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

Abstract

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.more » (N.W.R.)« less

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

Citation Formats

. HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report. United States: N. p., 1964. Web. doi:10.2172/4077219.
. HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report. United States. https://doi.org/10.2172/4077219
. 1964. "HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report". United States. https://doi.org/10.2172/4077219. https://www.osti.gov/servlets/purl/4077219.
@article{osti_4077219,
title = {HIGH-TEMPERATURE MATERIALS AND REACTOR COMPONENT DEVELOPMENT PROGRAMS. VOLUME III. INSTRUMENTATION AND CONTROLS. Third Annual Report},
author = {},
abstractNote = {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.)},
doi = {10.2172/4077219},
url = {https://www.osti.gov/biblio/4077219}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1964},
month = {2}
}