Advanced concepts in TRISO fuel
先進的な被覆粒子燃料
湊 和生 ; 小川 徹
Minato, Kazuo; Ogawa, Toru
高温ガス炉燃料として、微小燃料核を熱分解炭素及び炭化ケイ素で四重に被覆したTRISO被覆粒子燃料が開発されてきた。ここでは、TRISO被覆粒子燃料の高温での性能向上、核分裂生成物による被覆層腐食の抑制及び核分裂生成物の保持能力の向上、並びに高速中性子体系で使用できる燃料など、種々の先進的な被覆粒子燃料について、燃料概念,製造,検査方法,照射挙動等の結果を体系的にとりまとめた。2012年に刊行されたComprehensive Nuclear Materialsに掲載された同名論文の内容に、その後の研究開発の進展を加筆したものである。
TRISO coated particle fuel has been developed for the high temperature gas-cooled reactors, which consists of microspherical fuel kernel and coating layers of pyrolytic carbon and silicon carbide. To improve the high temperature stability, the resistance to the chemical attack by fission products and the retention of fission products of the TRISO coated particle fuels, several types of advanced fuels were proposed and tested. Coated particle fuels for fast reactors were also proposed and tested. In this paper, fuel designs, fabrications, characterization techniques and fuel performance of these advanced coated particle fuels are systematically described. This is the updated version of the paper having the same title in Comprehensive Nuclear Materials published in 2012.