Oxidative Sintering of UO2 Pellets Using CO2 Atmosphere

Tri Yulianto; Etty Mutiara; Odi Buana Hutapea; Sugeng Rianto; Triarjo

doi:10.1063/5.0192916

Oxidative Sintering of UO₂ Pellets Using CO₂ Atmosphere

Tri Yulianto^*
, Etty Mutiara
, Odi Buana Hutapea
, Sugeng Rianto
, Triarjo

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

The sintering of UO2 pellets has been conducted at temperatures 1000⁰C and 1100⁰C in a CO2 atmosphere (oxidative sintering). The used of CO2 as reducing atmosphere is intended to provide an atmosphere which can accelerate sintering process compared to conventional reductive sintering of UO2 green pellets conducted at 1700^oC in N2-H2 atmosphere. UO2 pellets were fabricated through cold compaction of UO2 powder feedstock with a variety of its O/U ratio. The green pellets then sintered at 1000^oC and 1100^oC for 2hours in CO2 atmosphere (oxidative sintering) and at 1700^oC for 3hours in N2-H2 atmosphere (reductive sintering). The characterization of green and sintered pellets in the term of geometric density by measuring the diameter, height and weight of the pellet. The results show that the densification in CO2 atmosphere (oxidative sintering) of hyper-stoichiometric UO2 pellet nearly completed at 600°C lower than that in reductive sintering with the shorter sintering time. In the oxidative sintering, a higher O/U ratio of UO2 powder feedstock will increase the densification. This trend is not observed in reductive sintering of UO2 pellets due to the reduction of UO2+x (decreasing in O/U ratio) occurs before densification stage.

Original language	English
Title of host publication	AIP Conference Proceedings
Editors	Djarot Sulistio Wisnubroto, Anhar Riza Antariksawan, Mukh Syaifudin, Muhayatun Santoso, Emy Mulyani, Muhammad Yusuf
Publisher	American Institute of Physics Inc.
Edition	1
ISBN (Electronic)	9780735448292
DOIs	https://doi.org/10.1063/5.0192916
Publication status	Published - 15 Feb 2024
Externally published	Yes
Event	2022 International Conference on Nuclear Science, Technology, and Applications, ICONSTA 2022 in conjunction with the 1st Annual Meeting of HIMNI - Tangerang Selatan, Indonesia Duration: 23 Nov 2022 → 24 Nov 2022

Publication series

Name	AIP Conference Proceedings
Number	1
Volume	2967
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	2022 International Conference on Nuclear Science, Technology, and Applications, ICONSTA 2022 in conjunction with the 1st Annual Meeting of HIMNI
Country/Territory	Indonesia
City	Tangerang Selatan
Period	23/11/22 → 24/11/22

Access to Document

10.1063/5.0192916

Cite this

Yulianto, T., Mutiara, E., Hutapea, O. B., Rianto, S., & Triarjo (2024). Oxidative Sintering of UO₂ Pellets Using CO₂ Atmosphere. In D. S. Wisnubroto, A. R. Antariksawan, M. Syaifudin, M. Santoso, E. Mulyani, & M. Yusuf (Eds.), AIP Conference Proceedings (1 ed.). Article 110015 (AIP Conference Proceedings; Vol. 2967, No. 1). American Institute of Physics Inc.. https://doi.org/10.1063/5.0192916

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abstract = "The sintering of UO2 pellets has been conducted at temperatures 10000C and 11000C in a CO2 atmosphere (oxidative sintering). The used of CO2 as reducing atmosphere is intended to provide an atmosphere which can accelerate sintering process compared to conventional reductive sintering of UO2 green pellets conducted at 1700oC in N2-H2 atmosphere. UO2 pellets were fabricated through cold compaction of UO2 powder feedstock with a variety of its O/U ratio. The green pellets then sintered at 1000oC and 1100oC for 2hours in CO2 atmosphere (oxidative sintering) and at 1700oC for 3hours in N2-H2 atmosphere (reductive sintering). The characterization of green and sintered pellets in the term of geometric density by measuring the diameter, height and weight of the pellet. The results show that the densification in CO2 atmosphere (oxidative sintering) of hyper-stoichiometric UO2 pellet nearly completed at 600°C lower than that in reductive sintering with the shorter sintering time. In the oxidative sintering, a higher O/U ratio of UO2 powder feedstock will increase the densification. This trend is not observed in reductive sintering of UO2 pellets due to the reduction of UO2+x (decreasing in O/U ratio) occurs before densification stage.",

author = "Tri Yulianto and Etty Mutiara and Hutapea, \{Odi Buana\} and Sugeng Rianto and Triarjo",

note = "Publisher Copyright: {\textcopyright} 2024 American Institute of Physics Inc.. All rights reserved.; 2022 International Conference on Nuclear Science, Technology, and Applications, ICONSTA 2022 in conjunction with the 1st Annual Meeting of HIMNI ; Conference date: 23-11-2022 Through 24-11-2022",

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Yulianto, T, Mutiara, E, Hutapea, OB, Rianto, S & Triarjo 2024, Oxidative Sintering of UO₂ Pellets Using CO₂ Atmosphere. in DS Wisnubroto, AR Antariksawan, M Syaifudin, M Santoso, E Mulyani & M Yusuf (eds), AIP Conference Proceedings. 1 edn, 110015, AIP Conference Proceedings, no. 1, vol. 2967, American Institute of Physics Inc., 2022 International Conference on Nuclear Science, Technology, and Applications, ICONSTA 2022 in conjunction with the 1st Annual Meeting of HIMNI, Tangerang Selatan, Indonesia, 23/11/22. https://doi.org/10.1063/5.0192916

Oxidative Sintering of UO₂ Pellets Using CO₂ Atmosphere. / Yulianto, Tri; Mutiara, Etty; Hutapea, Odi Buana et al.
AIP Conference Proceedings. ed. / Djarot Sulistio Wisnubroto; Anhar Riza Antariksawan; Mukh Syaifudin; Muhayatun Santoso; Emy Mulyani; Muhammad Yusuf. 1. ed. American Institute of Physics Inc., 2024. 110015 (AIP Conference Proceedings; Vol. 2967, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Oxidative Sintering of UO2 Pellets Using CO2 Atmosphere

AU - Yulianto, Tri

AU - Mutiara, Etty

AU - Hutapea, Odi Buana

AU - Rianto, Sugeng

AU - Triarjo,

PY - 2024/2/15

Y1 - 2024/2/15

N2 - The sintering of UO2 pellets has been conducted at temperatures 10000C and 11000C in a CO2 atmosphere (oxidative sintering). The used of CO2 as reducing atmosphere is intended to provide an atmosphere which can accelerate sintering process compared to conventional reductive sintering of UO2 green pellets conducted at 1700oC in N2-H2 atmosphere. UO2 pellets were fabricated through cold compaction of UO2 powder feedstock with a variety of its O/U ratio. The green pellets then sintered at 1000oC and 1100oC for 2hours in CO2 atmosphere (oxidative sintering) and at 1700oC for 3hours in N2-H2 atmosphere (reductive sintering). The characterization of green and sintered pellets in the term of geometric density by measuring the diameter, height and weight of the pellet. The results show that the densification in CO2 atmosphere (oxidative sintering) of hyper-stoichiometric UO2 pellet nearly completed at 600°C lower than that in reductive sintering with the shorter sintering time. In the oxidative sintering, a higher O/U ratio of UO2 powder feedstock will increase the densification. This trend is not observed in reductive sintering of UO2 pellets due to the reduction of UO2+x (decreasing in O/U ratio) occurs before densification stage.

AB - The sintering of UO2 pellets has been conducted at temperatures 10000C and 11000C in a CO2 atmosphere (oxidative sintering). The used of CO2 as reducing atmosphere is intended to provide an atmosphere which can accelerate sintering process compared to conventional reductive sintering of UO2 green pellets conducted at 1700oC in N2-H2 atmosphere. UO2 pellets were fabricated through cold compaction of UO2 powder feedstock with a variety of its O/U ratio. The green pellets then sintered at 1000oC and 1100oC for 2hours in CO2 atmosphere (oxidative sintering) and at 1700oC for 3hours in N2-H2 atmosphere (reductive sintering). The characterization of green and sintered pellets in the term of geometric density by measuring the diameter, height and weight of the pellet. The results show that the densification in CO2 atmosphere (oxidative sintering) of hyper-stoichiometric UO2 pellet nearly completed at 600°C lower than that in reductive sintering with the shorter sintering time. In the oxidative sintering, a higher O/U ratio of UO2 powder feedstock will increase the densification. This trend is not observed in reductive sintering of UO2 pellets due to the reduction of UO2+x (decreasing in O/U ratio) occurs before densification stage.

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U2 - 10.1063/5.0192916

DO - 10.1063/5.0192916

M3 - Conference contribution

AN - SCOPUS:85185597365

T3 - AIP Conference Proceedings

BT - AIP Conference Proceedings

A2 - Wisnubroto, Djarot Sulistio

A2 - Antariksawan, Anhar Riza

A2 - Syaifudin, Mukh

A2 - Santoso, Muhayatun

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A2 - Yusuf, Muhammad

PB - American Institute of Physics Inc.

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