低融点合金を用いた原子炉内部調査用サンプリングアームの開発

―ロック部構造の改良と圧縮破壊実験―

抄録

This study aims to develop a robot for surveying the interior of a nuclear reactor and sampling fuel debris. To sample fuel debris that has melted in the lower part of the primary containment vessel, it is necessary to extend a rigid arm up to 3 m through a guide pipe with a diameter of 100 mm. To achieve these requirements, a sampling arm using a low melting point alloy as a locking mechanism at joints was proposed. In this paper, we describe an improvement of the mechanism of sampling arm using low melting point alloy and outline of compressive fracture experiment.