Alpha Radiolysis of Sorbed Water on Uranium Oxides and Uranium Oxyfluorides

Icenhour, A.S.

doi:10.2172/885590

Cited by 3 publications

(10 citation statements)

References 14 publications

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“…The G-values are fit to measurements of hydrogen generation rates obtained for fuel grade plutonium oxide (Duffey and Livingston [2]) and for uranium oxide spiked with curium-244, a short half-life alpha emitter (Icenhour and Toth [3]). The calculated G-values are adjusted for the moisture content of the mixed oxide.…”

Section: Analysis Overviewmentioning

confidence: 99%

“…The gas space volume is calculated by subtracting the volumes occupied by the oxide, the bottle plastic, the lead liner, and any other plastic bagging from the interior volume of the PCV. The PCV volume is 5128 cm 3 , minus 45 cm 3 for an aluminum honeycomb spacer, for an empty volume of 5083 cm 3 . The plastic container volume is calculated by dividing the mass of an empty 1-L bottle, measured to be 95 g, by the density of polyethylene, 1.35 g/cm 3 , to get 70 cm 3 .…”

Section: Analysis Overviewmentioning

confidence: 99%

“…The PCV volume is 5128 cm 3 , minus 45 cm 3 for an aluminum honeycomb spacer, for an empty volume of 5083 cm 3 . The plastic container volume is calculated by dividing the mass of an empty 1-L bottle, measured to be 95 g, by the density of polyethylene, 1.35 g/cm 3 , to get 70 cm 3 . It is assumed that there are 100 g of plastic bagging material, which, at a nylon density of 1.084 g/cm 3 , occupies 92 cm 3 .…”

Section: Analysis Overviewmentioning

confidence: 99%

“…The plastic container volume is calculated by dividing the mass of an empty 1-L bottle, measured to be 95 g, by the density of polyethylene, 1.35 g/cm 3 , to get 70 cm 3 . It is assumed that there are 100 g of plastic bagging material, which, at a nylon density of 1.084 g/cm 3 , occupies 92 cm 3 . The volume occupied by the lead bottle liner is not known and is neglected in calculating the total gas volume.…”

Section: Analysis Overviewmentioning

confidence: 99%

“…The volume of the mixed actinide oxide is based on the particle density, calculated as 90% of the theoretical or pycnometric density of the mixed oxide [6]. The theoretical density of the mixed oxide is calculated from the densities of plutonium oxide, 11.46 g/cm 3 , and of uranium oxide, 8.30 g/cm 3 [7], and the density of water, 1.0 g/cm 3 , for the adsorbed moisture.…”

Section: Analysis Overviewmentioning

confidence: 99%

See 4 more Smart Citations

Flammability Analysis for Actinide Oxides Packaged in 9975 Shipping Containers

Laurinat

Askew

Hensel

2013

Volume 7: Operations, Applications and Components

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Packaging options are evaluated for compliance with safety requirements for shipment of mixed actinide oxides packaged in a 9975 Primary Containment Vessel (PCV). Radiolytic gas generation rates, PCV internal gas pressures, and shipping windows (times to reach unacceptable gas compositions or pressures after closure of the PCV) are calculated for shipment of a 9975 PCV containing a plastic bottle filled with plutonium and uranium oxides with a selected isotopic composition. G-values for radiolytic hydrogen generation from adsorbed moisture are estimated from the results of gas generation tests for plutonium oxide and uranium oxide doped with curium-244. The radiolytic generation of hydrogen from the plastic bottle is calculated using a geometric model for alpha particle deposition in the bottle wall. The temperature of the PCV during shipment is estimated from the results of finite element heat transfer analyses.

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Section: Analysis Overviewmentioning

confidence: 99%

Section: Analysis Overviewmentioning

confidence: 99%

Section: Analysis Overviewmentioning

confidence: 99%

Section: Analysis Overviewmentioning

confidence: 99%

Section: Analysis Overviewmentioning

confidence: 99%

See 3 more Smart Citations

Flammability Analysis for Actinide Oxides Packaged in 9975 Shipping Containers

Laurinat

Askew

Hensel

2013

Volume 7: Operations, Applications and Components

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Evidence of a Nonphotochemical Mechanism for the Solid-State Formation of Uranyl Peroxide

et al. 2018

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We have demonstrated the solid-state formation of a uranyl peroxide (UP) species from hydrated uranyl fluoride via a uranyl hydroxide intermediate, the first observation of a UP species formed in a solid-state reaction. Water vapor pressure is shown to be a driving factor of both the loss of fluorine and the subsequent formation of peroxo units. We have ruled out a photochemical mechanism for formation of the UP species by demonstrating that the same reaction occurs in the dark. A radiolytic mechanism is unlikely because of the low radioactivity of the sample material, suggesting the existence of a novel UP formation mechanism.

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Water Sorption and Radiolysis Studies for Neptunium Oxides

Icenhour¹

2004

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Alpha Radiolysis of Sorbed Water on Uranium Oxides and Uranium Oxyfluorides

Cited by 3 publications

References 14 publications

Flammability Analysis for Actinide Oxides Packaged in 9975 Shipping Containers

Flammability Analysis for Actinide Oxides Packaged in 9975 Shipping Containers

Evidence of a Nonphotochemical Mechanism for the Solid-State Formation of Uranyl Peroxide

Water Sorption and Radiolysis Studies for Neptunium Oxides

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