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The objective of this 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 transmutation of the long lived fission products was shown to be not feasible in fast reactors. Times for a quantitative transmutation would be longer than 100 years with at least a 5-fold recycling.
The burning of plutonium has been investigated for the fast reactor and the gas cooled high temperature reactor (HTR). The HTR can burn down the plutonium during one fuel subassembly lifetime to a much larger extent than in fast reactors of up to date design.
The influence of the lanthanides on the core properties of fast reactors is similar to that of the MAs. Very efficient separation techniques have to be developed. Literature on the study of different spallation systems and their intercomparison has shown that they can be very efficient transmutation devices. Several aspects need clarification (ie the feasibility of the intense high energy accelerator beam in non pulsed operation, the verification of the claimed safety advantages of the subcritical systems and the material problems linked with the irradiation by high energy particles). s).

Additional information

Authors: WEHMAN U, Siemens AG, Bergisch-Gladbach (DE);SPERBER F, Siemens AG, Bergisch-Gladbach (DE);STREHLEN U, Siemens AG, Bergisch-Gladbach (DE)
Bibliographic Reference: EUR 16605 EN (1995) 63pp., FS, ECU 8.50
Availability: Available from the (2)
ISBN: ISBN 92-827-5065-5
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