Effects of magnesium ion on dissolution of nuclear waste glass

Iwata, Hajime ; Sekine, Nobuyuki*; Mitsui, Seiichiro

Static leaching tests of simulated nuclear waste glass were carried out at 90 $^{circ}$ C in an air atmosphere using a MgCl $_{2}$ solution and deionized water. As a result, in the MgCl $_{2}$ solution, temporal plateau and following resumption of glass dissolution were observed, while an ordinary dissolution behavior, which shows rate decrease with time, was observed in the deionized water. It is considered that these unique dissolution behavior in MgCl $_{2}$ solution may be related to the evolution of the Mg-containing mineral species deposited on the glass surface.

Language	:	Japanese
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Meeting title	:	日本原子力学会2017年秋の大会
Held date	:	2017/09
Location (city)	:	札幌
Location (country)	:	日本
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Keywords	:	ガラス固化体; ガラスの溶解・変質; 保護的効果; Mgケイ酸塩; ハイドロタルサイト
Research Facility	:	ENTRY(地層処分基盤研究施設)
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Article of JAEA R&D Review	:
Cooperating Institute	:	資源エネルギー庁

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Registration No. : BB20170544
JAEA Abstracts No. :
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