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Dry cleaning process test for fuel assembly of fast reactor plant system, 1; Pilot scale test for fuel pin bundle

高速炉の使用済燃料の乾式洗浄試験,1; ピンバンドル試験

工藤 秀行*; 大谷 雄一*; 原 正秀*; 加藤 篤志; 石川 信行; 大高 雅彦; 永井 桂一; 斉藤 淳一; 荒 邦章; 井手 章博*

Kudo, Hideyuki*; Otani, Yuichi*; Hara, Masahide*; Kato, Atsushi; Ishikawa, Nobuyuki; Otaka, Masahiko; Nagai, Keiichi; Saito, Junichi; Ara, Kuniaki; Ide, Akihiro*

次世代ナトリウム冷却炉では、プラント経済性向上の観点から、使用済燃料の洗浄プロセスとして革新的な乾式洗浄プロセスを採用している。本論文は、グローブボックス内において、燃料ピンバンドルを模擬した試験体を用いた、ナトリウムを試験体の共存性、残存ナトリウム量に係る基礎試験の結果を報告するものである。

A next generation SFR in Japan has adopted an advanced dry cleaning system which consists of the argon gas blowing process to reduce the amount of metallic residual sodium remaining on spent fuel assemblies. This paper describes experimental and analytical work focusing on the amount of residual sodium remaining on a fuel pin bundle before and after the argon gas blowing process. The experiments were conducted using a sodium test loop and a short specimen consisting of a 7 pin bundle. The effects of the blowing gas velocity and the blowing time were quantitatively analyzed in the experiments. On the basis of these experimental results, evaluation models predicting the amount of the residual sodium were constructed.

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