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Beryllium samples have been irradiated in BR2, the materials testing reactor of the Nuclear Research Centre SCK/CEN at Mol, Belgium, up to fission fluence values of 5.2 1022 n/cm2 at low temperature.
The gas formation (helium, tritium), as measured by SCK/CEN, as well as the induced swelling of the beryllium samples and the enhancement of the swelling due to annealing have been presented at the 17th SOFT Conference (Rome, 14–18 Sept., 1992).
Since this conference, helium measurements on the same samples have been carried out at RI and calculations of the gas production have been performed, taking into account the various formation schemes.
The experimental results from SCK/CEN and from RI are compared with the calculated gas formations.
beryllium irradiations, helium formation, tritium formation, MTRs
De Raedt, CM
Rockwell International Corporation, Canoga Park, CA