公开(公告)号：US3855060A

公开(公告)日：1974-12-17

申请号：US27047072

申请日：1972-07-10

Applicant: COMBUSTION ENG

Inventor： DIETRICH J ,  GROVES M

IPC: G21C7/16 ,  G21C17/12 ,  G21C19/04

CPC classification number: G21C17/12 ,  G21C7/16 ,  G21C19/04 ,  G21Y2002/301 ,  G21Y2002/50 ,  G21Y2004/30 ,  G21Y2004/304 ,  G21Y2004/40 ,  Y02E30/39

Abstract: A hydraulic system for controlling the position of neutron absorber elements with respect to a reactor fuel assembly, the control system incorporating means for preventing absorber element ''''blow-out'''' in the event of a pressure vessel rupture. The blow-out protection means includes closed end cylinders which define extensions of the guide tubes in which the absorber elements move and pistons attached to the absorber elements and movable in said guide tube extensions; each piston cooperating with a guide tube extension to define a restricted flow path for fluid in said tube extension above the absorber element.

Abstract translation: 一种用于控制中子吸收器元件相对于反应堆燃料组件的位置的液压系统，该控制系统包括用于在压力容器破裂的情况下防止吸收元件“吹出”的装置。 吹出保护装置包括封闭的端部气缸，其限定引导管的延伸部分，吸收器元件在其中移动，活塞附接到吸收器元件并可在所述引导管延伸部中移动; 每个活塞与引导管延伸部协作以限定在吸收器元件上方的所述管延伸部中的流体的限制流动路径。

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.