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Physical property model for advanced oxide fuels

先進酸化物燃料の物性モデル

加藤 正人; McClellan, K.*

Kato, Masato; McClellan, K.*

日米協力(CNWG)のもとで先進酸化物燃料に関する共同研究を進めている。共同研究では、サイエンスベース燃料解析コードのためのモデル開発を進めており、本研究は、酸化物燃料の物性モデルに関する報告をする。酸化物燃料の格子定数、熱膨張率、音速の実験データから比熱及び熱伝導率を評価し、実験データとよく一致することを確認した。

A joint study on advanced oxide fuels is being carried out under the Civil Nuclear Energy Working Group (CNWG) bilateral collaboration between the U.S. Department of Energy and the Japan Atomic Energy Agency. The main goal of this study is to support development and validation of a science-based fuel analysis code for minor actinide (MA) bearing MOX fuel. In analysis and evaluation of fuel performance, it is essential to understand the physical properties of the advanced oxide fuels. Therefore, we are investigating physical properties of (U,Pu)O$$_{2}$$, (U,Ce,)O$$_{2}$$, PuO$$_{2}$$, CeO$$_{2}$$ and other related compounds to prepare a physical property database and to construct an integrated mechanistic physical property model. In this paper, we describe the derivation of a model to represent heat capacity and thermal conductivity of (U,Pu)O$$_{2-x}$$ that is based on the experimental database.

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