INSTRUMENTATION AND CONTROLS DIVISION SEMIANNUAL PROGRESS REPORT FOR PERIOD ENDING JULY 31, 1953

Published: United States : [publisher not identified], 1954.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1954.
Physical Description: microopaque : positive ; 8 x 13 cm

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Summary

S>The sensitivity of techniques for the monitoring of liquid in terface levels by bubbling air through dip tubes is improved by the use of a modified Taylor 206 transmitter. A method is proposed for level measurement by electrical capacity techniques. Associated pulse amplitude and monitoring circuits are also described. An orifice-type flowmeter was designed for the measurement of highly radioactive fluids, incorporating a dip tube for liquid head or back-pressure recording. A continuously standardizing precision potentiometer was developed as a versatile source of voltage for control and reconding of transduced quantities. Water in PDA fiow solutions is detected by a color comparator circuit which monitors the decolorization of permanganate by the C/sub 2/H/sub 2/ liberated from a water-CaC/sub 2/ reaction. Circuits are presented for an improved linear count-rate meter, a preamplifier for electron-attachment studies, and an a-c operated feedback electrometer. Performance curves were obtained for a B/sup 10/ F/sub 3/ proportional counter of small effective volume. The counter described has an effective volume of 1.2 cc, filled with BF/sub 3/ at 15 psig, with a calculated efficiency of 10%. The design and response of a three-section, fast- neutron counter for application to low neutron flux dosimetrv are given A U/sup 235/ thermopile was constructed which is capable of measuring thermal-neutron fluxes from 5 x 10/sup 7/ to 5 x 10/sup 11/ nv. Testing data for a Magnaflow continuous or pulsating liquid flowmeter are given. (D.L.C.)

Report Numbers

ORNL-1694

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: W-7405-ENG-26
NSA number: NSA-14-021679
OSTI Identifier 4171133
Research organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States).

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