Equilibrium leach testing and on-line, nondestructive strength prediction methods as cemented radioactive waste form qualification procedures

Persistent Link:
http://hdl.handle.net/10150/278258
Title:
Equilibrium leach testing and on-line, nondestructive strength prediction methods as cemented radioactive waste form qualification procedures
Author:
Lewis, Robert James, 1968-
Issue Date:
1992
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The disposal of solidified radioactive wastes requires physical, chemical, and radiological characterization to ensure safety. Two quantities important to physical characterization include compressive strength and leach resistance. It is desirable to monitor strength development on-line in processing whenever possible. Therefore, the ability of nondestructive evaluation techniques to predict the long term compressive strength of waste forms during their processing was theoretically and experimentally evaluated. It was determined that the compressive strength of the mixture could be predicted through analysis of both rheological behavior and maturity development. Ultrasonic methods were shown to be less effective. Leach testing requires destructive analysis. The ability of neutron activation analysis to increase the detection limit of leached cobalt from cement waste forms containing EDTA was experimentally examined. A detection limit approaching 53 parts per billion was found. EDTA concentration had a measurable effect on the cobalt release due to cobalt chelation and matrix degradation.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Nuclear.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Wacks, Morton E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleEquilibrium leach testing and on-line, nondestructive strength prediction methods as cemented radioactive waste form qualification proceduresen_US
dc.creatorLewis, Robert James, 1968-en_US
dc.contributor.authorLewis, Robert James, 1968-en_US
dc.date.issued1992en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe disposal of solidified radioactive wastes requires physical, chemical, and radiological characterization to ensure safety. Two quantities important to physical characterization include compressive strength and leach resistance. It is desirable to monitor strength development on-line in processing whenever possible. Therefore, the ability of nondestructive evaluation techniques to predict the long term compressive strength of waste forms during their processing was theoretically and experimentally evaluated. It was determined that the compressive strength of the mixture could be predicted through analysis of both rheological behavior and maturity development. Ultrasonic methods were shown to be less effective. Leach testing requires destructive analysis. The ability of neutron activation analysis to increase the detection limit of leached cobalt from cement waste forms containing EDTA was experimentally examined. A detection limit approaching 53 parts per billion was found. EDTA concentration had a measurable effect on the cobalt release due to cobalt chelation and matrix degradation.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Nuclear.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorWacks, Morton E.en_US
dc.identifier.proquest1351347en_US
dc.identifier.bibrecord.b27149110en_US
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