Nuclear reactor incorporating locking device for threaded bolt connections

Patent · Tue Dec 08 04:00:00 EST 1987

OSTI ID:5458714

Blaushild, R M

A nuclear reactor having a pressure vessel and a first element is described comprising a core barrel situated within the pressure vessel. The core barrel has a baffle former secured in and to the core barrel by bolted connections, and a second element comprising baffle plates secured to the inner surface of the baffle former by bolted connections, with a locking device to prevent loosening of bolted connections between the baffle former and at least one of the elements. The baffle former and at least one element are held together by a headed, threaded bolt engaged in a bore coaxially extending in the baffle former and at least one element and threadedly engaged in a threaded section in at least the baffle former. The threaded section has first threaded of a first direction, with the head of the bolt engaged with a shoulder about the bore in at least one element to hold the baffle formed and at least one element together, the head of the bolt having a first diameter and a cavity, having an unsymmetrical wall thereabout, in the end surface thereof. It comprises a recess in at least one element coaxial with the bore forming a wall thereabout and extending inwardly from the outer surface of at least one element, the recess having a second diameter greater than the first diameter, with at least one element having second threads in the wall of a direction opposite the direction of the first threads of the threaded bore; a locking nut having a base with a downwardly depending cylindrical wall thereabout.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4711760
• OSTI ID: 5458714
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BAFFLES
BOLTED JOINTS
CONTAINERS
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
FABRICATION
FASTENERS
FASTENING
FLOW REGULATORS
JOINING
JOINTS
PRESSURE VESSELS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTORS
THREADED JOINTS
WATER COOLED REACTORS
WATER MODERATED REACTORS