Abstracts and Available Papers Presented at the
2000 International RERTR Meeting
HEU/LEU-Conversion of BER II Successfully Finished
K. Haas, C.-O. Fischer, H. Krohn
Hahn-Meitner-Institut • Glienicker Straße 100 • D-14 109 Berlin
Abstract
The BER II (Berliner Experimental Reactor) research reactor is a swimming pool type reactor located in Berlin, Germany. The reactor operates with a thermal power of 10 MW and is primarily used to produce neutrons for neutron scattering experiments.
The conversion from HEU- to LEU-fuel elements began in August, 1997. At the last RERTR-Meeting 1999 in Budapest, Hungary, Hahn-Meitner-Institut (HMI) presented a "Status Report" on the conversion of 10 HEU/LEU mixed cores. In February 2000, HMI finished the HEU/LEU-conversion. Hereby, the first pure LEU-standard-core went into operation.
Our second LEU-core just ends its operation at the end of July. The third LEU-core will be built up in the beginning of August. The average burn-up rate was improved from 50 - 55% (HEU) to 60 - 65% (LEU). Therefore, only 14 elements/year are now used instead of 28/year.
The following report describes our first steps in building pure LEU-cores from mixed HEU/LEU-cores, as well as our initial experience using the pure LEU-cores.
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Contact:
Dr. Karin Haas
Hahn-Meitner-Institut, Berlin GmbH
Glienicker Str. 100
D-14109 Berlin, Germany
Phone: ++49-30-8062-2745
Fax: ++49-30-8062-2082
E-mail: hass_k@hmi.de
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