Nuclear reactor shutdown control rod assembly

Patent · Tue Mar 29 00:00:00 EST 1988

OSTI ID:5075142

Bilibin, K

This patent describes a nuclear reactor having a reactor core and a reactor coolant flowing therethrough, a temperature responsive, self-actuated nuclear reactor shutdown control rod assembly, comprising: an upper drive line terminating at its lower end with a substantially cylindrical wall member having inner and outer surfaces; a lower drive line having a lower end adapted to be attached to a neutron absorber; a ring movable disposed about the outer surface of the wall member of the upper drive line; thermal actuation means adapted to be in heat exchange relationship with coolant in an associated reactor core and in contact with the ring, and balls located within the openings in the upper drive line. When reactor coolant approaches a predetermined design temperature the actuation means moves the ring sufficiently so that the balls move radially out from the recess and into the space formed by the second portion of the ring thereby removing the vertical support for the lower drive line such that the lower drive line moves downwardly and inserts an associated neutron absorber into an associated reactor core resulting in automatic reduction of reactor power.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4734252
• Application Number: TRN: 88-021690
• OSTI ID: 5075142
• Resource Relation: Patent File Date: Filed date 7 Aug 1986
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
CONTROL ELEMENTS
DESIGN
AUTOMATION
COOLANTS
COOLING
HEAT EXCHANGERS
OPERATION
REACTOR COOLING SYSTEMS
REACTOR CORES
REACTOR SAFETY
REACTOR SHUTDOWN
THERMODYNAMICS
COOLING SYSTEMS
ENERGY SYSTEMS
REACTOR COMPONENTS
SAFETY
SHUTDOWNS
220400* - Nuclear Reactor Technology- Control Systems
220900 - Nuclear Reactor Technology- Reactor Safety