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Irradiation sample fabrications for VHTR; Research and development for advanced high temperature gas-cooled reactor fuels and graphite components (Contract research)

超高温ガス炉のための照射サンプル製造; 革新的高温ガス炉燃料・黒鉛に関する技術開発(受託研究)

茂住 泰寛; 植田 祥平; 相原 純; 沢 和弘

Mozumi, Yasuhiro; Ueta, Shohei; Aihara, Jun; Sawa, Kazuhiro

超高温ガス炉(VHTR)の燃料は、現在の高温ガス炉より過酷な照射環境でかつより高温下で使用される。原子力機構は、現行燃料より優れ高温かつ高燃焼度に耐えうると期待される高性能で厚肉な炭化ケイ素(SiC)被覆燃料粒子や炭化ジルコニウム(ZrC)被覆粒子を開発している。試験炉で照射試験を実施するための、これら高性能な炭化ケイ素(SiC)被覆燃料や炭化ジルコニウム(ZrC)被覆粒子の製造に成功した。本報は、照射試料の製造データをまとめたものである。

Fuel for the Very High Temperature Reactor (VHTR) is required to be used under severer irradiation conditions and higher operational reactor temperatures than those of present high temperature gas cooled reactors. Japan Atomic Energy Agency has developed the advanced silicon carbide (SiC) -coated fuel particles having thicker layer thicknesses, and zirconium carbide (ZrC)-coated particles that are expected to preserve their integrity at higher temperatures and burnup conditions than current conventional coated fuel particles. These particles have been fabricated successfully in order to perform irradiation tests at experimental reactors. This paper is summarized fabrication data of irradiation samples.

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