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3. Impact of Pu on reactor characteristics
3.1 Impact on thermal neutron reactors
As we saw earlier, the use of MOX in a thermal neutron reactor tends to increase the absorption rate in the thermal zone, leading to a lower heat flux. This is known as spectrum hardening.
The consequences are manifold .
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This reduces the effectiveness of the control clusters and soluble boron used in PWRs to control excess reactivity at the start of the cycle.
The drop in available anti-reactivity reduces the margins on safety...
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Impact of Pu on reactor characteristics
MOX fuel behavior in the reactor
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