SUR26.0626.0618.1 sec1.44 DPM¯effeff0.0068( 0.00130)0.05 sec1 ( 0.00130)124.6 secSUR26.0626.06124.6 sec0.2091 DPMPPoet /100 W e(120 s/124.6 s)38.2 WPPo10SUR (t)(100 W) 10(0.2091 DPM) (2 min)38.2 WReactor Theory (Reactor Operations)DOE-HDBK-1019/2-93REACTOR KINETICSRev. 0NP-04Page 19Step 3:The startup rate can be calculated from the reactor period using Equation (4-11).Example 2:130 pcm of negative reactivity is added to a reactor that is initially critical at a power of100 watts. for the reactor is 0.05 sec and the effective delayed neutron fraction iseff-10.0068. Calculate the steady state period and startup rate. Also calculate the powerlevel 2 minutes after the reactivity insertion.Solution:Step 1:Use Equation (4-9) to calculate the reactor period.Step 2:The startup rate can be calculated from the reactor period using Equation (4-11).Step 3:Use either Equation (4-1) or Equation (4-10) to calculate the reactorpower two minutes after the reactivity insertion.
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