Approximate expression of energy released at 1st power peak in a criticality accident based on non-linear temperature feedback reactivity

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.