skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: PREPARATION OF HIGH-DENSITY THORIUM OXIDE SPHERES

Abstract

A method of preparing high-density thorium oxide spheres for use in pellet beds in nuclear reactors is presented. Sinterable thorium oxide is first converted to free-flowing granules by means such as compression into a compact and comminution of the compact. The granules are then compressed into cubes having a density of 5.0 to 5.3 grams per cubic centimeter. The cubes are tumbled to form spheres by attrition, and the spheres are then fired at 1250 to 1350 deg C. The fired spheres are then polished and fired at a temperature above 1650 deg C to obtain high density. Spherical pellets produced by this method are highly resistant to mechanical attrition hy water. (AEC)

Inventors:
;
Issue Date:
OSTI Identifier:
4126877
Patent Number(s):
3116106
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
NSA Number:
NSA-18-004235
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-64
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; CLEANING; COMPACTING; CORROSION; DENSITY; EROSION; HEATING; PARTICLES; PELLETS; PREPARATION; SPHERES; THORIUM OXIDES; WATER

Citation Formats

McNees, Jr, R A, and Taylor, A J. PREPARATION OF HIGH-DENSITY THORIUM OXIDE SPHERES. United States: N. p., 1963. Web.
McNees, Jr, R A, & Taylor, A J. PREPARATION OF HIGH-DENSITY THORIUM OXIDE SPHERES. United States.
McNees, Jr, R A, and Taylor, A J. Tue . "PREPARATION OF HIGH-DENSITY THORIUM OXIDE SPHERES". United States.
@article{osti_4126877,
title = {PREPARATION OF HIGH-DENSITY THORIUM OXIDE SPHERES},
author = {McNees, Jr, R A and Taylor, A J},
abstractNote = {A method of preparing high-density thorium oxide spheres for use in pellet beds in nuclear reactors is presented. Sinterable thorium oxide is first converted to free-flowing granules by means such as compression into a compact and comminution of the compact. The granules are then compressed into cubes having a density of 5.0 to 5.3 grams per cubic centimeter. The cubes are tumbled to form spheres by attrition, and the spheres are then fired at 1250 to 1350 deg C. The fired spheres are then polished and fired at a temperature above 1650 deg C to obtain high density. Spherical pellets produced by this method are highly resistant to mechanical attrition hy water. (AEC)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1963},
month = {12}
}