REACTOR INSTRUMENTATION AND CONTROL PROGRESS REPORT NO. 77

Technical Report · Fri May 31 00:00:00 EDT 1963

OSTI ID:4711771

CIRCULATlNG-BALL REACTIVITY CONTROL. Wafertype, and copper-sleeved drive rods were tested in a modified electromagnetic unit having wide-faced pole pieces and coils. A preliminary shim-scram actuator driven by electromagnetic units, with a hydraulic shim-rate limiter in the withdrawal direction, was assembled and operated to demonstrate feasibility, and to aid in the design of a prototype actuator. STATIC SWITCHING. The control circuit for the linear induction-motor was modified for operation into a 3-phase 4-wire wye-connected linear induction-motor. The basic scram circuit was modified to work with the control circuit to provide a combination shim and scram control. CAPACITANCE TEMPERATURE SENSOR. Work was performed on the exploration of maximum operating temper. atures of alumina and beryllia, the fabrication and initial testing of a molybdenum-beryllia shielded-probe assembly, development of a transistorized transmission system, and the investigation of sensor-cable length effects. HIGHTEMPERATURE EXTENSION OF CONVENTIONAL NUCLEAR SENSORS. Testing of fission counters and fissioncounter components to 1500 deg F, d-c ionization chambers to 1000 deg F, and ionization chamber components to 1200 deg F was continued. DEVELOPMENT OF NUCLEAR SENSORS. Several high-temperature gridded a-c ionization chambers were built and tested. A cylindrical gridded chamber was designed and built for operation at low temperatures. The design of a 1000 deg F cylindrical chamber was completed. A charged-fragment neutron detector containing a grid structure for capturing emitted secondary electrons was constructed. A charged- fragment detector was designed with a gold plating on the boron-10-coated cathode to absorb the emitted alpha particles. (B.O.G.)

• Research Organization: General Electric Co. Advanced Technology Services, Cincinnati
• DOE Contract Number: AT(40-1)-2847
• NSA Number: NSA-17-029712
• OSTI ID: 4711771
• Report Number(s): GEMP-77
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: United States
• Language: English

Related Subjects

REACTOR TECHNOLOGY
ABSORPTION
ALPHA PARTICLES
ALUMINUM
BERYLLIUM
BERYLLIUM ALLOYS
BORON 10
CAPTURE
CATHODES
CIRCUITS
COATING
CONTROL ELEMENTS
CONTROL SYSTEMS
CYLINDERS
ELECTROMAGNETIC FIELDS
ELECTRONIC EQUIPMENT
ELECTRONS
EMISSION
FISSION CHAMBERS
FISSION PRODUCTS
GOLD
HIGH TEMPERATURE
IONIZATION CHAMBERS
MOLYBDENUM ALLOYS
NEUTRON DETECTION
OPERATION
PLANNING
PRODUCTION
RADIATION DETECTORS
REACTIVITY
RODS
SEMICONDUCTORS
SENSITIVITY
SHUTDOWN
TEMPERATURE
TESTING