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Title: Alpha decay self-damage in cubic and monoclinic zirconolite

Samples of primarily-monoclinic /sup 238/Pu-doped zirconolite were stored at ambient temperature to allow accumulation of alpha decay self-damage to a dose of 1 x 10/sup 24/ ..cap alpha../m/sup 3/ (equivalent to a SYNROC age of approx. 10/sup 3/y). Bulk swelling reached 2.3 vol% with no tendency toward saturation, a damage response similar to that observed for cubic Pu-doped zirconolite. X-ray volumetric swelling at 4 x 10/sup 24/ ..cap alpha../m/sup 3/ was 1 vol%, considerably less than that for the cubic material. Changes in cell dimensions differed significantly from those reported by others for a monoclinic natural mineral. Extensive microcracking was observed, and is attributed at least partially to swelling differences between the matrix and minor phases.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
5913566
Report Number(s):
LA-UR-81-2954; CONF-811122-7
ON: DE82002400; TRN: 82-000203
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the Materials Research Society, Boston, MA, USA, 16 Nov 1981
Research Org:
Los Alamos National Lab., NM (USA)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; ZIRCONOLITE; CRYSTAL DOPING; CUBIC LATTICES; LATTICE PARAMETERS; MONOCLINIC LATTICES; PHYSICAL RADIATION EFFECTS; ALPHA DECAY; AMBIENT TEMPERATURE; CRACKS; EXPERIMENTAL DATA; PLUTONIUM 238; RADIOACTIVE WASTE PROCESSING; SWELLING; SYNROC PROCESS; X-RAY DIFFRACTION; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALKALINE EARTH METAL COMPOUNDS; ALPHA DECAY RADIOISOTOPES; CALCIUM COMPOUNDS; CALCIUM OXIDES; CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DATA; DECAY; DIFFRACTION; EVEN-EVEN NUCLEI; HEAVY NUCLEI; IMPLANTS; INFORMATION; ISOTOPES; MANAGEMENT; MINERALS; NUCLEI; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM ISOTOPES; PROCESSING; RADIATION EFFECTS; RADIOISOTOPES; SCATTERING; TITANIUM COMPOUNDS; TITANIUM OXIDES; TRANSITION ELEMENT COMPOUNDS; WASTE MANAGEMENT; WASTE PROCESSING; YEARS LIVING RADIOISOTOPES; ZIRCONIUM COMPOUNDS; ZIRCONIUM OXIDES 052001* -- Nuclear Fuels-- Waste Processing; 360605 -- Materials-- Radiation Effects