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A pressurized water reactor in which automatic control is achieved by varying the average density of the liquid moderator-cooiant is patented. Density is controlled by the temperature and power level of the reactor ftself. This control can be effected by the use of either plate, pellet, or tubular fuel elements. The fuel elements are disposed between upper and lower coolant plenum chambers and are designed to permit unrestricted coolant flow. The control chamber has an inlet opening communicating with the lower coolant plenum chamber and a restricted vapor vent communicating with the upper coolant plenum chamber. Thus, a variation in temperature of the fuel elements will cause a variation in the average moderator density in the chamber which directly affects the power level of the reactor.
Authors:
Publication Date:
OSTI Identifier:
4055848
Report Number(s):
US 2990349
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Research Org:
Originating Research Org. not identified
Country of Publication:
United States
Language:
English
Subject:
REACTOR TECHNOLOGY; CONFIGURATION; CONTROL; CONTROL SYSTEMS; DENSITY; FUEL ELEMENTS; LIQUID FLOW; PATENT; PELLETS; PLATES; PRESSURE; REACTORS; TEMPERATURE; TUBES; VARIATIONS; VESSELS; WATER COOLANT; WATER MODERATOR