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Nomura, Yasushi*; Okuno, Hiroshi; Miyoshi, Yoshinori
Nuclear Technology, 148(3), p.235 - 243, 2004/12
Times Cited Count：3 Percentile：23.52(Nuclear Science & Technology)no abstracts in English
Yamane, Yuichi
no journal, ,
Simplified estimation methods and slow transient data of TRACY experiment are compared for the purpose of developing the method to estimate the first peak power in a criticality accident with a continuous reactivity insertion such as flowing of nuclear fuel solution into a vessel. It is shown that the estimated values are in the range between twice and a half of the experimental data.
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%.
