Neutron absorbing bar damping device

Details Neutron absorbing bar damping device Neutron absorbing bar damping device

1987-08-12

1989-05-02

Jordan, Charles T.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By movement of control element or by release of neutron...

G21C 720

Patent

active

048266485

ABSTRACT:
A neutron absorbing bar for use in a PWR has an integrated damping device comprising a cluster of vertical absorbent rods fixed to the arms of a spider having a central pommel connectable to a drive mechanism. A damping device in the pommel includes a cylinder slidably receiving piston urged into a downward projecting position by springs contained in the cylinder. The cylinder and the piston are so formed that the leak flow at a cross-sectional area offered to the liquid driven out of the cylinder by the piston gradually decrease as the latter moves from an outermost position. The piston carries a hydromechanical damper damping the initial impact of the bar upon a scram.

REFERENCES:
patent: 3321372 (1967-05-01), Challender
patent: 3762994 (1973-10-01), Kunzel
patent: 4073684 (1978-02-01), Cepkauskas
patent: 4711756 (1987-12-01), Nakazato

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