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Yamane, Yuichi
no journal, ,
For a criticality accident due to instantaneous insertion of reactivity, an approximate expression of the energy released during the 1st peak of the power profile was derived based on non-linear temperature feedback reactivity considering the 2nd order of temperature rise as an extension of Nordheim-Fuchs model. Its application to the data of TRACY experiment shows good agreement between the calculation and experiment.
Yamane, Yuichi
no journal, ,
For a criticality accident due to instantaneous insertion of reactivity, an equation has been derived based on one-point kinetics, by which equation the initial value of monotonically decreasing power following the first peak is expressed as a function of the initial excess reactivity and other kinetics parameters. The results obtained by using the equation and one-point kinetics code, AGNES, were compared to each other and the maximum difference between them was confirmed to be within 15%.
Yamane, Yuichi
no journal, ,
For criticality accidents due to instantaneous insertion of reactivity to the system with non-linear temperature reactivity feedback, an equation has been derived based on one-point kinetics, by which equation the total fission energy is expressed as a function of initial excess reactivity and other kinetics parameters. The results obtained by using the equation and one-point kinetics code, AGNES, were compared to each other to show that the difference between them decreased with increase of excess reactivity from several ten % to 4%.