Total breeding gain

Plant Total breeding gain Breeding gain (core regions only)... 

A total breeding gain 1.16 was ejq)erimentally defined at the time of reprocessing of the fuel evacuated from the plant. The fuel cycle, based on mixed oxide fuel and PUREX reprocessing, has been closed and the first fuel subassembly made with reprocessed plutonium was loaded in the reactor in January 1980... 

The total breeding ratio in the Creys-Malville reactor was 1.24. In BN-350 a breeding ratio of 1.5 can be obtained because it has less neutron absorbing materials. Still higher breeding gain can be achieved in fast reactors at some sacrifice of safety control. 

Breeding gain is defined as BG= Wi(Ci-Di)/Fi Ci and Di - respectively rates of creation and destruction of atoms of i Wi - the worth of atoms of i, relative to atoms Fi - the total fission rate... 

A feature of the design flexibility with regard to the breeding characteristics, either the suppression of the axial and radial blanket, or the addition of axial blanket (up to a total of 0.8 m) and of one additional radial breeder row are possible giving a range of brwding gain from -0,2 to +0,15. 

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