ニッケル系金属放射性廃棄物のアークプラズマ溶融処理時におけるコバルト残存率

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2016/07/01

タイトル(英語): Residual Cobalt Ratio during Arc Plasma Melting Treatment of Low Level Radioactive Wastes Containing Nickel

著者名: 古川　静枝（（一財）電力中央研究所），池田　弘一（（一財）電力中央研究所），神足　将司（（一財）電力中央研究所），天川　正士（（一財）電力中央研究所）

著者名(英語): Shizue Furukawa (Central Research Institute of Electric Power Industry), Kouichi Ikeda (Central Research Institute of Electric Power Industry), Masashi Kotari (Central Research Institute of Electric Power Industry), Tadashi Amakawa (Central Research Institute of Electric Power Industry)

キーワード: アークプラズマ，溶融処理，コバルト残存率，放射性廃棄物，ニッケル　　arc plasma，melting treatment，residual cobalt ratio，radioactive wastes，nickel

要約(英語): The plasma melting treatment of low level radioactive waste is currently in practical use. This treatment is applied to typical radioactive wastes such as carbon steel and concrete to produce a solidified product. The scaling factor method is used to evaluate the concentrations of radio-nuclides in the product. Because cobalt (Co) plays a particularly important role, it is important to clarify the behavior of Co during the treatment. In this report, we investigated the residual Co ratio in the slag produced during the plasma melting treatment of a nickel alloy. We found that a residual Co ratio of less than 10% was achieved in the slag when a Ni concentration of less than 80 wt% and a Fe concentration of more than 20 wt% was kept in the molten metal. The effect of the reduction of Co oxides by Fe on the residual Co ratio was the most dominant among the Co oxidation/reduction reactions occurring in the molten melt.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.136 No.7 （2016）

本誌掲載ページ: 414-420 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/136/7/136_414/_article/-char/ja/