Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...
Patent
1986-01-29
1987-09-29
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By movement of control element or by release of neutron...
376243, 376367, G21C 712
Patent
active
046967834
ABSTRACT:
The electromagnetic device is suitable for use in actuating a pressurized water reactor control bar. It comprises a shaft and a fluid-tight casing in which are movable longitudinally a first and a second sets of grippers for gripping the shaft, staggered in the longitudinal direction. The first set of grippers is associated with a movable pole co-operating with a holding coil, carried by the casing and movable by energization and de-energization of the coil between a position in which the first set of grippers holds the shaft and a position in which it releases it. The second set of grippers is associated with a movable plunger co-operating with a transfer coil and movable by energization and de-energization of the transfer coil to and from a position in abutment against an other pole. The other pole is movable between two positions spaced apart by a given step. The movable pole belongs to a mechanism for cutting off a path coolant fluid constituting a thermosiphon causing convection flow between the inside of the vessel and the space defined by the casing.
REFERENCES:
patent: 3775247 (1973-11-01), Ode
patent: 3959071 (1976-05-01), Bevilalqua
patent: 4423002 (1983-12-01), Wiart
patent: 4472348 (1984-09-01), Desfortaines
Lesaulnier Guy
Savary Fernand
Framatome
Walsh Donald P.
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