Patent ID: 6137854
Filing Date: 2000-10-24
Classification: G21C,Y02E

Abstract:
A reactor control rod, comprising:a wing having a sheath which has a substantially U-shaped cross-section and an opening;a water feed hole formed in said sheath for introducing core water into said wing;a top end structure secured to a longitudinal top end of said sheath;a bottom end structure secured to a longitudinal bottom end of said sheath;a central structure to which said opening portion of said sheath is secured;a neutron absorber element made of a neutron absorbing material, said neutron absorber element being charged in said sheath;a supporting rod through hole formed in said neutron absorber element, so as to penetrate said neutron absorber element;a supporting rod fitting hole formed in said sheath; anda load supporting rod inserted into said supporting rod through hole, said load supporting rod having:a top end portion inserted into said supporting rod fitting hole, so as to support a weight of said neutron absorber element by said sheath via said load supporting rod,a main body portion having a diameter larger than that of said top end portion, anda step formed by a difference in diameters between said top end portion and said main body portion, so as to create a minute clearance between said sheath and said neutron absorber element,wherein a groove is formed on a surface of said main body portion of said load supporting rod substantially parallel to a longitudinal direction of said load supporting rod, so that a core water is passed between said load supporting rod and said neutron absorber element.