Development of a Nitric/Formic Acid process to reduce hydrogen emissions during sludge treatment in the DWPF [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 24 pages : digital, PDF file
Additional Creators:: Westinghouse Savannah River Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A new Nitric/Formic Acid (N/FA) flowsheet was developed at the Savannah River Technology Center (SRTC) for use in the Chemical Processing Cell (CPC) of the Defense Waste Processing Facility (DWPF). The flowsheet was successfully demonstrated with simulated sludge using a 2 L bench-scale experimental system and a one-fifth scale (4000 L) pilot facility, and with actual radioactive waste using a 0.1 L apparatus in one of the SRTC shielded cells. Overall, the new N/FA flowsheet compared to the original formic add flowsheet reduced the peak H₂ generation rate by more than a factor of two and resulted in a more gradual rise in the H₂ evolution. Therefore, implementation of the new N/FA flowsheet in the DWPF CPC would result in an increased margin of safety and possibly a reduction in the scope and cost of modifying the DWPF CPC vessel vent system. Also, the new N/FA flowsheet would be compatible with Tank Farm processes and other DWPF flowsheets, and with the implementation of the new Late Wash flowsheet in the DWPF, it would be key to maintaining a proper redox balance of the melter feed.

Report Numbers:

E 1.99:wsrc-ms--93-021
E 1.99: conf-930205--81
conf-930205--81
wsrc-ms--93-021

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Note:

Published through SciTech Connect.
09/01/1993.
"wsrc-ms--93-021"
" conf-930205--81"
"DE93040180"
Waste management `93,Tucson, AZ (United States),28 Feb - 4 Mar 1993.
Ritter, J.A.; Hsu, C.W.; Bibler, N.E.; Ferrara, D.M.; Ha, B.C.

Funding Information:

AC09-89SR18035

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