF reprocessing. A series of three discharge procedures characterized by a stepwise increase in the viscosity and temperature of glass melting by means of feeding the glass frit without fluxing solution have been performed. The thermophysical characteristics of the brickwork and studied electric parameters of the melter operation have been obtained. Process monitoring and control systems have been developed. The viscosity and chemical stability of the applied glass composition have been determined.
About the Authors
S. М. Shaydullin
Mayak Production Association; Seversk Institute of Technology, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
456784
636036
Chelyabinskaya oblast
Ozersk
Tomskaya oblast
Seversk
М. B. Remizov
Mayak Production Association
Russian Federation
Russian Federation
456784
Chelyabinskaya oblast
Ozersk
P. V. Kozlov
Mayak Production Association; Ozyorsk Institute of Technology, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
456784
456783
Chelyabinskaya oblast
Ozersk
А. B. Melent’ev
Mayak Production Association
Russian Federation
Russian Federation
456784
Chelyabinskaya oblast
Ozersk
К. V. Verbitskiy
Mayak Production Association
Russian Federation
Russian Federation
456784
Chelyabinskaya oblast
Ozersk
D. I. Bendasov
Mayak Production Association
Russian Federation
Russian Federation
456784
Chelyabinskaya oblast
Ozersk
М. А. Rebrin
Mayak Production Association
Russian Federation
Russian Federation
456784
Chelyabinskaya oblast
Ozersk
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Review
For citations:
Shaydullin S.М., Remizov М.B., Kozlov P.V., Melent’ev А.B., Verbitskiy К.V., Bendasov D.I., Rebrin М.А. New Removable Small Melter Equipped with a Bottom Drain System Developed at the Mayak Production Association for Immobilization of HLW in Borosilicate Glass. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2021;10(2):183-190. (In Russ.) https://doi.org/10.56304/S2304487X21020097
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