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Fundamentals of 3-D Neutron Kinetics and Current Status

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Figure 1. Deviation of the fuel element reactivity along  burnup at several off-nominal history conditions of water  density, fuel temperature and Boron; without spectral history  treatment
Figure 3.  Evolution with burnup of the mean neutron generation time (left) and the effective delayed neutron  fraction (right) for a typical PWR fuel assembly
Figure 4.  Reactivity decrease (pcm) by net absorption  due to decay of extra  149 Pm (only via  147 Pm),  148 Pm and  148m Pm after shutdown from several power levels
Figure 5.  Horizontal (left) and vertical (right) sections of core (with fuel elements, nodes and grids), shroud, barrel,  vessel, calorifuge, excore detector (lower section), reactor well and wall
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