炉心損傷時の炉心物質再配置挙動評価手法の開発,10; デブリ化距離予測評価手法の検討

Development of assessment method to evaluate the material relocation behavior in the core disruptive accident of FBR, 10; Predictive evaluation method of the distance for fragmentation of molten core material

松場 賢一  ; 磯崎 三喜男; 神山 健司  ; 飛田 吉春

Matsuba, Kenichi; Isozaki, Mikio; Kamiyama, Kenji; Tobita, Yoshiharu

ナトリウム冷却高速炉の炉心損傷時に原子炉容器下部プレナムへ流出した溶融炉心物質がデブリ化するまでの距離(デブリ化距離)の予測評価手法を開発するため、溶融炉心模擬物質を冷却材中へ放出させる試験(融体デブリ化試験)の結果に対する考察を行い、デブリ化距離と流出条件の関係を実験相関式として整理した。

In order to develop an evaluation method of the distance for fragmentation of molten core material discharged into the lower sodium plenum during core disruptive accidents in sodium-cooled fast reactors, a series of experiments on fragmentation behavior of simulated molten materials was carried out. A semi-empirical correlation of the distance for fragmentation was developed from the experimental results.