Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...
Patent
1980-02-08
1982-07-27
Cangialosi, Sal
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By movement of control element or by release of neutron...
G21C 716
Patent
active
043417337
ABSTRACT:
A method of actuating absorber rods in pebble bed reactors, according to which the rod is moved into or out of the ball pile with limited advancing speed in a turning or rotary manner. A feeding or advancing force is transmitted onto the rod being introduced, and this force does not exceed the appropriate maximum value of the ball strength and the rod stability. The drive provided for the foregoing procedure effects both a longitudinal shifting and rotation of a rod connected therewith, and has an axially fixed advancing spindle, the spindle nut of which is rigidly connected with the absorber rod and is journalled in a rotary pipe or tube in such a way as to be axially displaceable yet fixed against rotation, with the rotary tube being driven at a constant speed. During removal or outward travel of the rod from the ball pile, a fixed transmission ratio exists between the driving mechanism and driven end, which fixed transmission is generated with the aid of a freewheel or free-running drive. A coupling is provided between the drive motor and the spindle to limit the transferrable torque or turning moments according to a predetermined characterizing line or curve, whereby the rotary speed of the spindle is limited during introduction of the rod into the ball pile by the freewheel or free-running drive causing engagement when the driven end speed of the coupling equals the driving speed. The coupling between the drive motor and the spindle may be found by a hydraulic coupling of oil pump and oil motor, or by a Fottinger coupling.
REFERENCES:
patent: 3432387 (1969-03-01), Jonsson
patent: 3627632 (1971-12-01), Acher et al.
patent: 3751336 (1973-08-01), Angelini et al.
patent: 3844884 (1974-10-01), Frank et al.
patent: 3855059 (1974-12-01), Groves et al.
patent: 3979258 (1976-09-01), Schweiger et al.
Kent's Mechanical Engineers Handbook, 12th Ed., .COPYRGT.1964, John Wiley & ons, N.Y., Carmichael Editor, pp. 15-36-15-37, 15-93-15-95.
Cangialosi Sal
Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
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