Ceramicrete{trademark} Stabilization of CST Resin: ITP Alternative Phase III Feasibility Study

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The Ceramicrete{trademark} waste form is a magnesium phosphate hydrate, which sets as the result of an acid-base reaction between KH{sub 2}PO{sub 4} and MgO in the presence of water. Based on the results of this feasibility study, this low temperature ceramic waste form is acceptable for stabilization of cesium loaded crystalline silicotitanate (CST) resin. The performance objective of CST stabilization is to convert a friable powdered resin into a monolithic form to improve handling and storage and to reduce the waste mobility. Advantages of this type of the CST-Ceramicrete{trademark} waste form include: room temperature processing of a fluid slurry, limited ... continued below

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Langton, C.A. December 7, 1998.

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Description

The Ceramicrete{trademark} waste form is a magnesium phosphate hydrate, which sets as the result of an acid-base reaction between KH{sub 2}PO{sub 4} and MgO in the presence of water. Based on the results of this feasibility study, this low temperature ceramic waste form is acceptable for stabilization of cesium loaded crystalline silicotitanate (CST) resin. The performance objective of CST stabilization is to convert a friable powdered resin into a monolithic form to improve handling and storage and to reduce the waste mobility. Advantages of this type of the CST-Ceramicrete{trademark} waste form include: room temperature processing of a fluid slurry, limited off gas, flexible mix designs, rapid setting, no free liquids, temperature tolerant and durable up to at least 90 degrees C. The Ceramicrete/220 waste form can be processed by in-container mixing or by batch mixing. Since a trace amount of free water will be associated with the wet resin in the CST-Ceramicrete{trademark} waste form, radiolysis of the free water may cause pressurization of the containers. Leaching tests were conducted to evaluate the CST-Ceramicrete{trademark} waste form performance relative to high-level waste glass. Results were very encouraging given that only one waste loading (50 wt. percent resin) was tested and that the leaching procedures were not fully optimized for a non-glass waste form. In general, the cesium leachability per the PCT test of the CST-Ceramicrete{trademark} waste was about 2X more than that of the ARM glass and about 200X more than the EA glass. For monolithic samples (MCC-1 test), the CST-Ceramicrete{trademark} waste form leached 4X to7X more cesium than the ARM glass. (The EA glass is not suited to monolithic leaching.) The CST-Ceramicrete{trademark} leaching results appear to be independent of curing temperature over the range 24 to 90 degrees C.

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Medium: P; Size: vp.

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INIS; OSTI as DE00005148

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  • Other Information: PBD: 7 Dec 1998

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  • Report No.: WSRC-TR-98-00338
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/5148 | External Link
  • Office of Scientific & Technical Information Report Number: 5148
  • Archival Resource Key: ark:/67531/metadc696557

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  • December 7, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • May 5, 2016, 3:41 p.m.

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Langton, C.A. Ceramicrete{trademark} Stabilization of CST Resin: ITP Alternative Phase III Feasibility Study, report, December 7, 1998; South Carolina. (digital.library.unt.edu/ark:/67531/metadc696557/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.