[1I13-17] characteristics of fuel cladding

[1I16] The development of self-healing coating on zirconium alloy

*Zhengang Duan¹, Huilong Yang², Sho Kano², Kenta Murakami², Hiroaki Abe² (1. Tohoku University, 2. The University of Tokyo)

Keywords:self-healing, coaing, cladding

The well-known inherent demerits of Zr-based alloys such as rapid oxidation and hydrogen production at high-temperature steam, especially in the case of the lost-of-coolant accident (LOCA), cannot be altered by optimizing the Zr-alloy chemical composition and/or their manufactory processes alone, which was highlighted further by the Fukushima accident.The coating technology is much more economic than substitutes for Zr-base alloys without the necessity to modify the base materials, contributing to the possibility for commercial application in the very near term. In addition, the self-healing coating, which can repair the damages automatically, or by an external trigger, is much more attractive. A new conception of self-healing coating has been proposed, and is under development.