Measurement of Offgas Species from Thermal Decomposition of Simulated DWPF Melter Feed
- Savannah River National Laboratory (SRNL), Aiken, SC (United States)
A better understanding of the decomposition process in the DWPF melter is desired to improve the melter offgas flammability model. Antifoam in DWPF is of interest because its presence contributes to the flammability of the melter offgas via formation of flammable gas species. Simulant formic/nitric and glycolic/nitric flowsheet SRAT/SME (melter feed) products were studied at several antifoam concentrations. In addition, redox measurements were compared to the offgas generation data to aid in the overall understanding of the feed decomposition process in the DWPF. A new method for quantitatively measuring the offgas species from simulated DWPF melter feed during heating was used to measure the offgas as a function of temperature. Results indicated that the form of the antifoam (degraded, pristine, or a surrogate) had a negligible effect on the offgas composition (including H2 generation) or glass redox for the SB8 formic/nitric flowsheet. Antifoam concentration in the glycolic/nitric flowsheet feed had a negligible effect on the offgas composition (including H2 generation) and glass redox. The glycolic/nitric flowsheet feed had significantly less (~ ¼) total H2 generation in the offgas during melting compared to the formic/nitric flowsheet and is thought to be related to different reaction paths among the flowsheets.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States); Savannah River National Laboratory (SRNL), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC09-08SR22470
- OSTI ID:
- 1154719
- Report Number(s):
- SRNL--STI-2014-00286
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interim glycol flowsheet reduction/oxidation (redox) model for the Defense Waste Processing Facility (DWPF)
Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility
Actual Waste Demonstration of the Nitric-Glycolic Flowsheet for Sludge Batch 9 Qualification
Technical Report
·
Mon Mar 07 23:00:00 EST 2016
·
OSTI ID:1244066
Antifoam Development for Eliminating Flammability Hazards and Decreasing Cycle Time in the Defense Waste Processing Facility
Technical Report
·
Tue May 12 00:00:00 EDT 2020
·
OSTI ID:1630277
Actual Waste Demonstration of the Nitric-Glycolic Flowsheet for Sludge Batch 9 Qualification
Technical Report
·
Thu Sep 01 00:00:00 EDT 2016
·
OSTI ID:1323879