• Title/Summary/Keyword: 폐 피복관

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Studies on the Electrochemical Dissolution for the Treatment of 10 g-Scale Zircaloy-4 Cladding Hull Wastes in LiCl-KCl Molten Salts (LiCl-KCl 용융염 내에서 10 g 규모의 Zircaloy-4 폐 피복관 처리를 위한 전기화학적 용해 연구)

  • Lee, You Lee;Lee, Chang Hwa;Jeon, Min Ku;Kang, Kweon Ho
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.10 no.4
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    • pp.273-280
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    • 2012

  • The electrochemical behaviors of 10 g-scale fresh and oxidized Zircaloy-4 cladding hulls were examined in $500^{\circ}C$ LiCl-KCl molten salts to confirm the feasibility of the electrorefining process for the treatment of hull wastes. In the results of measuring the potential-current response using a stainless steel basket filled with oxidized Zircaloy-4 hull specimens, the oxidation peak of Zr appears to be at -0.7 to -0.8 V vs. Ag/AgCl, which is similar to that of fresh Zircaloy-4 hulls, while the oxidation current is found to be much smaller than that of fresh Zircaloy-4 hulls. These results are congruent with the outcome of current-time curves at -0.78 V and of measuring the change in the average weight and thickness after the electrochemical dissolution process. Although the oxide layer on the surface affects the uniformity and rate of dissolution by decreasing the conductivity of Zircaloy-4 hulls, electrochemical dissolution is considered to occur owing to the defect of the surface and phase properties of the Zr oxide layer.

  • https://doi.org/10.7733/jkrws.2012.10.4.273 인용 PDF KSCI

Demonstration of Zr Recovery from 50 g Scale Zircaloy-4 Cladding Hulls using a Chlorination Method (50 g 규모의 Zircaloy-4 피복관으로부터 염소화 방법을 이용한 Zr 회수 거동 연구)

  • Jeon, Min Ku;Lee, Chang Hwa;Lee, You Lee;Choi, Yong Taek;Kang, Kweon Ho;Park, Geun Il
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.11 no.1
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    • pp.55-61
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    • 2013

  • The recovery of Zr from Zircaloy-4 (Zry-4) cladding hulls using a chlorination method was demonstrated for complete conversion of Zr into $ZrCl_4$. A chlorination reaction was performed by reacting Zry-4 hulls for 8 h under a 70 cc/min $Cl_2$ + 70 cc/min Ar flow at $380^{\circ}C$. The initial weight of the reactant (51.7 g) decreased to 0.49 g after 8 h of operation, which is only 0.95wt% of the initial weight. The weight of the total reaction products was 121.7 g with a high Zr purity of 99.80wt%. Fe and Sn were identified as major (0.18wt%) and minor (0.02wt%) impurities of the reaction products, respectively. It was also shown that Zr exhibited a high recovery ratio of 96.95wt% with a relatively small experimental loss of 2.34wt%. Observation of the reaction residues revealed that the chlorination reaction was dominant along the longitudinal direction, and surface oxide layers remained as reaction residues. The high purity and recovery ratio of Zr proposed the feasibility of the chlorination technique as an effective hull waste treatment method.

  • https://doi.org/10.7733/jkrws.2013.11.1.55 인용 PDF KSCI

폐 피복관 처리기술 개발-1

  • Gang, Gwon-Ho;Park, Geun-Il;Lee, Chang-Hwa;Jeon, Min-Gu;Yang, Jae-Hwan;Heo, Cheol-Min
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2011.10a
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    • pp.259-260
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    • 2011

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