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Report No.

Advanced multi-scale modeling and experimental tests on fuel degradation in severe accident conditions, 1-5; Model of reaction between control rod and channel box

Pham, V. H.   ; Matsuura, Suguru*; Nakajima, Shotaro*; Nagae, Yuji ; Kurata, Masaki 

In this study, soaking experiments of pre-oxidized zry plates in molten mixture of stainless steel and 5 mol% boron carbide were conducted at 1200-1250$$^{circ}$$C. Thickness of oxide layer, ZrO$$_{2}$$ was measured before and after the soaking test to investigate the ZrO$$_{2}$$ thickness recession in the molten mixture. Results of the study indicated that the thickness recession of ZrO$$_{2}$$ was mainly caused by the diffusion of oxygen from oxide layer to metallic-Zr region.



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