Fission-chamber-compensated self-powered detector for in-core flux measurement and reactor control

Patent · Tue Apr 15 04:00:00 EST 1986

OSTI ID:5831208

Neissel, J P

An apparatus is described for in-core flux measurement and nuclear reactor control consisting of: a self-powered rhodium neutron detector for producing an output signal corresponding to reactor power level; first amplifier means having an input for receiving the neutron detector output signal, and the first amplifier means producing a corresponding first amplifier output signal (V/sub 1/); a fission chamber for producing an output signal corresponding to reactor power level; second amplifier means having an input for receiving the fission chamber output signal, the second amplifier means producing a corresponding second amplifier output signal; first differentiating means coupled to the output of the second amplifier means including a resistor and a capacitor coupled to provide a time constant T/sub 1//1n 2 where T/sub 1/ is the half-life of the ground state of Rh/sup 104/; third amplifier means having an input for receiving the second amplifier means output signal, the third amplifier means having a voltage gain of (1-c)/c; second differentiating means coupled to the output of the third amplifying means and including a capacitor and resistor providing a time constant T/sub 2//1n 2 where T/sub 2/ is the half-life of the isomeric state of Rh/sup 104/; and fourth amplifier means including corresponding inputs for receiving the output of the first amplifier means, a processed output from the first differentiating circuit, and a processed output from the second differentiating circuit, and for producing a corresponding summed output signal.

• Assignee: General Electric Co., San Jose, CA
• Patent Number(s): US 4582673
• OSTI ID: 5831208
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
AMPLIFIERS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPACITORS
CONTROL SYSTEMS
DELAYED NEUTRONS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
ENERGY LEVELS
EQUATIONS
EQUIPMENT
FERMIONS
FISSION CHAMBERS
FISSION NEUTRONS
GROUND STATES
HADRONS
HALF-LIFE
IN CORE INSTRUMENTS
INTERMEDIATE MASS NUCLEI
IONIZATION CHAMBERS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NEUTRON DETECTORS
NEUTRONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
POWER REACTORS
PROMPT NEUTRONS
RADIATION DETECTORS
RADIOISOTOPES
REACTOR CONTROL SYSTEMS
REACTOR INSTRUMENTATION
REACTORS
RESISTORS
RHODIUM 104
RHODIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SENSITIVITY
SIGNALS
TIME DEPENDENCE