Open AccessMaximum total organic carbon limits at different DWPF melter feed maters (U)
Author(s) -
An-Seop Choi
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/437776
Subject(s) - flammable liquid , flammability limit , environmental science , carbon fibers , flammability , materials science , nuclear engineering , environmental chemistry , combustion , waste management , chemistry , composite number , composite material , organic chemistry , engineering
The document presents information on the maximum total organic carbon (TOC) limits that are allowable in the DWPF melter feed without forming a potentially flammable vapor in the off-gas system were determined at feed rates varying from 0.7 to 1.5 GPM. At the maximum TOC levels predicted, the peak concentration of combustible gases in the quenched off-gas will not exceed 60 percent of the lower flammable limit during a 3X off-gas surge, provided that the indicated melter vapor space temperature and the total air supply to the melter are maintained. All the necessary calculations for this study were made using the 4-stage cold cap model and the melter off-gas dynamics model. A high-degree of conservatism was included in the calculational bases and assumptions. As a result, the proposed correlations are believed to by conservative enough to be used for the melter off-gas flammability control purposes