| 摘要 |
1,003,723. Reactor control rods. GENERAL DYNAMICS CORPORATION. Aug. 5, 1964 [Aug. 5, 1963], No. 31795/64. Drawings to Specification. Heading G6C. A nuclear reactor control rod is formed of a tube, having a fusible plug at its lower end and containing neutron absorbing pellets. If the reactor temperature increases beyond a predetermined limit and the tube is prevented from entering the reactor, by core distortion, the plug melts and the pellets fall into the control rod channel. The pellets are packed symmetrically within the control rod tube and when released by the fusible plug they fall in a random manner into the rod channel so as to occupy a larger volume than when packed within the tube, thus increasing the shut-down effect. The pellets may be boron carbide in graphite. |
