Preliminary engineering and economic analysis of the fixation of high-level radioactive wastes in concrete

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Sensors ◽

10.3390/s17061377 ◽

2017 ◽

Vol 17 (6) ◽

pp. 1377 ◽

Cited By ~ 17

Author(s):

Sylvie Delepine-Lesoille ◽

Sylvain Girard ◽

Marcel Landolt ◽

Johan Bertrand ◽

Isabelle Planes ◽

...

Keyword(s):

Optical Fibre ◽

State Of The Art ◽

Radioactive Wastes ◽

Intermediate Level ◽

Optical Fibre Sensors ◽

High Level

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High Efficiency Combined Aggregate – Submerged Combustion Melter–Electric Furnace for Vitrification of High-Level Radioactive Wastes

12th International Conference on Nuclear Engineering, Volume 3 ◽

10.1115/icone12-49298 ◽

2004 ◽

Cited By ~ 1

Author(s):

L. S. Pioro ◽

I. L. Pioro

Keyword(s):

Electric Furnace ◽

High Efficiency ◽

High Capacity ◽

Main Idea ◽

Melting Process ◽

Radioactive Wastes ◽

Single Stage ◽

Interface Surface ◽

High Level ◽

Submerged Combustion

It is well known that high-level radioactive wastes (HLRAW) are usually vitrified inside electric furnaces. Disadvantages of electric furnaces are their low melting capacity and restrictions on charge preparation. Therefore, a new concept for a high efficiency combined aggregate – submerged combustion melter (SCM)–electric furnace was developed for vitrification of HLRAW. The main idea of this concept is to use the SCM as the primary high-capacity melting unit with direct melt drainage into an electric furnace. The SCM employs a single-stage method for vitrification of HLRAW. The method includes concentration (evaporation), calcination, and vitrification of HLRAW in a single-stage process inside a melting chamber of the SCM. Specific to the melting process is the use of a gas-air or gas-oxygen-air mixture with direct combustion inside a melt. Located inside the melt are high-temperature zones with increased reactivity of the gas phase, the existence of a developed interface surface, and intensive mixing, leading to intensification of the charge melting and vitrification process. The electric furnace clarifies molten glass, thus preparing the high-quality melt for subsequent melt pouring into containers for final storage.

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