公开(公告)号：US3844884A

公开(公告)日：1974-10-29

申请号：US27677572

申请日：1972-07-31

Applicant: COMBUSTION ENG

Inventor： FRANK B ,  FLINN W ,  GROVES M

IPC: G21C7/16

CPC classification number: G21C7/16 ,  G21Y2002/50 ,  G21Y2004/30 ,  G21Y2004/40 ,  Y02E30/39

Abstract: An isolation valve particularly well suited for use in nuclear reactor hydraulic control systems is disclosed. The valve includes an electro-magnetic actuator which may be energized to open the valve thereby permitting the lift flow needed to move fission rate control devices with respect to a fuel assembly. The fission rate control devices are provided with elements comprised of magnetic material which, with the devices fully retracted from the fuel assembly, will be positioned within the magnetic field generated by the valve actuator whereby the devices will be magnetically held in the retracted position.

Abstract translation: 公开了一种特别适用于核反应堆液压控制系统的隔离阀。 阀包括电磁致动器，其可以被激励以打开阀，从而允许相对于燃料组件移动裂变率控制装置所需的升力。 裂变速率控制装置设置有由磁性材料组成的元件，其中从燃料组件完全缩回的装置将被定位在由阀致动器产生的磁场内，由此装置将被磁力地保持在缩回位置。

公开(公告)号：US3843471A

公开(公告)日：1974-10-22

申请号：US21130871

申请日：1971-12-23

Applicant: COMBUSTION ENG

Inventor： BEVILACQUA F ,  FLINN W ,  DIETRICH J ,  GROVES M

IPC: G21C7/16

CPC classification number: G21C7/16 ,  G21Y2002/206 ,  G21Y2002/402 ,  G21Y2004/30 ,  Y02E30/39

Abstract: 1. In a nuclear reactor, the reactor including a pressure vessel with a fuel assembly disposed therein and means for circulating a coolant under pressure through the vessel, the fuel assembly comprising a plurality of fuel elements containing fissionable material, an improved control system comprising: a plurality of guide tubes for movable neutron absorber elements extending through the fuel assembly, said guide tubes terminating within the pressure vessel; upper end filtering means, the upper end of each guide tube being terminated in said upper end fitting means, said upper end fitting means including a tubular extension for each guide tube, the upper end of said tubular extensions defining valve seats; buffer means positioned in the pressure vessel above and axially aligned with each of said end fitting means tubular extensions; tubular hydraulic cylinder defining means extending between the upper end of each of said tubular extensions and said buffer means; actuator piston means disposed for movement in each of said tubular cylinder defining means, each of said actuator piston means having an upper surface cooperating with said buffer means for valving action and a lower surface cooperating with said upper end fitting means defined valve seat to perform a valving action; neutron absorber element means disposed for movement in each of the guide tubes; means mechanically coupling each of said actuator piston means to associated absorber element means whereby the absorber element means may be moved relative to the fuel elements; means located externally of the pressure vessel for generating a control pressure; a plurality of control lines penetrating the pressure vessel, said control lines being commensurate in number with the actuator piston means and extending from said control pressure generating means to respective of said control pressure to the upper surfaces of said actuator piston means; valve means disposed in each of said control lines for selectively applying said control pressure to said hydraulic cylinder defining means through said buffer means to said upper surface of said actuator piston means whereby said absorber elements may be individually adjusted between positions commensurate with full insertion into and full retraction from the fuel assembly; and means for applying the pressure vessel internal coolant pressure to the lower surfaces of said actuator piston means.