Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Cr Electroplating Technology to prevent Interdiffusion between Metallic Fuel and Clad Material

금속연료-피복재 상호확산 방지를 위한 크롬 도금법 적용 연구

  • Kim, Jun Hwan (Advanced Fuel Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Lee, Kang Soo (Advanced Fuel Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Yang, Seong Woo (Advanced Fuel Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Lee, Byoung Oon (Advanced Fuel Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Lee, Chan Bock (Advanced Fuel Technology Development Division, Korea Atomic Energy Research Institute)
  • 김준환 (한국원자력연구원 차세대핵연료기술개발부) ;
  • 이강수 (한국원자력연구원 차세대핵연료기술개발부) ;
  • 양성우 (한국원자력연구원 차세대핵연료기술개발부) ;
  • 이병운 (한국원자력연구원 차세대핵연료기술개발부) ;
  • 이찬복 (한국원자력연구원 차세대핵연료기술개발부)
  • Received : 2011.07.13
  • Published : 2011.12.25
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Abstract

Studies have been carried out in order to reduce fuel-cladding chemical interaction (FCCI) behavior of metallic fuel in sodium-cooled fast reactors (SFR) using an electroplating technique. A $20{\mu}m$ thick Cr layer has been plated by the electrochemical method in the Sargent bath over the HT9 (12Cr-1Mo) clad material and diffusion couple tests of the U-10Zr metallic fuel as well as the rare earth alloy (70Ce-29La) have been conducted. The results show that the Cr plating can prevent FCCI behavior along the fuel-clad interface. However, cracks developed through the thickness during plating, which resulted in the migration of some fuel constituents. Variation of bath temperature, application of pulse current, and post heat treatment have been conducted to control such cracks. We found out that some conditions like the pulse current and the post heat treatment enhanced the layer property by reducing the internal cracks and improving the diffusion couple test.

Keywords

Acknowledgement

Grant : 핵연료핵심기반기술 개발

Supported by : 교육과학기술부

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