You need JavaScript to view this

Study on thermodynamic properties of actinoid oxides

Abstract

Since long-life transuranium elements (TRU) accumulate associated with a progress of high-burnup of fuel, TRU quenching in a reactor or an accelerator has been examined in Japan. To design a fuel for TRU quenching, thermal expansion is an important thermal parameter along with thermal capacity and heat transfer coefficient. Here, lattice constants of PuO{sub 2} ThO{sub 2}, UO{sub 2} and NpO{sub 2} were investigated by high temperature X-ray diffraction, showing that the lattice constants of these dioxides but UO{sub 2} obtained in this study were well coincident with Tailor`s values. The linear expansion coefficients for ThO{sub 2}, UO{sub 2} and PuO{sub 2} agreed with TPRC data and that of NpO{sub 2} with Fahey`s measurement. The linear expansion coefficient of NpO{sub 2} was found to be temperature dependent as well as other three dioxides. Those values were in inverse proportion to their melting points in a higher temperature range, whereas in a lower temperature one, the coefficient of UO{sub 2} was larger than those of NpO{sub 2} and PuO{sub 2}. Therefore, such abnormal behavior of the coefficient in a low temperature range was considered to be related to the lower Debye temperature of UO{sub 2} compared with the other dioxides. (M.N.)
Authors:
Publication Date:
Jan 01, 1996
Product Type:
Technical Report
Report Number:
UTRCN-G-24
Reference Number:
SCA: 360204; 050700; PA: JPN-97:006283; EDB-97:112170; SN: 97001823174
Resource Relation:
Other Information: PBD: Jan 1996; Related Information: Is Part Of Report on progress of researches by common utilization of JAERI nuclear facilities, for fiscal 1994; PB: 373 p.
Subject:
36 MATERIALS SCIENCE; 05 NUCLEAR FUELS; THORIUM OXIDES; LATTICE PARAMETERS; THERMAL EXPANSION; URANIUM DIOXIDE; PLUTONIUM DIOXIDE; NEPTUNIUM OXIDES; TEMPERATURE DEPENDENCE; RADIATION EFFECTS; FUEL CYCLE
OSTI ID:
515464
Research Organizations:
Tokyo Univ. (Japan). Research Center for Nuclear Science and Technology
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97736276; TRN: JP9706283
Availability:
OSTI as DE97736276
Submitting Site:
JPN
Size:
pp. 274-276
Announcement Date:
Sep 12, 1997

Citation Formats

Tsuji, Toshihide, Miyajima, Nobuyoshi, Kato, Tetsuya, Ochida, Manabu, Mumomura, Tadasumi, Yamashita, Toshiyuki, Nitani, Noriko, and Ouchi, Kinji. Study on thermodynamic properties of actinoid oxides. Japan: N. p., 1996. Web.
Tsuji, Toshihide, Miyajima, Nobuyoshi, Kato, Tetsuya, Ochida, Manabu, Mumomura, Tadasumi, Yamashita, Toshiyuki, Nitani, Noriko, & Ouchi, Kinji. Study on thermodynamic properties of actinoid oxides. Japan.
Tsuji, Toshihide, Miyajima, Nobuyoshi, Kato, Tetsuya, Ochida, Manabu, Mumomura, Tadasumi, Yamashita, Toshiyuki, Nitani, Noriko, and Ouchi, Kinji. 1996. "Study on thermodynamic properties of actinoid oxides." Japan.
@misc{etde_515464,
title = {Study on thermodynamic properties of actinoid oxides}
author = {Tsuji, Toshihide, Miyajima, Nobuyoshi, Kato, Tetsuya, Ochida, Manabu, Mumomura, Tadasumi, Yamashita, Toshiyuki, Nitani, Noriko, and Ouchi, Kinji}
abstractNote = {Since long-life transuranium elements (TRU) accumulate associated with a progress of high-burnup of fuel, TRU quenching in a reactor or an accelerator has been examined in Japan. To design a fuel for TRU quenching, thermal expansion is an important thermal parameter along with thermal capacity and heat transfer coefficient. Here, lattice constants of PuO{sub 2} ThO{sub 2}, UO{sub 2} and NpO{sub 2} were investigated by high temperature X-ray diffraction, showing that the lattice constants of these dioxides but UO{sub 2} obtained in this study were well coincident with Tailor`s values. The linear expansion coefficients for ThO{sub 2}, UO{sub 2} and PuO{sub 2} agreed with TPRC data and that of NpO{sub 2} with Fahey`s measurement. The linear expansion coefficient of NpO{sub 2} was found to be temperature dependent as well as other three dioxides. Those values were in inverse proportion to their melting points in a higher temperature range, whereas in a lower temperature one, the coefficient of UO{sub 2} was larger than those of NpO{sub 2} and PuO{sub 2}. Therefore, such abnormal behavior of the coefficient in a low temperature range was considered to be related to the lower Debye temperature of UO{sub 2} compared with the other dioxides. (M.N.)}
place = {Japan}
year = {1996}
month = {Jan}
}