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Impact of ADS on nuclear fuel cycles
KTH, School of Engineering Sciences (SCI), Physics.
(English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100Article in journal (Other academic) Submitted
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-6793OAI: oai:DiVA.org:kth-6793DiVA: diva2:11603
Note
QS 20120328Available from: 2007-02-19 Created: 2007-02-19 Last updated: 2012-03-28Bibliographically approved
In thesis
1. Why Faster is Better: On Minor Actinide Transmutation in Hard Neutron
Open this publication in new window or tab >>Why Faster is Better: On Minor Actinide Transmutation in Hard Neutron
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

In this thesis, options for efficient transmutation of transuranium elements are discussed. The focus is on plutonium, americium and curium mainly because of their long-term contribution to the radiotoxicity of spent nuclear fuel. Two innovative helium-cooled core designs are proposed, dedicated to the transmutation of actinides. The performance of the more promising of the two is studied in realistic transient fuel cycle scenarios. During the 1150 day irradiation cycle, a minor actinide consumption of 355 kg/GWth·year is achieved. An analysis of the efficiency of spallation neutron sources in helium-cooled cores is also performed. It is shown that the proton source efficiency, ψ∗, is improved by about 10% when helium is used as coolant, rather than lead-bismuth eutectic. Further, a proposal is made to transmute actinides in the upper part of a BWR core. A net consumption of transuranics is shown possible in the BWR park already when 50% of the BWR fuel is of the proposed evolutionary type.

The thesis concludes that efficient transmutation of transuranic elements in dedicated helium-cooled subcritical cores is possible. But, in many instances fuel cycles without dedicated cores may lead to comparable final states. Especially, the evolutionary BWRfuel proposed seems interesting.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. x, 86 p.
Series
Trita-FYS, ISSN 0280-316X ; 2007:05
Keyword
nuclear physics, nuclear engineering
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4280 (URN)978-91-7178-567-1 (ISBN)
Public defence
2007-02-23, F3, KTH, Lindstedtsvägen 26, Stockholm, 14:15
Opponent
Supervisors
Note
QC 20100820Available from: 2007-02-19 Created: 2007-02-19 Last updated: 2011-10-03Bibliographically approved

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