TRANSIENT REACTIVITY MEASUREMENT
The usual reactor kinetics equations are shown to consist of three major components: a fast term, a product or quotient term, and a summation of transient terms. These can be synthesized by using a number of simple RC networks having time constants related to the fast time constant and to the decay constants of the various groups of delayed neutron emitters, plus either an analog multiplier or divider. A circuit is shown which incorporates these principles, using a diode divider. Curves are given of output reading, indicating transient reactivity, for input currents having constant positive period, obtained from a motor-driven potentiometer. It is shown that these curves are reasonably close to the calculated curves of reactor reactivity for such periods. It is shown that it is also possible to use a logarithmic amplifier plus a time constant network to indicate transient reactivity. Accuracy of indication can be made reasonably good for the first period or two, although the asymptotic values would correspond to inverse period rather than reactivity. (auth)
- Research Organization:
- Knolls Atomic Power Lab., Schenectady, N.Y.
- DOE Contract Number:
- W-31-109-ENG-52
- NSA Number:
- NSA-15-032667
- OSTI ID:
- 4837609
- Report Number(s):
- KAPL-M-RFS-2
- Country of Publication:
- United States
- Language:
- English
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