Device for uncoupling a control rod from an absorbing element for a nuclear reactor
AssigneeCommissariat a l'Energie Atomique
InventorYves Bergamaschi
Life of this patent
Estimating the term…
Abstract
The control rod (4) carrying absorbing elements (5) contains an operating rod (37) forced upwards by washers (38) and projecting by a push button end (52). When it is decided to uncouple the absorbing elements, the control rod (4) is raised, so that the teeth (62) of ratchets (56) opened out beforehand weigh on the push button (52), lower the operating rod (37) and enable coupling balls (33) to enter a groove (35) on the bottom of the rod, which detaches the pommel (18) carrying the absorbing elements (5). Application to pressurized water nuclear reactors.
Claims5
Mechanism for the uncoupling of a control rod (4) from an absorbing element (5, 18) for a nuclear reactor, incorporating an uncoupling operating rod (37) sliding in the control rod and having an upper end (52) projecting beyond the control rod, and a locking system (30, 32, 33) cooperating with the operating rod, the control rod and the absorbing element, characterized in that the operating rod is forced upwards by a spring (38) compressed between the operating rod and the control rod, a retractable stop (56) being provided above said upper end to bear on said upper end when the control rod (4) is raised, and in that the operating rod and locking system are designed so as to bring about uncoupling by forcing the operating rod downwards into the control rod.
Dependencies are inferred from the claim text.