Dry halide method for separating the components of spent nuclear fuels
Abstract
The invention is a nonaqueous, single method for processing multiple spent nuclear fuel types by separating the fission and transuranic products from the nonradioactive and fissile uranium product. The invention has four major operations: exposing the spent fuels to chlorine gas at temperatures preferably greater than 1200 C to form volatile metal chlorides; removal of the fission product chlorides, transuranic product chlorides, and any nickel chloride and chromium chloride in a molten salt scrubber at approximately 400 C; fractional condensation of the remaining volatile chlorides at temperatures ranging from 164 to 2 C; and regeneration and recovery of the transferred spent molten salt by vacuum distillation. The residual fission products, transuranic products, and nickel- and chromium chlorides are converted to fluorides or oxides for vitrification. The method offers the significant advantages of a single, compact process that is applicable to most of the diverse nuclear fuels, minimizes secondary wastes, segregates fissile uranium from the high level wastes to resolve potential criticality concerns, segregates nonradioactive wastes from the high level wastes for volume reduction, and produces a common waste form glass or glass-ceramic. 3 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 672516
- Patent Number(s):
- 5774815
- Application Number:
- PAN: 8-696,187; TRN: 99:001061
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- DOE Contract Number:
- AC07-94ID13223
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 30 Jun 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 05 NUCLEAR FUELS; SPENT FUELS; REPROCESSING; CHLORINE; URANIUM CHLORIDES; VAPOR CONDENSATION; MOLTEN SALTS; REGENERATION; VACUUM DISTILLATION; FLUORIDES; OXIDES; SYNTHESIS; VITRIFICATION; HIGH-LEVEL RADIOACTIVE WASTES
Citation Formats
Christian, J D, Thomas, T R, and Kessinger, G F. Dry halide method for separating the components of spent nuclear fuels. United States: N. p., 1998.
Web.
Christian, J D, Thomas, T R, & Kessinger, G F. Dry halide method for separating the components of spent nuclear fuels. United States.
Christian, J D, Thomas, T R, and Kessinger, G F. Tue .
"Dry halide method for separating the components of spent nuclear fuels". United States.
@article{osti_672516,
title = {Dry halide method for separating the components of spent nuclear fuels},
author = {Christian, J D and Thomas, T R and Kessinger, G F},
abstractNote = {The invention is a nonaqueous, single method for processing multiple spent nuclear fuel types by separating the fission and transuranic products from the nonradioactive and fissile uranium product. The invention has four major operations: exposing the spent fuels to chlorine gas at temperatures preferably greater than 1200 C to form volatile metal chlorides; removal of the fission product chlorides, transuranic product chlorides, and any nickel chloride and chromium chloride in a molten salt scrubber at approximately 400 C; fractional condensation of the remaining volatile chlorides at temperatures ranging from 164 to 2 C; and regeneration and recovery of the transferred spent molten salt by vacuum distillation. The residual fission products, transuranic products, and nickel- and chromium chlorides are converted to fluorides or oxides for vitrification. The method offers the significant advantages of a single, compact process that is applicable to most of the diverse nuclear fuels, minimizes secondary wastes, segregates fissile uranium from the high level wastes to resolve potential criticality concerns, segregates nonradioactive wastes from the high level wastes for volume reduction, and produces a common waste form glass or glass-ceramic. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {6}
}