After each dissolution campaign, the supernate created must be qualified prior to processing through the TCCR system. Prior to operation of TCCR, Tank 10H must undergo dissolution campaigns, dissolving the salt cake to form an aqueous salt solution (supernate). Tank 10H is serving a dual function as both the salt dissolution tank as well as the feed tank for the TCCR system. Master phlo series#The TCCR unit is an at-tank set of four more » ion exchange columns, with two typically being operated in series during waste processing. CST primarily removes cesium from the high sodium alkaline feed, but also adsorbs strontium, actinides, and some other trace metals. This is a full-scale demonstration of the use of Crystalline Silicotitanate (CST) for the decontamination of aqueous nuclear waste supernate. Transfers out of Tank 11H are then disposed of on site as a grout wasteform in the SRS Saltstone Processing Facility. The Tank Closure Cesium Removal (TCCR) process at the Savannah River Site (SRS) is currently processing waste from Tank 10H, generating decontaminated salt solution that is sent to Tank 11H. Alternatively, the invention could be applied to decontamination of acidic reprocessing wastes containing cesium-137. An important application for this invention would be treatment of alkaline nuclear tank wastes. No pre-treatment of the waste solution is necessary, and the cesium can be recovered using a safe and inexpensive stripping process using water, dilute (millimolar) acid solutions, or dilute (millimolar) salt solutions. This combined extraction and stripping method is especially useful as a process for more » removal of the radionuclide cesium-137 from highly alkaline waste solutions which are also very concentrated in sodium and potassium. The cesium values are subsequently recovered from the extractant, and the solvent subsequently recycled, by contacting the Cs-containing organic solution with an aqueous stripping solution. The method entails contacting an aqueous Cs-containing solution with a solvent consisting of a specific class of lipophilic calixarene-crown ether extractants dissolved in a hydrocarbon-based diluent containing a specific class of alkyl-aromatic ether alcohols as modifiers. of Energy DOE Contract Number: FG02-85ER45204 Resource Type: Patent Resource Relation: Other Information: Portions of this document are illegible in microfiche products Country of Publication: United States Language: English Subject: 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES CESIUM 137 REMOVAL METALS INVENTIONS LIQUID WASTES MICA RADIOACTIVE EFFLUENTS RADIOACTIVE WASTE STORAGE TECHNOLOGY ASSESSMENT ALKALI METAL ISOTOPES BETA DECAY RADIOISOTOPES BETA-MINUS DECAY RADIOISOTOPES CESIUM ISOTOPES ELEMENTS ISOTOPES MANAGEMENT MATERIALS NUCLEI ODD-EVEN NUCLEI RADIOACTIVE MATERIALS RADIOACTIVE WASTES RADIOISOTOPES STORAGE WASTE MANAGEMENT WASTE STORAGE WASTES YEARS LIVING RADIOISOTOPES 052001* - Nuclear Fuels- Waste Processing 052002 - Nuclear Fuels- Waste Disposal & StorageĪ solvent composition and corresponding method for extracting cesium (Cs) from aqueous neutral and alkaline solutions containing Cs and perhaps other competing metal ions is described. Publication Date: Mon Apr 25 00:00: Research Org.: Pennsylvania State Univ., University Park, PA (United States) OSTI Identifier: 6383436 Patent Number(s): PATENTS-US-A7185222 Application Number: ON: DE89009590 Assignee: Dept.
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