BWR control rod

Patent · Tue Aug 29 04:00:00 EDT 1989

OSTI ID:5319298

Gordon, G M

This patent describes an improvement to an elongate flat planar member comprising a portion of a nuclear reactor control rod for insertion within the core of a nuclear reactor for control of the reaction. The planar members of the control rod comprising in combination: a plurality of tubes defining cylindrical volumes and having square cross sections exteriors, each tube defining a cylinder of constant sidewall thickness sufficient for defining therewithin a cylindrical volume for containment of neutron absorbing poisons; corner sections integrally formed to the constant sidewall thickness cylinder having a placement on the outside of the cylinder at 90 intervals to the sidewalls of the constant sidewall thickness tube, the four corner sections defining volumes of increased thickness neutron absorbing poisons confined within each of the cylindrical volumes in the tube of constant sidewall thickness. The tubes joined in side-by-side relation by welding at the corner sections to form the elongate flat planar member of the control rod, the improvement comprising a flexible sheath fastened around the flat planar member, the sheath not fastened under tension. The sheath fastened at the extremities thereof to the control rod to enclose the welded side-by-side square exterior sectioned tubes in water tight relation.

• Assignee: General Electric Co., San Jose, CA
• Patent Number(s): US 4861544
• Application Number: PPN: US 7-159972A
• OSTI ID: 5319298
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
BWR TYPE REACTORS
CONTROL ELEMENTS
CONTROL SYSTEMS
DESIGN
FABRICATION
JOINING
REACTOR COMPONENTS
REACTOR CONTROL SYSTEMS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WELDING