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The most important effects of neutron irradiation on beryllium are swelling, embrittlement and tritium retention. The helium produced by the 9Be(n,2n)2(4)He reaction is the cause of beryllium swelling and, at high neutron fluences, the main cause of tritium retention which is produced by further simultaneous reactions. A computer code capable of describing the helium and tritium behaviour in beryllium has been developed, by modifying an existing code for the modelling of the UO(2) performances in fission reactors. A new model describing the trapping effects on tritium due to chemical reactions and capture in helium-bubbles has been included in the code. The resulting code ANFIBE (ANalysis of Fusion Irradiated BEryllium) allows the calculation of gas distribution, induced swelling and helium and tritium release from beryllium. Good agreement between experimental and calculated swelling and tritium release has been found.

Additional information

Authors: DALLE DONNE M, KfK, Institut für Neutronenphysik und Reaktortechnik, Karlsruhe (DE);SCAFFIDI-ARGENTINA F, KfK, Institut für Neutronenphysik und Reaktortechnik, Karlsruhe (DE);FERRERO C, European Synchrotron Radiation Facility, Grenoble (FR);RONCHI C, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 6th International Conference on Fusion Reactor Materials (ICFRM-6), Stresa (IT), September 27 - October 1, 1993
Availability: Available from (1) as Paper EN 37888 ORA
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