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This document is the final report of the work which has been performed in the frame of the contract FI2W-CT91-0103 between the European Commission and Siemens AG. The objective of the study was to investigate the possibilities, limits and technological development steps needed for the transmutation of actinides and long-lived fission products in unconventional advanced reactors and other advanced transmutation devices. The main part of the work on transmutation of long-lived radionuclides dealt with the potential of fast reactors to transmute the minor actinides (MA) and the long-lived fission products Tc-99, I-129 and Cs-135. The MA transmutation has been investigated for the homogeneous and the heterogeneous concept and it has been shown that both concepts are similar with respect to their transmutation capability. One fast reactor with 5% average MA content could transmute the MA production of about 5 LWRs of the same power size each. For the MA content an upper limit of 5% is recommended in order to limit the deterioration of the sodium void effect and the Doppler constant. The transmutation of the long-lived fission products was shown to be not feasible in fast reactors. Their capture cross-sections are too small even in the case of an environment with optimum moderation by additional moderators such as ZrH(2), so that the times for a quantitative transmutation would be larger than 100 years with an at least five-fold recycling.

Additional information

Authors: WEHMAN U SPERBER F STREHLEN U, Siemens A G, Bergisch - Gladbach (DE)
Bibliographic Reference: EUR 16605 EN (1995) 63 pp., FS, ECU 8.50
Availability: Elsevier Science Publishers Ltd., Crown House, Linton Road, Barking, Essex IG11 8JU (GB)
ISBN: ISBN 92-827-5065-5
Record Number: 199511666 / Last updated on: 1995-12-12
Original language: en
Available languages: en