Fuel Assembly The impact test apparatus according to the present invention, the upper space the fuel assembly from the surface and fixed position, it is configured such that the fuel assemblies free fall to release fixing the fuel assembly when the impact test of the fuel assembly mechanically.
More specifically, the present invention, the ball is fixedly connected to the upper part of the fuel assembly; And a fixed location spaced above the ball from the ground and, by stripping the ball upon impact test of the fuel assembly clamping portion that is configured that the fuel assembly to be free-falling; includes, spaced from the clamp portion to the upper side from the ground the vertical bar to the top plate fixed; Wherein disposed in the lower end of the vertical bar, the ball head of the cylinder with a receiving groove which accommodates insertion upward; It is disposed in a horizontal hole formed radially to the side wall of the receiving groove, the holding member having a larger diameter than the horizontal hole length; And movable up and down to surround the cylinder, along the inner peripheral surface of the outer cylinder formed with a release groove; includes, and the inner wall of the outer cylinder pressure to secure the head of the ball pushing the securing member toward the center, wherein outer cylinder is detached from the said ball head above the cylinder, as to the release groove is moved upward above the holding member is radially moved while pulling the release groove which is located at the lower side of the upper moving the holding member free fall It is configured to.