EFRT M-12 Issue Resolution: Caustic-Leach Rate Constants from PEP and Laboratory-Scale Tests

Abstract

Revision Number Interim Change No. Effective Date Description of Change 0 0 8/14/09 Initial issue. Appendix C: Corrected a typographical error in Equation (C.1). As a response to a September 2009 CRESP review comment, revised the appendix to further explain the way in which the Monte Carlo method was applied and to reference information on the technical basis of the analytical uncertainties that were used.

Pretreatment Engineering Platform Phase 1 Final Test Report

“…This R&T condition is discussed in Mahoney et al (2009) and Section 9 of this report for caustic leaching. It is discussed in Rapko et al (2009) and Section 11 in this report for oxidative leaching.…”

“…Pretreatment Engineering Platform operations were evaluated by Mahoney et al (2009) against these guidelines. It was concluded that, to the extent that the PEP design and operation allowed, caustic leaching for Integrated Test A was prototypic of the PTF.…”

“…The cause was found to be unreasonably low aluminum concentrations in the initial slurry, possibly the result of measurements that were biased low. In the Integrated Tests, multiple measurements of initial aluminum concentration were available to allow cross-checking (as discussed in Section 4.2.1 of Mahoney et al (2009). These cross-checks were not available in the Functional Tests.…”

“…The caustic-leach results for the PEP and the laboratory-scale results are compared, and scale-up factors have been calculated for the kinetic rate constant as discussed by Mahoney et al (2009) in Section 4.3 and Section 9.5 of this report. Uncertainties were calculated using a Monte Carlo approach.…”

PEP Support Laboratory Leaching and Permeate Stability Tests

“…There were two tests for PEP Test D with different amounts of permanganate added (Section 6.5). The analysis of test results presented in this section is reported in WTP-RPT-186 (Mahoney et al 2009) and WTP-RPT-188 (Rapko et al 2009). Integrated PEP Test C was deleted from the scope of the testing (ICN-TP-RPP-WTP-506_R0.2).…”