原子能科学技术2016，Vol.50Issue(3)：471-476,6.DOI:10.7538/yzk.2016.50.03.0471
孔隙率对核级石墨氧化的影响
Effect of Porosity on Oxidation of Nuclear Grade Graphite
摘要
Abstract
Nuclear grade graphite is widely used as structure material ,moderating mate‐rial and reflector material in the high temperature gas‐cooled reactor .The oxidation per‐formance of nuclear grade graphite is important to the reactor material corrosion during water or air ingress accidents .The initial porosity distribution and porosity change dur‐ing the oxidation process have an influence on the oxidation performance .The nuclear grade graphite IG‐110 ,H‐451 ,NBG‐18 and A3‐3 were studied in this paper .Based on the one dimensional transient oxidation model ,the oxidation of spherical nuclear grade graphite with a diameter of 6 cm was researched .The effects of different initial porosity distributions on the graphite oxidation were analyzed as the initial porosity distribution was uniform ,normal and lognormal respectively .For conservative consideration and simplifying the oxidation model in the safety analysis of high temperature gas‐cooled reactor ,the initial porosity distribution of nuclear grade graphite should be selected as uniform ,which results a maximum overall weight loss ratio of graphite .关键词
核级石墨/初始孔隙率分布/整体失重率/氧化模型Key words
nuclear grade graphite/initial porosity distribution/overall weight loss ratio/oxidation model分类
能源科技引用本文复制引用
徐伟,石磊,郑艳华,刘鹏..孔隙率对核级石墨氧化的影响[J].原子能科学技术,2016,50(3):471-476,6.基金项目
国家科技重大专项资助项目 （）
