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Title: Nuclear reactor control column

The nuclear reactor control column comprises a column disposed within the nuclear reactor core having a variable cross-section hollow channel and containing balls whose vertical location is determined by the flow of the reactor coolant through the column. The control column is divided into three basic sections wherein each of the sections has a different cross-sectional area. The uppermost section of the control column has the greatest cross-sectional area, the intermediate section of the control column has the smallest cross-sectional area, and the lowermost section of the control column has the intermediate cross-sectional area. In this manner, the area of the uppermost section can be established such that when the reactor coolant is flowing under normal conditions therethrough, the absorber balls will be lifted and suspended in a fluidized bed manner in the upper section. However, when the reactor coolant flow falls below a predetermined value, the absorber balls will fall through the intermediate section and into the lowermost section, thereby reducing the reactivity of the reactor core and shutting down the reactor.
Authors:
 [1]
  1. (Plum Borough, PA)
Publication Date:
OSTI Identifier:
864300
Report Number(s):
US 4343764
DOE Contract Number:
EY-76-C-02-3045
Resource Type:
Patent
Research Org:
Westinghouse Electric Corp
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactor; control; column; nuclear; reactor; control; column; comprises; column; disposed; nuclear; reactor; core; variable; cross-section; hollow; channel; containing; balls; vertical; location; determined; flow; reactor; coolant; column; control; column; divided; basic; sections; sections; cross-sectional; uppermost; section; control; column; cross-sectional; intermediate; section; control; column; cross-sectional; lowermost; section; control; column; intermediate; cross-sectional; manner; uppermost; section; established; reactor; coolant; flowing; normal; conditions; therethrough; absorber; balls; lifted; suspended; fluidized; bed; manner; upper; section; reactor; coolant; flow; falls; below; predetermined; value; absorber; balls; fall; intermediate; section; lowermost; section; reducing; reactivity; reactor; core; shutting; reactor; reactor control; reactor control; reactor coolant; reactor coolant; reactor coolant; fluidized bed; nuclear reactor; nuclear reactor; nuclear reactor; reactor core; reactor core; coolant flow; predetermined value; intermediate section; intermediate section; control column; control column; control column; control column; control column; control column; upper section; column disposed; normal conditions; normal condition; column comprises; falls below; vertical location; hollow channel /376/976/