Calculation of the reactivity change from voiding the heavy water coolant of the plutonium recycle test reactor Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/d791sk44h

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  • A method is developed for calculating the reactivity worth of the heavy water coolant of the Plutonium Recycle Test Reactor (PRTR). The coolant reactivity worth is determined by calculating the effective multiplication constant of the reactor core with and without the coolant in given process tubes. The calculational method includes a method for calculating the resonance integrals for PRTR circular 19-rod cluster fuel elements based on experimental resonance integral data for single UO₂ fuel rods and hexagonal 19-rod clusters of UO₂ fuel rods. The calculational method is evaluated by comparing the theoretical results with experimental coolant reactivity measurements previously obtained at the PRTR. The accuracy of the calculational method is shown to be within the experimental accuracy of the cross section data by calculating the reactivity change produced by the change in each individual multigroup cross section.
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