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keff -1Akeff
keff
keff
Problem #9
Calculate the number of neutrons present after 200 generations for a critical reactor, a
reactor with keff = 0.990, and a reactor with keff = 1.0001 assuming 5 * 1012 neutrons
present at time 0. What is the reactivity in each cases in Ak/k and in pem?
are
cm3
a) Critical reactor: keff =
b) Subcritical reactor: keff
c) Supercritical reactor: keff =

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