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Title: Molten salt destruction process for mixed wastes

Abstract

We are developing an advanced two-stage process for the treatment of mixed wastes, which contain both hazardous and radioactive components. The wastes, together with an oxidant gas, such as air, are injected into a bed of molten salt comprising a mixture of sodium-, potassium-, and lithium-carbonates, with a melting point of about 580{degree}C. The organic constituents of the mixed waste are destroyed through the combined effect of pyrolysis and oxidation. Heteroatoms. such as chlorine, in the mixed waste form stable salts, such as sodium chloride, and are retained in the melt. The radioactive actinides in the mixed waste are also retained in the melt because of the combined action of wetting and partial dissolution. The original process, consists of a one-stage unit, operated at 900--1000{degree}C. The advanced two-stage process has two stages, one for pyrolysis and one for oxidation. The pyrolysis stage is designed to operate at 700{degree}C. The oxidation stage can be operated at a higher temperature, if necessary.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10178077
Report Number(s):
UCRL-JC-112666; CONF-930873-21
ON: DE93018641; TRN: 93:018991
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 2. international mixed waste symposium,Baltimore, MD (United States),17-20 Aug 1993; Other Information: PBD: Apr 1993
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; LOW-LEVEL RADIOACTIVE WASTES; RADIOACTIVE WASTE PROCESSING; HAZARDOUS MATERIALS; MOLTEN SALT WASTE GASIFICATION PROCESS; MOLTEN SALTS; PYROLYSIS; OXIDATION; ACTINIDES; ORGANIC COMPOUNDS; 052001; WASTE PROCESSING

Citation Formats

Upadhye, R S, Wilder, J G, and Karlsen, C E. Molten salt destruction process for mixed wastes. United States: N. p., 1993. Web.
Upadhye, R S, Wilder, J G, & Karlsen, C E. Molten salt destruction process for mixed wastes. United States.
Upadhye, R S, Wilder, J G, and Karlsen, C E. 1993. "Molten salt destruction process for mixed wastes". United States. https://www.osti.gov/servlets/purl/10178077.
@article{osti_10178077,
title = {Molten salt destruction process for mixed wastes},
author = {Upadhye, R S and Wilder, J G and Karlsen, C E},
abstractNote = {We are developing an advanced two-stage process for the treatment of mixed wastes, which contain both hazardous and radioactive components. The wastes, together with an oxidant gas, such as air, are injected into a bed of molten salt comprising a mixture of sodium-, potassium-, and lithium-carbonates, with a melting point of about 580{degree}C. The organic constituents of the mixed waste are destroyed through the combined effect of pyrolysis and oxidation. Heteroatoms. such as chlorine, in the mixed waste form stable salts, such as sodium chloride, and are retained in the melt. The radioactive actinides in the mixed waste are also retained in the melt because of the combined action of wetting and partial dissolution. The original process, consists of a one-stage unit, operated at 900--1000{degree}C. The advanced two-stage process has two stages, one for pyrolysis and one for oxidation. The pyrolysis stage is designed to operate at 700{degree}C. The oxidation stage can be operated at a higher temperature, if necessary.},
doi = {},
url = {https://www.osti.gov/biblio/10178077}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 01 00:00:00 EST 1993},
month = {Thu Apr 01 00:00:00 EST 1993}
}

Conference:
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