Power flattening and minor actinide burning in a thorium fusion breeder

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dc.authorid0000-0003-2844-8061
dc.contributor.authorSahin, S
dc.contributor.authorSahin, HM
dc.contributor.authorSozen, A
dc.contributor.authorBayrak, M
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2002
dc.departmentNiğde ÖHÜ
dc.description.abstractA neutronic analysis has been performed for a thorium fusion breeder with a special task of burning minor actinides Np-237, Am-241, Am-243 and Cm-244 and production of U-233, Pu-238, Am-242m and Cm-245 for spacecraft application. Pu-238 is an important radioisotopic energy source for spacecraft generators. As potential nuclear fuels in the foreseeable future, U-233, Am-242m and Cm-245 would allow one to build extremely compact space reactors. Natural lithium has been selected as the coolant medium for the nuclear heat transfer out of the fuel zone. Minor actinides out of 5 and 10 units of LWRs per metre of blanket height have been mixed with ThO2. Higher fission rates in minor actinides enables one to realise a power flattening in the fissile zone over three years of plant operation by a gradual increase in the radial direction at start-up. This has significant advantages with respect to plant operation over the long term and also with respect to a uniform utilisation of the nuclear fuel in the fissile zone. After three years of plant operation, the net U-233 production is similar to300 kg per metre of blanket height. The Pu-238 yield is 21 and 41 kg for a waste actinide charge out of 5 and 10 units of LWRs per metre of blanket height, respectively, and the Cm-245 yield is 1.1 and 2 kg, respectively. The net Am-242m production is practically nil. With waste actinides out of 10 reactor units per metre of blanket height, the flattening of the nuclear heat production density in the fissile zone is almost perfect. Waste actinides out of five reactor units per metre of blanket height allow still an excellent power flattening. The quasi-constant power shape is saved over 36 months. (C) 2002 Elsevier Science Ltd. All rights reserved.
dc.identifier.doi10.1016/S0196-8904(01)00077-2
dc.identifier.endpage815
dc.identifier.issn0196-8904
dc.identifier.issue6
dc.identifier.scopus2-s2.0-0036532819
dc.identifier.scopusqualityQ1
dc.identifier.startpage799
dc.identifier.urihttps://dx.doi.org/10.1016/S0196-8904(01)00077-2
dc.identifier.urihttps://hdl.handle.net/11480/5735
dc.identifier.volume43
dc.identifier.wosWOS:000174569500005
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofENERGY CONVERSION AND MANAGEMENT
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectminor actinides
dc.subjectthorium
dc.subjectspace reactor fuel
dc.subjectpower flattening
dc.subjectfusion breeder
dc.titlePower flattening and minor actinide burning in a thorium fusion breeder
dc.typeArticle

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