High-level waste, extraction

The geologic aspects of waste disposal (24—26), proceedings of an annual conference on high level waste management (27), and one from an annual conference on all types of radioactive waste (28) are available. An alternative to burial is to store the spent fuel against a long-term future energy demand. Uranium and plutonium contained in the fuel would be readily extracted as needed. [Pg.230]

Route all neptunium as Np(V) to the high-level waste in the first extraction cycle... [Pg.526]

Several tests using countercurrent separation in mixer-settler or centrifugal extractors with simulated and genuine high-level waste showed that the recovery of An(III, IV, VI) is quantitative. The back extraction of An(III) was complete. These early flow sheets were not designed to strip U(VI) and Pu(IV). The distribution ratios of these ions at low acidities are lower than those measured with CMPO and one can guess that the stripping... [Pg.535]

Feed to solvent extraction High-level aqueous waste... [Pg.482]

The primary separation of plutonium and uranium from the fission products involves a solvent extraction with 30 vol % TBP at room temperature. The activity levels in this separation are quite high ( 1700 Ci/L for the fission products) and the aqueous waste, which contains 99+% of the fission products, is a high-level waste. Am and Cm are not extracted and Np is partially extracted. Because of the high radiation levels, there are radiolysis problems with TPB, leading to solvent degradation. Primary products of the radiolysis of TBP are the dibutyl- and monobutylphosphoric acids along with phosphoric acid. These degradation products are removed in the solvent purification steps. [Pg.483]

Chitnis, R.R., Wattal, P.K., Ramanujam, A. et al. 1999. Recovery of actinides extracted by TRUEX solvent from high-level waste using complexing agents II. Counter-current studies. J. Radioanal. Nucl. Chem. 240 (3) 727-730. [Pg.48]

Liu, X., Liang, J., Xu, J. 2004. Simplified Chinese TRPO process to extract and recover transuranium elements from high-level waste. Solvent Extr. Ion Exch. 22 (2) 163-173. [Pg.52]

Dhami, P.S., Chitnis, R.R., Gopalakrishnan, V. et al. 2001. Studies on the partitioning of actinides from high level waste using a mixture of HDEHP and CMPO as extractant. [Pg.57]

Moyer, B.A., Bazelaire, E., Bonnesen, P.V. et al. 2005. Next generation extractants for cesium separation from high-level waste From fundamental concepts to site implementation. FY 2005 Annual Report, Environmental Management Science Program, Project 73803. [Pg.60]

Ansari, S.A. Pathak, P.N. Manchanda, V.K. Husain, M. Prasad, A.K. Parmar, V.S. N,N,N ,N -Tetraoctyl diglycolamide (TODGA) A promising extractant for actinidepartitioning from high-level waste (HLW), Solvent Extr. Ion Exch. 23 (2005) 463-479. [Pg.107]

Mathur, J.N. Murali, M.S. Iyer, R.H. Ramanujam, A. Dhami, P.S. Gopalkrishnan, V. Rao, M.K. Badheka, L.P. Baneiji, A. Extraction chromatographic separation of minor actinides from purex high-level wastes using CMPO, Nucl. Technol. 109 (1995) 216-225. [Pg.113]

Naik, P.W. Dhami, P.S. Misra, S.K. Jambunathan, U. Mathur, J.N. Use of organo-phosphorus extractants impregnated on silica gel for the extraction chromatographic separation of minor actinides from high level waste solutions, J. Radioanal. Nucl. Chem. 257 (2003) 327-332. [Pg.114]

Sharma, J.N., Suri, A.K., Manohar, S., Chitnis, R.R., Shah, G.J., Wattal, P.K. 2004. Solvent extraction studies of synthetic high level waste using novel extractant tetra (2-ethylhexyl) dilycolamide (TEHDGA). SESTEC-2004 Emerging Trends in Separation Science and Technology, July, Mumbai, India. [Pg.188]

Delmau proposed the combined extraction of cesium and strontium from caustic wastes by adding a crown ether and a carboxylic acid to the CSSX solvent.126 The classical DtBuC18C6 and one carboxylic acid were combined with the components of the CSSX solvent optimized for the extraction of cesium, allowing for the simultaneous extraction of cesium and strontium from alkaline nitrate media simulating alkaline high-level wastes present at the SRS. The promising results of these batch tests showed that the system could reasonably be tested on actual waste. [Pg.244]

L. H. Delmau, P. V. Bonnesen, G. J. Van Berkel and B. A. Moyer, Improved performance of the alkaline-side CSEX process for cerium extraction from alkaline high-level waste obtained by characterization of the effect of surfactant impurities, ORNL/TM-1999/209, ORNL, USA, 1999. [Pg.314]

M. A. Norato, M. H. Beasley, S. G. Campbell, A. D. Coleman, M. W. Geeting, J. W. Guthrie, C. W. Kennell, R. A. Pierce, R. C. Ryberg, D. D. Walker, J. D. Law and T. A. Todd, Demonstration of the caustic-side solvent extraction process for the removal of 137Cs from Savannah River Site high level waste, WSRC-MS-2001-00201 Report,... [Pg.314]

Shishkin, D.N., Galkin, B.Ya.,Fedorov,Yu.S.,Zilberman, B.Ya.,Shmidt,O.V.Partitioning of high-level waste with an extractant based on chlorinated cobalt dicarbollide and dibu-tylphosphoric acid zirconium salt. Radiochemistry (2003), 45 (6), 577-580. [Pg.378]

Campbell, S. G., M. W. Geeting, C. W. Kennell, et al. 2001. Demonstration of Caustic-side Solvent Extraction with Savannah River Site High Level Waste. Westinghouse Savannah River Company Report WSRC-TR-2001-00223, Aiken, SC. [Pg.613]

High-level waste is the aqueous wastes resulting from operation of a first-cycle solvent extraction system, or equivalent, and concentrated wastes from subsequent extraction cycles, or equivalent, in a facility for fuel reprocessing. [Pg.176]

Wilmarth, W. R., Mills, J. T., Dukes, V. H., Beasley, M. C., Coleman, A. D., Diprete, C. C., and Diprete, D. P. Caustic-side Solvent Extraction Batch Distribution Coefficient Measurements for Savannah River Site High-level Wastes, Sep. Sci. Technol. 38(12,13) (2003), 2637-2645. [Pg.402]

Birdwell, J. F., Jr., Counce, R. M., and Slater, C. O. Conceptual Design of a Simplified Skid-Mounted Caustic-Side Solvent Extraction Process for Removal of Cesium from Savannah River Site High-Level Waste, Report ORNL/TM-2004/59, Oak Ridge National Laboratory, Oak Ridge, TN, May 2004. [Pg.404]

Delmau, L. H., Van Berkel, G. J., Bonnesen, P. V., and Moyer, B. A. Improved Performance of the Alkaline-Side CSEX Process for Cesium Extraction from Alkaline High-Level Waste Obtained by Characterization of the Effect of Surfactant Impurities, Report ORNIVTM-1999/209, Oak Ridge National Laboratory, Oak Ridge, TN, 1999. [Pg.405]

Norato, M. A., Cambell, S. G., Crowder, M. L., Geeting, M. W., Kessinger, G. F., Pierce, R. A., and Walker, D. D. High-Level Waste Demonstration of the Caustic-Side Solvent Extraction Process with Optimized Solvent in the 2-cm Centrifugal Contactor Apparatus Using Tank 37H/44F Supemate, Report WSRC-TR-2002-00243, Rev. 0, Westinghouse Savannah River Company, Aiken, SC, November 1, 2002. [Pg.405]

Svantesson, I. Hagstrom, I. Persson, G. Liljenzin, J. 0., "Distribution Ratios and Empirical Equations for the Extraction of Elements in Purex High Level Waste Solution,... [Pg.216]

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