Environmental Engineering Reference
In-Depth Information
(
)
(
)
(
) =
q
q
q
q
+
1
O
=
α
KR
−
R S
α
K S R
−
R
.
(10.9)
1
2
2
2
.
For.the.substitution.as.follows:
(
)
q
q
+1
t
=
R
−
R
.
(10.10)
.
q
O
=
α
K S t
⋅
⋅
.
(10.11)
.
2
2
(
(
)
)
q
−1
q
dt
=
qR
−
q
+
1
R dR
.
(10.12)
.
For.the.derivative:
dQ
dS
dQ
dt
dt
dR
2
2
= =
0
·
(
)
(
)
q
q
−
1
q
=
α
K S qR
⋅
⋅
−
q
+
1
R
.
(10.13)
2
(
)
(
)
q
q
−
1
=
α 2
K S R
⋅
⋅
q
−
q
+
1
R
.
Therefore,
(
(
)
) =
q
−
q
+
R
0 .
(10.14)
1
.
(
)
q
=
q
+
1
R
.
(10.15)
.
R
R
q
=
.
(10.16)
1
−
.
1
2
3
using.
= + +
x x x
+
+
,.for. x 〈1
1
−
x
1
Therefore
.
(
) = ⋅
Lifetime
Refueling period
(
)
(
) =
q
q
q
q
+
1
O
=
α
KR
1
−
R S
α
K S R
−
R
Z
(10.17)
2
2
2
.
where
Z .is.the.total.power.in.the.period.of.interest.
Lifetime.is.the.total.operation.period,.60.years.
Refueling.period is.the.refueling.period,.every.18.months.
 
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