Uranium-Aluminum Alloy Dissolution

Wymer, R.G.; Blanco, R.E.

doi:10.1021/ie50565a026

Cited by 17 publications

(24 citation statements)

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“…The mercury-catalyzed dissolution of aluminum metal creates a gas blanket near vertical metal surfaces that limits the mass transfer of fresh acid reactant to the surface thus limiting the dissolution rate. This phenomenon was observed by Wymer, 16 Schlea 15 and others. Caracciolo 21 also found this phenomenon limited the effective surface area of SRS tubular fuel to the outside surface of the fuel tubes during dissolution, and concluded that the outside surface area of the outer tube controlled the dissolution rate.…”

Section: Effect Of Surface Area-geometrysupporting

confidence: 58%

“…The mercury catalyzed dissolution of aluminum in nitric acid has been studied numerous times, particularly by researchers at SRS, 15 Oak Ridge National Laboratory (ORNL), 16 and Idaho National Laboratory (INL). 17,18 An oxide coating that forms on the aluminum requires the use of a mercury catalyst to achieve sufficiently rapid dissolution rates in nitric acid.…”

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

“…On the other hand, dissolution of aluminum under acid deficient conditions (<0.1 M HNO 3 ) results in significant amounts of hydrogen generation. 16,20 Aluminum metal dissolves at a significant rate in aluminum nitrate solutions in the presence of mercury catalyst and generates hydrogen at higher concentrations than when significant nitric acid is present. 16 For this reason the amount of acid charged to each dissolver batch is matched with the amount of metal to be dissolved so that excess acid remains unconsumed at the end of the dissolution cycle.…”

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

“…16,20 Aluminum metal dissolves at a significant rate in aluminum nitrate solutions in the presence of mercury catalyst and generates hydrogen at higher concentrations than when significant nitric acid is present. 16 For this reason the amount of acid charged to each dissolver batch is matched with the amount of metal to be dissolved so that excess acid remains unconsumed at the end of the dissolution cycle. By charging appropriate amounts of metal fuel and acid to the dissolver, a nitric acid solution of uranium and aluminum can be generated that is acceptable as a solvent extraction feedstock (of ~0.5 M HNO 3 and 1.5 M Al(NO 3 ) 3 ) with minimal adjustment.…”

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

“…extrusion process vs casting) and history of the aluminum (including radiation dose) affect the formation of the amalgam, and thus the dissolution rate. 15 Wymer 16 reported that the dissolution rate of uraniumaluminum alloy was not affected by increases in the mercuric ion concentration above 0.005 M Hg. H is work s howed the dissolution rate was linear with respect to mercury concentration below this concentration but this threshold is likely affected by the specific alloy(s) tested.…”

Section: Effect Of Catalyst Concentrationmentioning

confidence: 99%

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Dissolution of Irradiated Murr Fuel Assemblies

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Section: Effect Of Surface Area-geometrysupporting

confidence: 58%

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

Section: Dissolution Chemistry-aluminum Clad Uranium-aluminum Alloy Fmentioning

confidence: 99%

Section: Effect Of Catalyst Concentrationmentioning

confidence: 99%

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Dissolution of Irradiated Murr Fuel Assemblies

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U Uranium

Borgstedt¹,

Wedemeyer²

1989

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This work is subject to copyright. ALL rights are reserved, whether the whoLe or part of the materiaL is concerned, specifically those of translation, reprinting, reuse of illustrations, broadcasting, reproduction by photocopying machine or similar means, and storage in data banks. Under §54 of the German Copyright Law where copies are made for other than private use, a fee is payabLe to "VerwertungsgeseLLschafl Wort", Munich. © by Springer-VerLag Berlin HeideLberg 1989 Originally published by Springer-Verlag Berlin Heidelberg New York in 1989. Softcover reprint ofthe hardcover 8th edition 1989The use of registered names, trademarks, etc., in this publication does not impLy, even in the absence of a specific statement, that such names are exempt from the reLevant protective laws and regulations and therefore free for general use. PrefaceThe present voLume describes the alloys and the intermetaLLic compounds of uranium with the main group metaLs -those systems with semimetaLs such as boron and germanium are to be found in corresponding voLumes in uranium C series. In this voLume, main emphasis is given to the binary systems. Ternary systems are onLy deaLt with if there is formation of specific compounds or if there are other important characteristics or reactions. In generaL, the influence of small quantities of a third metaL on a system U-M, e.g., for mechanicaL properties or corrosion effects wiLL not be discussed in order not to extend this voLume excessiveLy.The ternary alloys are described immediateLy after the reLated binary systems. E. g., U-Ga-Ni is found after U-Ga, unLess a pLace after U-Ni couLd be imaginabLe from more systematic reasons (system of the Last position). The preferred order is aLso indicated in the sequence of eLement symboLs within the formuLas of compounds and systems: The compounds/systems reLated to U -AL are written as U -AL -M, etc.The behavior of uranium metaL towards the main group metaLs can be divided into two groups:Practically no soLubility in each other and no compound formation. This is the case for the aLkali and aLkaLine earth systems (except beryllium).OccasionaL formation of severaL compounds with Limited or extensive solid soLubility. This is observed for beryllium and the metaLs of third and fourth main group.The most frequently investigated systems are uranium -beryllium and uranium -aLuminium because of their speciaL scientific (U-Be) and technoLogicaL (U-AL) importance. UBe13, the onLy compound in the binary U -Be system, is one of the very few heavy-fermion compounds. Therefore, its physicaL properties especially were extensiveLy and thoroughLy studied in recent years. This GmeLin voLume gives a compLete and very detailed description of this compound, and at the time of publication, the most updated one.On the other hand, cermets and alloys in the U-AL system are very important as fueL, especially for the high-neutron-fLux nucLear research reactors. This fueL is mainLy based on 235U-enriched uranium on the aLuminium-rich side of the U -AL system, e. g., as UAL 4 ...

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With Metals of 3rd Main Group

Wedemeyer

1989

U Uranium

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Uranium-Aluminum Alloy Dissolution

Cited by 17 publications

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Dissolution of Irradiated Murr Fuel Assemblies

Dissolution of Irradiated Murr Fuel Assemblies

U Uranium

With Metals of 3rd Main Group

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