公开(公告)号：US3625816A

公开(公告)日：1971-12-07

申请号：US3625816D

申请日：1969-06-26

Applicant: SIEMENS AG

Inventor： ALEITE WERNER ,  BORTOLAZZI KURT

IPC: G21C7/14 ,  G21C7/18 ,  G21C7/20 ,  G21C7/08

CPC classification number: G21C7/14 ,  G21C7/18 ,  G21C7/20 ,  G21Y2002/201 ,  G21Y2002/50 ,  G21Y2004/30 ,  Y02E30/39

Abstract: Control rod assembly for nuclear reactors includes a plurality of finger control rods carried in common by a spiderlike holder, mechanical drive mechanism for displacing the holder vertically to insert the finger control rods into a plurality of fuel elements, the finger control rods containing neutron-absorbing substance along at least part of the length thereof, means for mounting a plurality of neutron-absorbing shutoff rods outside the reactor core, the mounting means being releasable during abnormal operation of the reactor for inserting the shutoff rods into the fuel elements and entrainment means operatively connected to and displaceable with the finger control rod holder and entrainable by the entrainment means in released condition of the mounting means.