Analysis of Effect of Eccentric Holes in Pellets on Temperature and Heat Flux Distribution in Fuel Rod

概要

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A hollow pellet is proposed as fuel for high performance fuel rods. It is difficult, dur-ing pellet fabrication, to accurately center the hole in the pellet. A fabrication tolerance must be allowed for the center of the hole and that of the pellet. The present paper seeks to analytically obtain the temperature and heat flux distribu-tion in a fuel rod containing pellets with eccentric holes. The temperature distribution in power reactor fuel, based on practical assumption, can be obtained within reasonable limits by solving the steady-state heat conduction equation for the pellets with eccentric holes. The solution is simple, and appropriate to fuel design or safety evaluation.