NC0005363_Table 6-7 Input Parameters and values for Convective-Dispersive Flow Equation_20160201

TABLE 6-7
INPUT PARAMETERS AND VALUES FOR CONVECTIVE -DISPERSIVE FLOW
EQUATION BASED UPON WEATHERSPOON DATA
W.H. WEATHERSPOON POWER PLANT
DUKE ENERGY PROGRESS, LLC, LUMBERTON, NC
Parameter
Nomenclature
Value
Source of Value
Began Sluicing Ash
-
1949
CSA
Ceased Sluicing
-
2011
CSA
Duration of Source Term
t°
63 years
Calculated
Source Concentration
2725 boron;
Mean values from CAP Part 1,
(Ng/L)
c0
686 arsenic
Table 1-1
Background
cl
87 boron;
CAP Part 1, Table 2-9
Concentration (Ng/L)
10 arsenic
Hydraulic Conductivity
k
520
Geomean of surficial k
(ft/yr)
CAP Part 1, Table 3-2
Hydraulic Gradient
i
0.009
Average of gradients unaffected by
basin mound CAP Part 1, Table 3-3
Effective Porosity
ne
0.378
CSA
Seepage Velocity (ft/yr)
vs=ki/ne
12
Calculated
Dispersivity (ft)
a
20
1/100- 2000
Dispersion (ft2/yr)
D = ovs
244
Calculated
Distribution Coefficient
Kd
1, 2, 4 for boron;
Falta et al. (2015) used 4; 1 and 2
(ml/g)
45 for arsenic
were added for comparison only
Time from Introduction of
t
Varies
To capture the length of plume
Constituent (yrs)
Distance from Ash Basin
Boundary to Cooling Pond
x
400
Measured
(feet)
Calculated Concentration
c(x,t)
As shown
Calculated
(Ng/L)
Prepared By: KDB Checked By: DGN
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