DRAGON: CONTROL SYSTEM

Journal Article · Fri Jul 01 04:00:00 EDT 1960 · Nuclear Eng.

OSTI ID:4152821

Dean, J R

The control system for the Dragon 20-Mwh heliumcooled reactor is outlined in some dethil. Twenty-four absorber rods containing boron carbide are to be lowered into holes in the reflector near the core edge. Their drive mechanisms and the motor are described at length; the motor is a stepping motor developed for operation in any direction and at any speed, and it serves as a means of control since it is sensitive to overload or obstruction. The gearbox- scheme is also given together with maintenance and lubrication problems which may arise. In reactor operation, the motor will lower only one rcd at a time; one rod will be used for automatic regulation of gas outlet temperature and 3 or 4 rcds will be safety rcds, while the remaining rcds will be under manual control. All rcds cam be released by an emergency button. (D.L.C.)

• Research Organization: OEEC High Temperature Reactor Project, AEE, Winfrith Eng.
• NSA Number: NSA-14-018662
• OSTI ID: 4152821
• Journal Information: Nuclear Eng., Journal Name: Nuclear Eng. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BORON CARBIDES
CONTROL ELEMENTS
CONTROL SYSTEMS
DRAGON
GAS COOLANT
HELIUM
LUBRICATION
MACHINE PARTS
MAINTENANCE
MOTION
MOTORS
OPERATION
REACTOR SAFETY
REACTOR TECHNOLOGY
REACTORS
REFLECTORS
TEMPERATURE
VARIATIONS