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Title: Radiation Stability of Spark‐Plasma‐Sintered Lead Vanadate Iodoapatite

Abstract

Spark‐plasma‐sintered lead vanadate iodoapatite Pb 9.85 (VO 4 ) 6 I 1.7 , a promising nuclear waste form for the immobilization of I‐129, was irradiated with energetic ions, electrons, and gamma rays, to investigate its radiation stability. In situ TEM observation of the 1 MeV Kr 2+ irradiation shows that lead vanadate iodoapatite generally exhibits higher tolerance against ion irradiation‐induced amorphization than lead vanadate fluorapatite, and the spark plasma sintering can further enhance its radiation stability attributed to the enhanced crystallinity, reduced defect concentration, and denser microstructure. The critical amorphization dose and critical temperature for the SPS‐densified iodoapatite at 700°C are determined to be 0.25 dpa at room temperature and 230°C, respectively. No significant phase transformation or microstructural damage occurred under energetic electron and gamma irradiations. Raman spectra of gamma‐ray‐irradiated iodoapatite indicate improved V–O bond order at 500 kGy dose. Generally, the spark‐plasma‐sintered iodoapatite exhibits excellent radiation stability for nuclear waste form applications. The significantly enhanced radiation stability of the SPS‐densified iodoapatite suggests that SPS holds great promise for fabricating iodoapatite waste form with minimum iodine loss and optimized radiation tolerance for effective management of highly volatile I‐129.

Authors:
 [1]; ORCiD logo [2];  [2];  [1];  [3];  [2];
  1. Department of Mechanical and Industrial Engineering Louisiana State University Baton Rouge Louisiana 70803
  2. Department of Mechanical, Aerospace, and Nuclear Engineering Rensselaer Polytechnic Institute Troy New York 12180
  3. Department of Geological &, Environmental Sciences Stanford University Stanford California 94305‐2115
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1401152
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Name: Journal of the American Ceramic Society Journal Volume: 98 Journal Issue: 10; Journal ID: ISSN 0002-7820
Publisher:
Wiley-Blackwell
Country of Publication:
United States
Language:
English

Citation Formats

Lu, Fengyuan, Yao, Tiankai, Danon, Yaron, Zhou, Jianren, Ewing, Rodney C., Lian, Jie, and Lee, ed., W. E. Radiation Stability of Spark‐Plasma‐Sintered Lead Vanadate Iodoapatite. United States: N. p., 2015. Web. doi:10.1111/jace.13738.
Lu, Fengyuan, Yao, Tiankai, Danon, Yaron, Zhou, Jianren, Ewing, Rodney C., Lian, Jie, & Lee, ed., W. E. Radiation Stability of Spark‐Plasma‐Sintered Lead Vanadate Iodoapatite. United States. https://doi.org/10.1111/jace.13738
Lu, Fengyuan, Yao, Tiankai, Danon, Yaron, Zhou, Jianren, Ewing, Rodney C., Lian, Jie, and Lee, ed., W. E. Tue . "Radiation Stability of Spark‐Plasma‐Sintered Lead Vanadate Iodoapatite". United States. https://doi.org/10.1111/jace.13738.
@article{osti_1401152,
title = {Radiation Stability of Spark‐Plasma‐Sintered Lead Vanadate Iodoapatite},
author = {Lu, Fengyuan and Yao, Tiankai and Danon, Yaron and Zhou, Jianren and Ewing, Rodney C. and Lian, Jie and Lee, ed., W. E.},
abstractNote = {Spark‐plasma‐sintered lead vanadate iodoapatite Pb 9.85 (VO 4 ) 6 I 1.7 , a promising nuclear waste form for the immobilization of I‐129, was irradiated with energetic ions, electrons, and gamma rays, to investigate its radiation stability. In situ TEM observation of the 1 MeV Kr 2+ irradiation shows that lead vanadate iodoapatite generally exhibits higher tolerance against ion irradiation‐induced amorphization than lead vanadate fluorapatite, and the spark plasma sintering can further enhance its radiation stability attributed to the enhanced crystallinity, reduced defect concentration, and denser microstructure. The critical amorphization dose and critical temperature for the SPS‐densified iodoapatite at 700°C are determined to be 0.25 dpa at room temperature and 230°C, respectively. No significant phase transformation or microstructural damage occurred under energetic electron and gamma irradiations. Raman spectra of gamma‐ray‐irradiated iodoapatite indicate improved V–O bond order at 500 kGy dose. Generally, the spark‐plasma‐sintered iodoapatite exhibits excellent radiation stability for nuclear waste form applications. The significantly enhanced radiation stability of the SPS‐densified iodoapatite suggests that SPS holds great promise for fabricating iodoapatite waste form with minimum iodine loss and optimized radiation tolerance for effective management of highly volatile I‐129.},
doi = {10.1111/jace.13738},
journal = {Journal of the American Ceramic Society},
number = 10,
volume = 98,
place = {United States},
year = {Tue Jul 14 00:00:00 EDT 2015},
month = {Tue Jul 14 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1111/jace.13738

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Cited by: 13 works
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