Dissolution of UO2 at various parametric conditions:: A comparison between calculated and experimental results

Kaija Ollila

doi:10.1557/PROC-127-337

Dissolution of UO₂ at various parametric conditions: A comparison between calculated and experimental results

Kaija Ollila

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

The solubilities of uranium measured in deionized water, in sodium bicarbonate solutions as a function of carbonate concentration and in two types of synthetic groundwaters have been compared with those predicted using the reaction pathway program, PHREEQE. All the measurements were carried out under both air-saturated, oxidizing and anoxic, reducing conditions.

The experimental solubility values of uranium under oxidizing conditions are, in general, lower when compared to the corresponding theoretical ones calculated by PHREEQE. A critical factor is the choice of solubility constant for the solid phase. The reason for the lower solubility values may also be the mechanism of dissolution leading for example either to a situation where low dissolution rate is a limiting factor, or to formation of some solid phase of uranium with lower solubility. The experimental solubility values under reducing conditions appear to be in good agreement with the theoretical solubility values.

Original language	English
Title of host publication	Scientific Basis for Nuclear Waste Management XII
Editors	Werner Lutze, Rodney C. Ewing
Place of Publication	Pittsburgh
Publisher	Materials Research Society
Pages	337-342
ISBN (Print)	978-0-931837-97-5
DOIs	https://doi.org/10.1557/PROC-127-337
Publication status	Published - 1989
MoE publication type	A4 Article in a conference publication
Event	Scientific Basis for Nuclear Waste Management XII - Berlin, Germany Duration: 10 Oct 1988 → 13 Oct 1988

Publication series

Series	Materials Research Society Symposia Proceedings
Volume	127
ISSN	0272-9172

Conference

Conference	Scientific Basis for Nuclear Waste Management XII
Country/Territory	Germany
City	Berlin
Period	10/10/88 → 13/10/88

Access to Document

10.1557/PROC-127-337

Cite this

@inproceedings{b78e2fef55ea41e38efc0ad6e0d33c44,

title = "Dissolution of UO2 at various parametric conditions:: A comparison between calculated and experimental results",

abstract = "The solubilities of uranium measured in deionized water, in sodium bicarbonate solutions as a function of carbonate concentration and in two types of synthetic groundwaters have been compared with those predicted using the reaction pathway program, PHREEQE. All the measurements were carried out under both air-saturated, oxidizing and anoxic, reducing conditions.The experimental solubility values of uranium under oxidizing conditions are, in general, lower when compared to the corresponding theoretical ones calculated by PHREEQE. A critical factor is the choice of solubility constant for the solid phase. The reason for the lower solubility values may also be the mechanism of dissolution leading for example either to a situation where low dissolution rate is a limiting factor, or to formation of some solid phase of uranium with lower solubility. The experimental solubility values under reducing conditions appear to be in good agreement with the theoretical solubility values.",

author = "Kaija Ollila",

year = "1989",

doi = "10.1557/PROC-127-337",

language = "English",

isbn = "978-0-931837-97-5",

series = "Materials Research Society Symposia Proceedings",

publisher = "Materials Research Society",

pages = "337--342",

editor = "Werner Lutze and Ewing, {Rodney C.}",

booktitle = "Scientific Basis for Nuclear Waste Management XII",

address = "United States",

note = "Scientific Basis for Nuclear Waste Management XII ; Conference date: 10-10-1988 Through 13-10-1988",

}

Ollila, K 1989, Dissolution of UO₂ at various parametric conditions: A comparison between calculated and experimental results. in W Lutze & RC Ewing (eds), Scientific Basis for Nuclear Waste Management XII. Materials Research Society, Pittsburgh, Materials Research Society Symposia Proceedings, vol. 127, pp. 337-342, Scientific Basis for Nuclear Waste Management XII, Berlin, Berlin, Germany, 10/10/88. https://doi.org/10.1557/PROC-127-337

Dissolution of UO₂ at various parametric conditions: A comparison between calculated and experimental results. / Ollila, Kaija.
Scientific Basis for Nuclear Waste Management XII. ed. / Werner Lutze; Rodney C. Ewing. Pittsburgh: Materials Research Society, 1989. p. 337-342 (Materials Research Society Symposia Proceedings, Vol. 127).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Dissolution of UO2 at various parametric conditions:

T2 - Scientific Basis for Nuclear Waste Management XII

AU - Ollila, Kaija

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N2 - The solubilities of uranium measured in deionized water, in sodium bicarbonate solutions as a function of carbonate concentration and in two types of synthetic groundwaters have been compared with those predicted using the reaction pathway program, PHREEQE. All the measurements were carried out under both air-saturated, oxidizing and anoxic, reducing conditions.The experimental solubility values of uranium under oxidizing conditions are, in general, lower when compared to the corresponding theoretical ones calculated by PHREEQE. A critical factor is the choice of solubility constant for the solid phase. The reason for the lower solubility values may also be the mechanism of dissolution leading for example either to a situation where low dissolution rate is a limiting factor, or to formation of some solid phase of uranium with lower solubility. The experimental solubility values under reducing conditions appear to be in good agreement with the theoretical solubility values.

AB - The solubilities of uranium measured in deionized water, in sodium bicarbonate solutions as a function of carbonate concentration and in two types of synthetic groundwaters have been compared with those predicted using the reaction pathway program, PHREEQE. All the measurements were carried out under both air-saturated, oxidizing and anoxic, reducing conditions.The experimental solubility values of uranium under oxidizing conditions are, in general, lower when compared to the corresponding theoretical ones calculated by PHREEQE. A critical factor is the choice of solubility constant for the solid phase. The reason for the lower solubility values may also be the mechanism of dissolution leading for example either to a situation where low dissolution rate is a limiting factor, or to formation of some solid phase of uranium with lower solubility. The experimental solubility values under reducing conditions appear to be in good agreement with the theoretical solubility values.

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DO - 10.1557/PROC-127-337

M3 - Conference article in proceedings

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BT - Scientific Basis for Nuclear Waste Management XII

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