HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report

Technical Report · Fri Feb 28 00:00:00 EST 1964

DOI:https://doi.org/10.2172/4077219· OSTI ID:4077219

The development of instruments for controlling reactor operation is reported. A shim-scram actuator was designed incorporating an electromagnetic dnlve for shim and scram, a shim speed limiting device, and a force feedback position indicator. A three-channel trip circuit and a two-out-of-three logic circuit using controlled switches in place of transistors was designed, built, and tested. A capacitance-type temperature sensor was operated in an inert atmosphere at temperatures up to 3782 deg F. Models of a gridded and a compensated a-c ionization chamber were tested in both thermal neutron and gamma environments. The compensated a-c ionization chamber demonstrated better than 98% gamma compensation at a thermalneutron flux of 5 x 10/sup -11/ nv and 1 Mw reactor power. Unpowered charged-fragment neutron detectors using boron-10 or uranium-235 as the emitter coating were demonstrated to respond linearly to changes of thermalneutron flux. Potentials, developed within the detecting circuit, possibly due to contact potentials, are suspected to be the cause of detector output-current instability as a function of time. Fission counter operation at 816 deg C was demonstrated to be feasible, but operation was not entirely satisfactory. Adequate reactor power range neutron sensing to 535 deg C is feasible using uncompensated d-c ionization chambers. (N.W.R.)

• Research Organization: General Electric Co. Advanced Technology Services, Cincinnati
• DOE Contract Number: AT(40-1)-2847
• NSA Number: NSA-18-015447
• OSTI ID: 4077219
• Report Number(s): GEMP-270C
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: United States
• Language: English

Related Subjects

REACTOR TECHNOLOGY
BORON 10
CAPACITORS
CIRCUITS
COATING
CONTROL
CONTROL ELEMENTS
CURRENTS
ELECTRIC POTENTIAL
ELECTRICITY
FISSION CHAMBERS
GAMMA RADIATION
HIGH TEMPERATURE
INERT GASES
INSTRUMENTS
IONIZATION CHAMBERS
MACHINE PARTS
MATERIALS TESTING
MEASURED VALUES
MOTORS
NEUTRON DETECTION
NEUTRON FLUX
NUCLEAR REACTIONS
OPERATION
PLANNING
POWER
REACTOR SAFETY
REACTORS
SENSITIVITY
SERVOMECHANISMS
SHUTDOWN
STABILITY
SWITCHES
TEMPERATURE
TESTING
THERMAL NEUTRONS
TRANSISTORS
URANIUM 235
VARIATIONS
VELOCITY