PURPOSE: To prevent the structural parts of a reactor core from receiving an untolerable load by supporting a cage which is used for housing the parts and has flexural rigidity and torsional rigidity below a cross beam so that the cage can rotate around the horizontal axis.
CONSTITUTION: The upper structure 18 of a reactor core is put in a rotating cage 3 having a flexural rigidity and torsional rigidity and fixed to the cage 3 with screws. Two rotating disks 24 and two short shafts 6 are provided face to face at two points near the common center of gravity of the structure 18 and cage 3. The assembly of the structure 18 and cage 3 is rotatably supported by the shafts 6. During the rotation of the assembly, a bias pressure is displayed by means of a digital elongation measuring instrument and a recorder connected to the instrument and the force of a rope is continuously displayed and monitored. Therefore, the stable state caught by the cage 3 having flexural rigidity and torsional rigidity is guaranteed.
GERUHARUTO RANTOROTSUKU
YURUGEN TAUTSU
