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Report No.
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Development of reactor kinetics analysis code

Takamatsu, Kuniyoshi; Nakagawa, Shigeaki ; Takeda, Tetsuaki

A reactor kinetics analysis code called the TAC/BLOOST code was developed for High Temperature Gas-Cooled Reactors (HTGRs). The TAC/BLOOST code can use a divided core model with region temperature coefficients. In this study, a validation of the TAC/BLOOST code was conducted with the experimental data of the High Temperature Engineering Test Reactor (HTTR). As a result, some improved points of the property changes of the fuels and the structures according to the burnup effect, the gap changes among the blocks, the gap changes between the fuel compact and the graphite sleeve, and the cross section changes of the coolant were clarified. Moreover, prediction analyses of the gas circulator tripping tests can be showed within 3% accuracy.

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