CIRCUITRY AND CIRCUIT ELEMENTS Radiation DetectorsAnalogAnalog is defined as a mechanism in which data is represented by continuously variablephysical quantities. As it applies to the intermediate range, the output of the intermediaterange is an analog current. Due to the wide range of the flux measured, use oflogarithmic circuitry is required for indication on a single scale instrument. Analog isused in contrast to digital to refer to circuits in which the magnitude of the signal carriesthe information. Figure 30(A) illustrates an example of an analog display, and 30(B)illustrates a digital display.Figure 30 Analog and Digital DisplaysLogarithmLogarithm is defined as the exponent that indicates the power to which a number is raisedto produce a given number (i.e., the logarithm of 100 to the base 10 is 2).When discussing nuclear instrumentation, this term refers to the electronic circuitry of thesource and intermediate ranges. These ranges utilize logarithms due to the wide rangeof measured flux and the necessity to measure that flux on a single meter scale.ReactorPeriodReactor period is defined as that amount of time, normally in seconds, required forneutron flux (power) to change by a factor of e, or 2.718.IC-06 Page 56 Rev. 0
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
