Self-actuating reactor shutdown system
This patent describes a self-actuated reactor shutdown system utilizing a thermionic means responsive to at least coolant temperature and utilizing reactor coolant differential pressure for controlling the location of a neutron absorber element with respect to a reactor core region and for effecting release of the absorber element. The improvement consists of: electromagnetic means for controlling reactor coolant flow and coolant pressure differential across the absorber element, and thermionic means responsive to at least reactor coolant over-temperature conditions and operatively connected to the electromagnetic means for short-circuiting the electromagnetic means causing a change in coolant flow and a resulting decrease of the differential pressure across the absorber element allowing the element to drop into the reactor core region by gravitational force.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4770845
- OSTI ID:
- 6739125
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220400 -- Nuclear Reactor Technology-- Control Systems
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACTUATORS
AUTOMATION
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
COOLANTS
COOLING SYSTEMS
ENERGY SYSTEMS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
LIQUID FLOW
NEUTRON ABSORBERS
REACTOR COMPONENTS
REACTOR CONTROL SYSTEMS
REACTOR COOLING SYSTEMS
REACTOR CORES
REACTOR SAFETY
REACTOR SHUTDOWN
SAFETY
SHUTDOWNS
THERMIONICS