1981•Transactions of the American Nuclear SocietyRequires access
Fission rate assessments in the FFTF using passive techniques
D.W. Wootan, John A. Rawlins, E.P. Lippincott, L.S. Kellogg, W.Y. Matsumoto, J.W. Daughtry
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Abstract
Fission rate assessments are being made in FFTF to provide input for determination of power distribution, peak power, total power, fuel burnup distribution, conversion ration and neutron spectral information by the multiple foil reaction rate method. A goal of the initial FFTF Characterization Program is to measure isotopic fission rates to an accuracy of 2 to 5% throughout FFTF by radiometric techniques. To achieve this goal, measurements were made in the FFTF In-Reactor Thimble to reduce the uncertainties of key parameters needed for radiometric fission rate mapping of the FFTF core.