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Unformatted text preview: 25. Let P0 be the initial power output, P be the ﬁnal power output, k be the multiplication factor, t be the
time for the power reduction, and tgen be the neutron generation time. Then, according to the result of
Problem 22,
P = P0 k t/tgen .
We divide by P0 , take the natural logarithm of both sides of the equation and solve for ln k :
ln k = tgen
1.3 × 10−3 s
P
350 MW
=
ln
ln
= −0.0006161 .
t
P0
2.6 s
1200 MW Hence, k = e−0.0006161 = 0.99938. ...
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics, Power, Neutron

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