公开(公告)号：JPS61176885A

公开(公告)日：1986-08-08

申请号：JP1769086

申请日：1986-01-29

Applicant: FRAMATOME SA

Inventor： SAVARY F ,  LE SAULNIER G

IPC: G21C7/14

公开(公告)号：YU204385A

公开(公告)日：1988-10-31

申请号：YU204385

申请日：1985-12-27

Applicant: FRAMATOME SA

Inventor： SAVARY F

IPC: G21C7/27 ,  G21C7/12 ,  G21C7/14 ,  G21C19/10 ,  G21C19/105 ,  G21C19/19

Abstract: Device and method for retaining a linearly movable element in a nuclear reactor. The device comprises, for each shaft, a base fixed to the top part of the reactor internals and coaxial with a shaft guide tube; several grippers or catches spaced apart about the axis of the base and mounted for pivotal movement about a horizontal axis towards a position into and out of engagement with a portion, having circumferential grooves, of the shaft contained in the tube; a slide movable axially on the base towards a top position where it causes engagement of the catches in a groove of the rod, and out of such position; and springs bearing on the base and tending to engage the catches on the shaft. The slide is dimensioned so as to be held by the corresponding sleeve projecting through the reactor vessel cover in a position sufficiently distant from the low position for the catches to be released, whatever the temperature in the reactor.

公开(公告)号：YU9486A

公开(公告)日：1990-10-31

申请号：YU9486

申请日：1986-01-24

Applicant: FRAMATOME SA

Inventor： SAVARY F ,  PELETAN R ,  DESFONTAIINES G ,  COCHIN S

IPC: G21C7/14 ,  G21C7/12 ,  G21C7/16 ,  G21C7/27

Abstract: Mechanism for displacing and securing the rod of a nuclear reactor control bar, comprising an enclosure coaxial with the rod and forming a hydraulic cylinder in which the rod slides while defining a decompression chamber, a device for mechanically securing the rod in its high position, and a positive displacement reciprocating pump inserted between the decompression chamber and the inside of the tank, whose piston is actuated electromagnetically means and causes at each backward and forward movement lifting of given amplitude of the rod and the device for securing the rod in the high position disengagable also electromagnetically.