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- W2039905571 abstract "Abstract A neutronic analysis has been performed for a thorium fusion breeder with a special task of burning minor actinides 237 Np , 241 Am , 243 Am and 244 Cm and production of 233 U , 238 Pu , 242 m Am and 245 Cm for spacecraft application. 238 Pu is an important radioisotopic energy source for spacecraft generators. As potential nuclear fuels in the foreseeable future, 233 U , 242 m Am and 245 Cm 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 233 U production is ∼300 kg per metre of blanket height. The 238 Pu 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 245 Cm yield is 1.1 and 2 kg, respectively. The net 242 m Am 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." @default.
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- W2039905571 date "2002-04-01" @default.
- W2039905571 modified "2023-10-18" @default.
- W2039905571 title "Power flattening and minor actinide burning in a thorium fusion breeder" @default.
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- W2039905571 doi "https://doi.org/10.1016/s0196-8904(01)00077-2" @default.
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