X‐ray diffraction, differential scanning calorimetry and evolved gas analysis of aged plutonium tetrafluoride ($ PuF_{4} $)
Abstract A 30 year-old $ PuF_{4} $ sample consisting of brown powder ($ PuF_{4} $-b) and pink granules ($ PuF_{4} $-p) was analyzed. X-ray diffraction shows the bulk is comprised of three compounds: $ PuF_{4} $, $ PuO_{2} $, and $ PuF_{4} $·1.$ 6H_{2} $O. Broadening of $ PuF_{4} $ XRD peaks suggests possible %$\alpha%$-damage. After annealing at 650 °C, crystalline $ PuF_{4} $ and $ PuO_{2} $ remain. Thermogravimetric analysis and differential scanning calorimetry—with simultaneous evolved gas analysis—of the separated $ PuF_{4} $-p and $ PuF_{4} $-b components reveal a distinct sequence of reactions. Dehydration occurs between ~ 90 and 300 °C. Exothermic annealing of the %$\alpha%$-damage occurs in two stages: at 350–355 °C and at 555–558 °C. Hydrofluoric acid, fluorine and helium desorb during the first exotherm. Above 700 °C, $ PuF_{4} $ reacts with $ PuO_{2} $, resulting in oxygen release and mass loss..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:329 |
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| Enthalten in: |
Journal of radioanalytical and nuclear chemistry - 329(2021), 2 vom: 23. Juni, Seite 741-756 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wayne, David M. [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| BKL: | |
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| Themen: |
Annealing |
| Anmerkungen: |
© This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2021 |
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| doi: |
10.1007/s10967-021-07810-z |
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| funding: |
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| Förderinstitution / Projekttitel: |
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SPR044694636 |
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| 520 | |a Abstract A 30 year-old $ PuF_{4} $ sample consisting of brown powder ($ PuF_{4} $-b) and pink granules ($ PuF_{4} $-p) was analyzed. X-ray diffraction shows the bulk is comprised of three compounds: $ PuF_{4} $, $ PuO_{2} $, and $ PuF_{4} $·1.$ 6H_{2} $O. Broadening of $ PuF_{4} $ XRD peaks suggests possible %$\alpha%$-damage. After annealing at 650 °C, crystalline $ PuF_{4} $ and $ PuO_{2} $ remain. Thermogravimetric analysis and differential scanning calorimetry—with simultaneous evolved gas analysis—of the separated $ PuF_{4} $-p and $ PuF_{4} $-b components reveal a distinct sequence of reactions. Dehydration occurs between ~ 90 and 300 °C. Exothermic annealing of the %$\alpha%$-damage occurs in two stages: at 350–355 °C and at 555–558 °C. Hydrofluoric acid, fluorine and helium desorb during the first exotherm. Above 700 °C, $ PuF_{4} $ reacts with $ PuO_{2} $, resulting in oxygen release and mass loss. | ||
| 650 | 4 | |a Plutonium tetrafluoride |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Differential scanning calorimetry |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Thermal analysis |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Evolved gas analysis |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Annealing |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Radiation damage |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Stritzinger, Jared T. |e verfasserin |4 aut | |
| 700 | 1 | |a Casella, Amanda J. |e verfasserin |4 aut | |
| 700 | 1 | |a Sweet, Lucas E. |e verfasserin |4 aut | |
| 700 | 1 | |a Corbey, Jordan F. |e verfasserin |4 aut | |
| 700 | 1 | |a Garcia, Daniel J. |e verfasserin |4 aut | |
| 700 | 1 | |a Wylie, E. Miller |e verfasserin |4 aut | |
| 700 | 1 | |a Tandon, Lav |e verfasserin |4 aut | |
| 700 | 1 | |a Olson, Angela C. |e verfasserin |4 aut | |
| 700 | 1 | |a Rim, Jung Ho |e verfasserin |4 aut | |
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