| Abstract: | A fuel rod behavior code FEMAXI-IV, presently under development, is an improved version of the FEMAXI-III code for the analysis of fuel rod behavior under transient conditions. To apply the FEMAXI-III code to transient conditions, the following additional models have been incorporated into the FEMAXI-III code: transient heat transfer model: axial gas mixing model; diffusion-type fission gas release model. This paper summarizes the above additional models, and the comparison of the FEMAXI-IV calculations with the experimental data. |
