A Method of Predicting Interaction on Control Rod Worth through "Disturbance Parameters"

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概要

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• A method has been developed for predicting the interaction effect on control-rod worth and applied to a fast reactor system. The method is based on the exact perturbation theory to which several assumptions have been applied. These assumptions- numerically confirmed to be valid-all relate to separability of the effects on flux change brought by different factors of perturbation. The method permits prediction of the worth of a combination of any number of control rods solely from information obtained on single-rod worth calculations. Adoption of this method reduces from 2<SUP><I>N</I></SUP>N to <I>N</I>+1 the number of calculations necessary for N rods of interest. Comparison with results obtained by the conventional direct <I>k</I>-difference method has revealed that the present method predicts the worth of a combination of control rods to within a few percent-1.3% at most in seven numerical examples studied, covering both symmetric and a symmetric rod configurations and with the interaction effect ranging about -10+15%.

• 一般社団法人 日本原子力学会の論文

著者

• YAMAMOTO Masaaki

  Atomic Energy Research Laboratory, Hitachi Ltd.

• KONISHI Toshio

  Atomic Energy Research Laboratory, Hitachi Ltd.

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• A Method of Predicting Interaction on Control Rod Worth through "Disturbance Parameters"

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