CAJ | 학술논문

高温气冷堆（HTGR）是能适应未来能源市场的第四代先进核反应堆堆型之一，其固有安全性的第一道保障是使用的T RISO型包覆燃料颗粒。在T RISO型燃料颗粒4层包覆结构中，SiC包覆层是承受包覆燃料颗粒内压和阻挡裂变产物释放的关键层，制备高质量S iC包覆层是核燃料领域中的重大问题和关键技术之一。本文介绍高温气冷堆燃料颗粒的基本结构，详述制备S iC包覆层的流化床‐化学气相沉积过程，提出S iC层细晶化这一研究方向，并系统阐述包覆燃料颗粒S iC包覆层细晶化的优势。在细晶化S iC材料制备方法方面，系统分析S iC粉体、陶瓷、薄膜和厚膜材料的研究现状，并结合本实验室前期研究成果提出制备细晶S iC包覆层的可行制备策略。
고온기랭퇴（HTGR）시능괄응미래능원시장적제사대선진핵반응퇴퇴형지일，기고유안전성적제일도보장시사용적T RISO형포복연료과립。재T RISO형연료과립4층포복결구중，SiC포복층시승수포복연료과립내압화조당렬변산물석방적관건층，제비고질량S iC포복층시핵연료영역중적중대문제화관건기술지일。본문개소고온기랭퇴연료과립적기본결구，상술제비S iC포복층적류화상‐화학기상침적과정，제출S iC층세정화저일연구방향，병계통천술포복연료과립S iC포복층세정화적우세。재세정화S iC재료제비방법방면，계통분석S iC분체、도자、박막화후막재료적연구현상，병결합본실험실전기연구성과제출제비세정S iC포복층적가행제비책략。
High temperature gas‐cooled reactor (HTGR) with inherent safety character‐istics is considered as one of the attractive and competitive generation Ⅳ nuclear reactors in the future energy markets .Tristructural‐isotropic (TRISO)‐coated particle fuel is the most significant safety aspect in this nuclear reactor ,since it relies on the properties of the four coating layers surrounding the kernel fuel to hinder the release of harmful radio‐active material .Among these layers ,the silicon carbide (SiC) coating is considered the most important as it not only provides the TRISO particle with structural integrity but also retains fission products at elevated temperatures .The preparation of high quality SiC layers is one of significant issues and key technologies in nuclear fuel fabrication . T he basic structure of the T RISO‐coated fuel particles and the fluidized bed chemical vapor deposition (FBCVD) method to prepare SiC layers were introduced .The advanta‐ges of decreasing grain size of SiC layers were analyzed and the idea to prepare SiC layers with fine grain size was proposed .In the preparation strategies ,recent research devel‐opments of fine grain SiC materials in the forms of powders ,ceramics ,thin films and coatings were reviewed .Based on the progresses achieved by our group ,basic synthesis routes for the preparation fine grain SiC coatings were proposed .