Thermionic switched self-actuating reactor shutdown system
The patent describes a self-actuating reactor shutdown system incorporating a thermionic switched electromagnetic latch arrangement which is responsive to reactor neutron flux changes and to reactor coolant temperature changes. The system is self- actuating in that the sensing thermionic device acts directly to release (scram) the control rod (absorber) without reference or signal from the main reactor plant protective and control systems. To be responsive to both temperature and neutron flux effects, two detectors are used, one responsive to reactor coolant temperatures, and the other responsive to reactor neutron flux increase. The detectors are incorporated into a thermionic diode connected electrically with an electromagnetic mechanism which under normal reactor operating conditions holds the control rod in its ready position (exterior of the reactor core).
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4880596; A
- Application Number:
- PPN: US 7-120710A; TRN: 90-013939
- OSTI ID:
- 7176142
- Resource Relation:
- Patent File Date: 13 Nov 1987
- Country of Publication:
- United States
- Language:
- English
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Thermionic switched self-actuating reactor shutdown system
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Related Subjects
NUCLEAR POWER PLANTS
EQUIPMENT PROTECTION DEVICES
REACTOR CORES
CONTROL SYSTEMS
REACTOR SHUTDOWN
PLASMA SWITCHES
ELECTROMAGNETIC RADIATION
NEUTRON FLUX
REACTOR MONITORING SYSTEMS
SCRAM RODS
THERMIONIC DIODES
THERMIONIC REACTORS
CONTROL ELEMENTS
DIODE TUBES
ELECTRICAL EQUIPMENT
ELECTRON TUBES
EQUIPMENT
NUCLEAR FACILITIES
POWER PLANTS
POWER REACTORS
RADIATION FLUX
RADIATIONS
REACTOR COMPONENTS
REACTORS
SHUTDOWNS
SWITCHES
THERMAL POWER PLANTS
THERMIONIC TUBES
220400* - Nuclear Reactor Technology- Control Systems
220900 - Nuclear Reactor Technology- Reactor Safety