Analysis on degradation behavior of uranium-containing zircon generated by severe accidents

Kitagaki, Toru ; Yoshida, Kenta*; Suzuki, Tatsuya*

In order to estimate the physical/chemical properties of the fuel debris remaining in 1F, it is important to estimate the environmental conditions in 1F, such as temperature or oxygen potential during Molten Core-Concrete Interaction (MCCI) in the molten pools. To this end, this study focuses on the degradation behavior of zircon minerals in different solution conditions were investigated. The SEM results indicate that needle-like crystals were formed on the zircon surface as a secondary product only when the mineral was soaked in aqueous NaOH. The relevant crystal structure was further confirmed with TEM.

Language	:	Japanese
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Meeting title	:	東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター; 2019年度大洗アルファ合同研究会
Held date	:	2019/10
Location (city)	:	仙台
Location (country)	:	日本
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Keywords	:	ジルコン; TEM; 溶解挙動; 福島第一原子力発電所事故; MCCI; Fukushima Daiichi Nuclear Power Station Accident
Research Facility	:	第4研究棟
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Cooperating Institute	:	長岡技術科学大学; 東北大学

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Registration No. : BB20191374
JAEA Abstracts No. :
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