X-ray diffraction, differential scanning calorimetry and evolved gas analysis of aged plutonium tetrafluoride (PuF4)

被引：3

作者：

Wayne, David M. ^{[1
]}

Stritzinger, Jared T. ^{[2
]}

Casella, Amanda J. ^{[3
]}

Sweet, Lucas E. ^{[3
]}

Corbey, Jordan F. ^{[3
]}

Garcia, Daniel J. ^{[2
,6
]}

Wylie, E. Miller ^{[4
]}

Tandon, Lav ^{[5
]}

Olson, Angela C. ^{[4
]}

Rim, Jung Ho ^{[4
]}

机构：

[1] Alamos Natl Lab, Mat Sci & Technol, Nucl Mat Sci, MST16,MS E574, Los Alamos, NM 87545 USA

[2] Alamos Natl Lab, Actinide Mat Proc & Power, AMPP3, MS E511, Los Alamos, NM 87545 USA

[3] Pacific Northwest Natl Lab, Nucl & Radiochem Team, POB 999, Richland, WA 99352 USA

[4] Alamos Natl Lab, Actinide Analyt Chem, CAAC, MS E554, Los Alamos, NM 87545 USA

[5] Alamos Natl Lab, Met Prod, PT1, MS E551, Los Alamos, NM 87545 USA

[6] Alamos Natl Lab, Training & Miss Serv, ORI1, MS E523, Los Alamos, NM 87545 USA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2021年 / 329卷 / 02期

关键词：

Plutonium tetrafluoride; Differential scanning calorimetry; Thermal analysis; Evolved gas analysis; Annealing; Radiation damage; RADIATION-DAMAGE; THERMODYNAMIC PROPERTIES; ACCUMULATION; FLUORINATION; DIFFUSION; DIOXIDE; SALTS; OXIDE;

D O I：

10.1007/s10967-021-07810-z

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A 30 year-old PuF4 sample consisting of brown powder (PuF4-b) and pink granules (PuF4-p) was analyzed. X-ray diffraction shows the bulk is comprised of three compounds: PuF4, -PuO2, and -PuF4 center dot 1.6H(2)O. Broadening of PuF4 XRD peaks suggests possible a-damage. After annealing at 650 degrees C, crystalline PuF4 and PuO2 remain. Thermogravimetric analysis and differential scanning calorimetry-with simultaneous evolved gas analysis- of the separated PuF4-p and PuF4-b components reveal a distinct sequence of reactions. Dehydration occurs between similar to 90 and 300 degrees C. Exothermic annealing of the a-damage occurs in two stages: at 350-355 degrees C and at 555-558 degrees C. Hydrofluoric acid, fluorine and helium desorb during the first exotherm. Above 700 degrees C, PuF4 reacts with -PuO2, resulting in oxygen release and mass loss.

引用

页码：741 / 756

页数：16

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