Investigation of CANDU reactors as a thorium burner

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dc.contributor.authorŞahín, Sümer
dc.contributor.authorYıldız, Kadir
dc.contributor.authorŞahin, Hacı Mehmet
dc.contributor.authorAcır, Adem
dc.date.accessioned13.07.201910:50:10
dc.date.accessioned2019-07-16T08:24:35Z
dc.date.available13.07.201910:50:10
dc.date.available2019-07-16T08:24:35Z
dc.date.issued2006
dc.departmentMühendislik Fakültesi
dc.description.abstractLarge quantities of plutonium have been accumulated in the nuclear waste of civilian LWRs and CANDU reactors. Reactor grade plutonium can be used as a booster fissile fuel material in the form of mixed ThO2/PuO 2 fuel in a CANDU fuel bundle in order to assure reactor criticality. The paper investigates the prospects of exploiting the rich world thorium reserves in CANDU reactors. Two different fuel compositions have been selected for investigations: (1) 96% thoria (ThO2) + 4% PuO2 and (2) 91% ThO2 + 5% UO2 + 4% PuO2. The latter is used for the purpose of denaturing the new 233U fuel with 238U. The behavior of the reactor criticality k? and the burn-up values of the reactor have been pursued by full power operation for >~8 years. The reactor starts with k? = ~1.39 and decreases asymptotically to values of k? > 1.06, which is still tolerable and useable in a CANDU reactor. The reactor criticality k ? remains nearly constant between the 4th year and the 7th year of plant operation, and then, a slight increase is observed thereafter, along with a continuous depletion of the thorium fuel. After the 2nd year, the CANDU reactor begins to operate practically as a thorium burner. Very high burn-up can be achieved with the same fuel (>160,000 MW D/MT). The reactor criticality would be sufficient until a great fraction of the thorium fuel is burned up, provided that the fuel rods could be fabricated to withstand such high burn-up levels. Fuel fabrication costs and nuclear waste mass for final disposal per unit energy could be reduced drastically.
dc.description.sponsorshipThis work has been supported by the Research Fund of the Gazi University, Project # 07/2003-14.
dc.identifier.doi10.1016/j.enconman.2005.10.013
dc.identifier.endpage1675en_US
dc.identifier.issn0196-8904
dc.identifier.issue13-14en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage1661en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.enconman.2005.10.013
dc.identifier.urihttps://hdl.handle.net/20.500.12451/2940
dc.identifier.volume47en_US
dc.indekslendigikaynakScopus
dc.language.isoen
dc.relation.ispartofEnergy Conversion and Management
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectCANDU reactors
dc.subjectHigh Burn-up
dc.subjectPlutonium
dc.subjectThorium
dc.titleInvestigation of CANDU reactors as a thorium burner
dc.typeArticle

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