A positive reactivity was added to a critical reactor operating at a certain steady power level. The
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A positive reactivity was added to a critical reactor operating at a certain steady power level. The reactor power increased by \(20 \%\) in \(100 \mathrm{~s}\). Use the delayed neutron data given in Table 10.6 and find the amount of reactivity inserted.
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TABLE 10.6 Delayed neutron data for 235U. Delayed Decay Delayed neutron Delayed Decay Delayed neutron neutron group constant (2) fraction (BB) neutron group constant (A) fraction (BB) (s) Va=0.01673 (S-1) Va=0.01673 =0.0064 =0.0064 1 0.0127 0.038 4 0.311 0.407 2 0.0317 0.213 5 1.40 0.128 3 0.115 0.188 6 3.87 0.026
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