MODELING OF CESIUM RELEASE FROM LIGHT-WATER REACTOR-FUEL UNDER SEVEREACCIDENT CONDITIONS

Several empirically based models of fission product release, recently developed at various laboratories for severe reactor accident conditio ns, have been compared with the measured cesium release from light wat er reactor fuel in the VI series of experiments performed at the Oak R idge National Laboratory. The models under consideration treat the und erlying process of release by first-order kinetics or by classical dif fusion theory. In addition, a state-of-the-art approach using an artif icial neural network is evaluated.