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Yamane, Yuichi; Araki, Shohei; Sakon, Atsushi*
no journal, ,
A new reactivity estimation method was applied to the data obtained from some subcritical cores of UTR-KINKI for comparison to other existing methods. The estimated reactivity value for about several dollars subcritical cores by using the method based on the power profile in quasi-steady state showed almost the same result as other methods such as Feynman-
and source jerk.
Yamane, Yuichi
no journal, ,
For the purpose of estimating the reactivity of a subcritical system based on the power profile in a quasi-static state after a reactivity insertion, a new method has been developed. By applying it to the data simulating neutron count rate, it was confirmed that a cubic spline curves converges in good accuracy to the true profile of power and its time-derivative.
Yamane, Yuichi
no journal, ,
A new reactivity estimation method developed based on the power profile in quasi-steady state has been improved. New method was applied to the time-series data calculated by one-point kinetics code AGNES to confirm it works well above -10
.
Yamane, Yuichi
no journal, ,
For the purpose to estimate reactivity in dollar unit of a subcritical nuclear fuel system based on the power profile in a quasi-steady state, Savitzky-Golay method was applied to smooth an experimentally-obtained neutron count rate data and to calculate time-differential of it. As a result, a feasibility of such estimation method was clearly shown.
Yamane, Yuichi
no journal, ,
For the purpose of estimating the reactivity of a subcritical system based on the power profile in a quasi-static state after a reactivity insertion, a new method has been developed. By using a linear equation which is obtained by integrating the power profile equation eutron count rate, it was confirmed that the length of moving average is determined regorously.
Yamane, Yuichi; Araki, Shohei; Kitamura, Yasunori*; Misawa, Tsuyoshi*
no journal, ,
A new reactivity estimation method has been developed based on the power profile in quasi-steady state. Several subcritical cores were set up in KUCA A-core and neutron count rate was measured to apply estimation methods for comparison. The values obtained by new method, E, in an near-critical core and calculated value by using MVP code, C, show C/E in the range between 0.9 and 1.5.