CAJ | 학술논문

高温气冷堆的燃料元件由包覆燃料颗粒弥散在石墨基体中组成。在反应堆运行过程中，辐照及各复杂的物理化学反应产生的应力会使包覆燃料颗粒发生破损，对包覆燃料颗粒进行应力分析是评价燃料元件和反应堆运行安全性能的主要内容之一。本文基于压力壳模式，主要考虑内压作用下的球形壳层应力及包覆燃料颗粒的非球形因素，用有限元法对应力进行了分析。
고온기랭퇴적연료원건유포복연료과립미산재석묵기체중조성。재반응퇴운행과정중，복조급각복잡적물이화학반응산생적응력회사포복연료과립발생파손，대포복연료과립진행응력분석시평개연료원건화반응퇴운행안전성능적주요내용지일。본문기우압력각모식，주요고필내압작용하적구형각층응력급포복연료과립적비구형인소，용유한원법대응력진행료분석。
The fuel element of high temperature gas-cooled reactor is composed of coated particle fuel w hich is dispersed in graphite matrix .In normal operation ,the stress due to irradiation and a variety of complex physical and chemical reactions will cause failure of the coated particle fuel . Therefore , the stress analysis of coated particle fuel is important for the safety of fuel element and reactor .The stress was analyzed by the finite element method based on the inner pressure failure mechanism considering asphericity of the particles .