The influences of Pu and Zr on the melting temperatures of the UO2-PuO2-ZrO2 pseudo-ternary system

Specimens of (U, Pu, Zr)O 2 were prepared as simulated corium debris that were assumed like debris generated in the severe accident of the Fukushima Daiichi Nuclear Power Plant and their melting temperatures were measured by the thermal arrest technique in order to evaluate the influence of plutoniu...

Full description

Saved in:
Bibliographic Details
Published inJournal of nuclear science and technology Vol. 52; no. 10; pp. 1247 - 1252
Main Authors Morimoto, Kyoichi, Hirooka, Shun, Akashi, Masatoshi, Watanabe, Masashi, Sugata, Hiromasa
Format Journal Article
LanguageEnglish
Published Taylor & Francis 03.10.2015
Subjects
corium debris
melting temperature measurement
mixed oxide fuel
plutonium
severe accident
uranium
zirconium
Online AccessGet full text

Cover

More Information
Summary:Specimens of (U, Pu, Zr)O 2 were prepared as simulated corium debris that were assumed like debris generated in the severe accident of the Fukushima Daiichi Nuclear Power Plant and their melting temperatures were measured by the thermal arrest technique in order to evaluate the influence of plutonium and zirconium content on the melting temperature of the corium debris. From the evaluation, it was found that the influence of zirconium on the melting temperatures of both (U, Pu, Zr)O 2 and (U, Zr)O 2 was similar and that the melting temperature of (U, Pu, Zr)O 2 had a local maximum value in the Pu-content between 0 and 20 mol%. The UO 2 -PuO 2 -ZrO 2 pseudo-ternary phase diagram at 2900 and 3000 K was evaluated from the present experimental results and previously reported results.
ISSN:0022-3131
1881-1248
DOI:10.1080/00223131.2015.1047807