検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Thermal conductivity evaluation of high burnup mixed-oxide (MOX) fuel pellet

高燃焼度の混合酸化物(MOX)燃料ペレットの熱伝導率評価

天谷 政樹; 中村 仁一; 永瀬 文久; 更田 豊志

Amaya, Masaki; Nakamura, Jinichi; Nagase, Fumihisa; Fuketa, Toyoshi

高燃焼度の混合酸化物(MOX)燃料の挙動を評価するためには、燃料温度を正確に評価することが重要である。その燃料温度評価に必要なMOX燃料ペレットの熱伝導率評価式を提案した。Klemensの理論、未照射(U,Pu)O$$_{2}$$及び照射済UO$$_{2}$$ペレットの熱伝導率を利用し、燃焼度とPu濃度の影響を含むMOX燃料ペレットの熱伝導率評価式を導出した。高燃焼度MOX燃料の温度を上記評価式及び熱伝導率積分法で評価し、試験炉照射中の燃料温度測定値と比較した。両者はよく一致したことから、提案したMOXペレットの熱伝導率評価式は妥当と考えられる。

In order to estimate the behavior of high burnup mixed-oxide (MOX) fuel, it is important to evaluate fuel temperature accurately. The thermal conductivity formula of MOX fuel pellet which is needed to evaluate the fuel temperature was proposed. By using Klemens's theory and reported thermal conductivities of unirradiated (U, Pu)O$$_{2}$$ and irradiated UO$$_{2}$$ pellets, the thermal conductivity formula which contains the effects of burnup and plutonium (Pu) addition was obtained. Temperature of high burnup MOX fuel was evaluated based on the above-mentioned formula and the thermal conductivity integral method, and was compared with the fuel temperatures measured in a test reactor. Since both values agreed well, it is considered that the proposed thermal conductivity formula of MOX pellets is adequate.

Access

:

- Accesses

InCites™

:

パーセンタイル:39.29

分野:Materials Science, Multidisciplinary

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.