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高温ガス炉の安全性向上のための革新的燃料要素に関する研究,1; 全体概要

Research on advanced fuel element for upgrading safety of high temperature gas-cooled reactors, 1; Outlines

橘 幸男 ; 大平 幸一*; 黒田 雅利*

Tachibana, Yukio; Ohira, Koichi*; Kuroda, Masatoshi*

高温ガス炉の安全性の更なる向上を目的として、高温ガス炉特有の事故である減圧事故(配管破断事故)に伴う空気侵入事故時に、想定をはるかに超える空気が炉心に侵入した場合においても、形状及び健全性を維持できる、SiCを含む母材とすることで耐酸化性能を付与した革新的な燃料要素の研究開発を、原子燃料工業及び熊本大学と共同で、平成26年から28年にかけて行った。ここではその全体概要を述べる。

For the purpose of upgrading safety of High Temperature Gas-cooled Reactor (HTGR), research on advanced fuel element was conducted with cooperation of Nuclear Fuel Industries and Kumamoto University. The advanced fuel element contains SiC as the matrix material and oxidation resistance is highly improved so that shape and integrity of the fuel element should be maintained even when large unexpected amount of air enters into the core in the air ingress (pipe rupture) accident which is a typical event for the HTGR. This presentation shows outlines of the contracted research from FY2014 to 2016.

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