DEVICE FOR SUPPORTING NEUTRON FLUX MEASUREMENT AND GUIDE TUBE

PROBLEM TO BE SOLVED: To provide a device for supporting a neutron flux measurement and a guide tube that can decrease manufacturing costs without degrading the strength and stiffness of the device. SOLUTION: This device 21 is used to support neutron flux measurement and guide tubes 7 located vertically between the bottom face and a core support place in a reactor pressure vessel. The device includes bar-shaped beam parts 25 and bending corrugated parts 27 with concave parts 26 that receive the neutron flux measurement and guide tubes 7. The device 21 is formed so as to cross over cantilever beams 23 extending horizontally and the neutron flux measurement and guide tubes 7 fitted into the concave parts 26 of the cantilever beams 23. The device is equipped with clamps 29 that are thinner than the cantilever beams 23. Both ends of the clamps 29 are fixed on the cantilever beams 23, and the clamps 29 fix the neutron flux measurement and guide tubes 7 into the concave parts 26 by pressing them.