Application of Coating Technology on the （涂层技术的应用,在）.pdf

Application of Coating Technology on the Zirconium-Based Alloy to Decrease High-Temperature Oxidation Hyun-Gil Kim*, Il-Hyun Kim, Jeong-Yong Park, Yang-Hyun Koo LWR Fuel Technology Division, KAERI, 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea *Corresponding author: hgkim@kaeri.re.kr LWR Fuel Technology Division Accident-tolerant fuel claddings (ATFC)  The breakthrough to the challenge facing nuclear fuels of LWR after Fukushima Dai-ichi accident involves the development of accident-tolerant fuels. Fukushima accident  New requirements have been emerged on the performance of fuel to provide a more extended safety margin.  One of the research efforts to enhance the accident-tolerance of nuclear fuels relies on the improvement in the oxidation resistance of claddings with the reduction of hydrogen emission. Hydrogen explosion Zr + 2H O  ZrO + 2H 2 2 2 LWR Fuel Technology Division 2 Technical issues to development of ATFC Accident condition - High temperature oxidation (lower oxidation rate) - High temperature ballooning (higher creep/deformation resistance) Normal operation condition e - High burn-up Full ceramic materials u