Title: Vitrified chemically bonded phosphate ceramics for immobilization of radioisotopes

Abstract

A method of immobilizing a radioisotope and vitrified chemically bonded phosphate ceramic (CBPC) articles formed by the method are described. The method comprises combining a radioisotope-containing material, MgO, a source of phosphate, and optionally, a reducing agent, in water at a temperature of less than 100.degree. C. to form a slurry; curing the slurry to form a solid intermediate CBPC article comprising the radioisotope therefrom; comminuting the intermediate CBPC article, mixing the comminuted material with glass frits, and heating the mixture at a temperature in the range of about 900 to about 1500.degree. C. to form a vitrified CBPC article comprising the radioisotope immobilized therein.

Inventors:

Wagh, Arun S.

Issue Date:

Tue Apr 05 00:00:00 EDT 2016

Research Org.:

Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1248483

Patent Number(s):

9305672

Application Number:

14/291,980

Assignee:

UCHICAGO ARGONNE, LLC (Chicago, IL)

Patent Classifications (CPCs):

C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS

C03C14/006 - {the non-glass component being in the form of microcrystallites, e.g. of optically or electrically active material}
C03C14/008 - {the non-glass component being in molecular form}
C03C2214/14 - Waste material, e.g. to be disposed of
C03C2214/20 - Glass-ceramics matrix
C03C4/0042 - {for glass comprising or including particular isotopes}

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/3201 - Alkali metal oxides or oxide-forming salts thereof
C04B2235/3206 - Magnesium oxides or oxide-forming salts thereof
C04B2235/3418 - Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
C04B2235/3454 - Calcium silicates, e.g. wollastonite
C04B2235/365 - Borosilicate glass
C04B2235/447 - Phosphates or phosphites
C04B35/447 - based on phosphates {, e.g. hydroxyapatite}
C04B35/62625 - {Wet mixtures}
C04B35/62685 - {characterised by the order of addition of constituents or additives}

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT

G21F9/162 - {in an inorganic matrix, e.g. clays, zeolites}
G21F9/305 - {Glass or glass like matrix

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DOE Contract Number:  

AC02-06CH11357

Resource Type:

Patent

Resource Relation:

Patent File Date: 2014 May 30

Country of Publication:

United States

Language:

English

Subject:

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE