Targeting and Estimating Waste Loadings at DWPF: A Sensitvity Analysis

THOMAS, EDWARDS

Savannah River Site (S.C.)

关键词: Evaporators;    Waste Processing;    Processing;    Targets;    Wastes;   

DOI  :  10.2172/839357
RP-ID  :  WSRC-TR-2004-00508
RP-ID  :  AC09-96SR18500
RP-ID  :  839357

美国|英语

来源: UNT Digital Library

【 摘 要 】

Waste Loading (WL) is a measure (expressed as a percentage) of the Defense Waste Processing Facility (DWPF) glass product that comes from high level waste. In this report, the DWPF calculations used to target WL during blending decisions and those used to estimate WL during processing are investigated to assess the sensitivities of these calculations to the random uncertainties of their inputs. For the calculations used to target WLs, the uncertainties in the inputs lead to an uncertainty, at approximately 95 per cent confidence, in the targeted WL of plus or minus 1.05 to plus or minus 1.75 percentage points depending on how the random errors in the inputs are represented. For the calculations used to estimate the WL for a given Slurry Mix Evaporator (SME) batch, the random uncertainties of the inputs to this calculation lead to an uncertainty, at approximately 95 per cent confidence, in the estimated WL of plus or minus 1.50percentage points. Since one would expect to see agreement b etween the WL calculations of the targeting process and the WL calculations of the estimating process, comparisons between these WLs for SME batches 234 through 265 were conducted. The comparisons suggested that the targeted WLs and estimated WLs for these batches did not track each other as closely aswould be expected based upon their random variations as outlined in this report.