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

Title: MICROSTRUCTURAL CHANGES ASSOCIATED WITH IRRADIATION BURNUP OF URANIUM DIOXIDE

Abstract

Observations of microstructural changes associated with UO/sub 2/ burnup from 3.5 x 10/sup 20/ to 31.3 x 10/sup 20/ Fiss/cm/sup 3/ (1.5 to 13.4 at.% burnup) at 1940 deg F or less are described. There was subdivision of the grains in the higher end of the burnup range investigated; the subdivision started between 12.9 x 10/sup 20/ and 16.9 x 10/sup 20/ Fiss/cm/sup 3/ and was complete at 23.2 x 10/sup 20/ Fiss/cm/sup 3/. There was a disappearance of porosity in the lower end of the burnup range investigated and a reappearance of porosity at the higher end. There was a segregation of chemically reactive material, presumed to be fission products, in the grain boundaries at the lower burnups and in the sub-grains at the higher burnups. There was definitely segregation of at least one fission product, Cs/sup 137/, in this reactive boundary material. At 12.9 and 16.9 x 10/sup 20/ Fiss/cm/sup 3/, the Knoop hardness was significantly higher than the unirradiated fuel but at still a higher burnup there was a drop in hardness apparently related to the grain subdivision and segregation of fission products. (auth)

Authors:
;
Publication Date:
Research Org.:
Westinghouse Electric Corp. Bettis Atomic Power Lab., Pittsburgh
OSTI Identifier:
4714140
Report Number(s):
WAPD-T-1501
NSA Number:
NSA-17-027897
DOE Contract Number:  
AT(11-1)-GEN-14
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; BURNUP; CESIUM 137; DISTRIBUTION; FISSION PRODUCTS; GRAIN BOUNDARIES; HARDNESS; IRRADIATION; LATTICES; POROSITY; RADIATION DOSES; RADIATION EFFECTS; SEGREGATION; URANIUM DIOXIDE; VARIATIONS

Citation Formats

Padden, T R, and Schnizler, P S. MICROSTRUCTURAL CHANGES ASSOCIATED WITH IRRADIATION BURNUP OF URANIUM DIOXIDE. United States: N. p., 1962. Web.
Padden, T R, & Schnizler, P S. MICROSTRUCTURAL CHANGES ASSOCIATED WITH IRRADIATION BURNUP OF URANIUM DIOXIDE. United States.
Padden, T R, and Schnizler, P S. Wed . "MICROSTRUCTURAL CHANGES ASSOCIATED WITH IRRADIATION BURNUP OF URANIUM DIOXIDE". United States.
@article{osti_4714140,
title = {MICROSTRUCTURAL CHANGES ASSOCIATED WITH IRRADIATION BURNUP OF URANIUM DIOXIDE},
author = {Padden, T R and Schnizler, P S},
abstractNote = {Observations of microstructural changes associated with UO/sub 2/ burnup from 3.5 x 10/sup 20/ to 31.3 x 10/sup 20/ Fiss/cm/sup 3/ (1.5 to 13.4 at.% burnup) at 1940 deg F or less are described. There was subdivision of the grains in the higher end of the burnup range investigated; the subdivision started between 12.9 x 10/sup 20/ and 16.9 x 10/sup 20/ Fiss/cm/sup 3/ and was complete at 23.2 x 10/sup 20/ Fiss/cm/sup 3/. There was a disappearance of porosity in the lower end of the burnup range investigated and a reappearance of porosity at the higher end. There was a segregation of chemically reactive material, presumed to be fission products, in the grain boundaries at the lower burnups and in the sub-grains at the higher burnups. There was definitely segregation of at least one fission product, Cs/sup 137/, in this reactive boundary material. At 12.9 and 16.9 x 10/sup 20/ Fiss/cm/sup 3/, the Knoop hardness was significantly higher than the unirradiated fuel but at still a higher burnup there was a drop in hardness apparently related to the grain subdivision and segregation of fission products. (auth)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1962},
month = {8}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: