Idealized Methods of Fuel and Poison Management

Zoned loading. By charging fuel of different enrichments to different zones in the reactor, or by using a different concentration of poison in different parts of the reactor, it is possible to change the power density distribution from the undesirably nonuniform cos J0 distribution to a distribution in which more of the reactor operates at the maximum permissible power density. […]

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2.2 Batch Decay Batch decay is concerned with the radioactive decay of a given amount of initially pure parent material. The decay products will build up and, if radioactive, will later die away as time progresses. An example is the decay chain resulting from the radioactive disintegration of 211 Pb, which is itself a member of the radioactive decay scheme […]

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Figure 3.34 shows the quantities of materials to be supplied or processed for a 1000-MWe LMFBR having the characteristics of the Atomics International “fdllow-on” design [B3]. Because the LMFBR can be designed for a wide range of fuel-cycle conditions, the particular ones shown in this figure-are’only one example of how it is thought this type of reactor might perform when […]

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When nuclei of certain light elements have speeds corresponding to temperatures of the order of tens of millions of degrees, they occasionally fuse together to form heavier elements with the concurrent release of large amounts of energy. These are the reactions from which the energy radiated by the sun and the stars is derived. The intense gravitational attraction in the […]

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