Patent ID: 6041091
Filing Date: 2000-03-21
Classification: G21C,Y02E

Abstract:
A control rod for a nuclear reactor, comprising:a center structural member; anda plurality of wings each includinga sheath member of long plate structure having a U-shaped cross section having an opening which is secured to the center structural member,a front end structural member secured to a front end side of the wing viewed from a wing inserting direction in a reactor core,a terminal end structural member secured to a terminal end side of the wing viewed from the wing inserting direction in the reactor core,a plurality of neutron absorbing elements each having a plate structure accommodated in each of said sheaths in a row in a longitudinal direction thereof and each being formed of one or more neutron absorbing plates, anda plurality of load supporting members for supporting weights of the neutron absorbing elements,wherein respective lengths in the sheath longitudinal direction of the neutron absorbing elements closer to the front end structural member are smaller than respective lengths in the sheath longitudinal direction of the neutron absorber elements further from the front end structural member, and the neutron absorbing elements are supported to the U-shaped sheath by the load supporting members to thereby reduce a local load applied to the U-shaped sheath.