ANALYSIS OF THE VARIOUS MODES OF FISSION PRODUCT RELEASE FROM LWR FUEL
Several projects for the measurement and analysis of the volatile fission product (VFP) release in water reactor fuels under transient conditions have been recently concluded or are entering into the final phase. Though the agreement between measured and predicted release rates seems to be satisfactory, a closer scrutiny of the models used by the different teams reveals a disparity in the data for physical properties and diversities in the fundamental hypotheses. A study is being therefore carried out at the JRC aimed at a deeper understanding of the physics of the processes which are expected to influence the fuel behaviour and VPF release under various conditions. Three forms of release were investigated: 1) gross release involving a mixture of stable VFP, 2) release of single radioactive isotopes, 3) release of FP under particulate form. The results of these studies, which have in part been separately published were finally integrated into the computer codes FUTURE and MITRA. In these codes the release models are merged into a comprehensive scenario representing the evolving fuel microstructure.
Bibliographic Reference: JAHRESTAGUNG KERNTECHNIK 1987, KARLSRUHE (GERMANY), JUNE 2-4, 1987 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33457 ORA
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Record Number: 1989126037601 / Last updated on: 1989-01-01
Available languages: en