Reactor Startup Rate (SUR) - h1019v2_110
Home
Download PDF
Order CD-ROM
Order in Print
Reactor Startup Rate (SUR) - h1019v2_109
Reactor Startup Rate (SUR) - h1019v2_111
Nuclear Physics and Reactor Theory Volume 2 of 2
Page Navigation
86
87
88
89
90
91
92
93
94
95
96
P
P
_{o}
2
^{t /DT}
k
_{eff}
1
k
_{eff}
1.0025
1
1.0025
0.00249
k/k
¯
eff
eff
0.0070
0.00249
0.10 sec
^{1}
0.00249
18.1 sec
REACTOR KINETICS
DOE-HDBK-1019/2-93
Reactor Theory (
Reactor Operations
)
NP-04
Rev. 0
Page 18
Doubling time (DT) = (ln 2)
where:
= stable reactor period
ln 2
= natural logarithm of 2
When the doubling time is known, the power level change from P is given by the following
o
equation.
(4-12)
where:
t
= time interval of transient
DT
= doubling time
The following
example problems
reinforce the concepts of period and startup rate.
Example 1:
A reactor has a
of 0.10 sec and an effective delayed
neutron
fraction of 0.0070. If
eff
-1
k is equal to 1.0025, what is the stable
reactor period
and the SUR?
eff
Solution:
Step 1:
First solve for
reactivity
using Equation (3-5).
Step 2:
Use this value of reactivity in Equation (4-9) to calculate
reactor period
.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business