Table 3,
Estimates of 239°240py Inventory in Surface Soil (0-5 cm) in Area 13 (Project 57) Using Two-Stage Kriging and Average
239°240p, Concentrations for Strata.
Number
of Samples
Size of
Part
Strata
Strata
(m”)
|
Number of
100- x 100-Frt.
(n)
Cells* (v)
|
Estimated Inventory
x
I
UsingKriging
_
(Curies)
-
-
100(SE/1)
i
2.0
3.7
2.3
8.5
16.5
0.37
0.61
0.37
0.91
1.2
18%
16%
164
11%
7%
2.5
4.0
2.0
19**
27
0.46
0.64
0.36
7.2
7.2
18%
16%
18%
39%
27%
7.0
0.77
11%
9.9
1.0,
10%
~
66€
A
(2 Cells Near
GZ Not
Deleted)
3
4
5
6
Total
108 , 000
74,000
19,000
24,000
225,000
14
18
20
AT
99
6
_ 22,140
44
116
80
20
26
242
-
ne
UsingStrataMeans _.
SE
SE
100(SE/1),
4
|ff
B
(2 Gells Near
GZ Deleted)
Total
223,140
24
96
ee
240
=
15
1.1
7.4%
i
.
18
-
1.3
7.1%
i
*One cell equals 929 m,
**kThis estimate is one curie less than reported by Gilbert
stored library samples collected in stratum 6.
rs
(1977).
This results from the analysis of a new 10g aliquot from three
These new Pu values were also used in obtaining the kriging results.
Obtained using standard stratified random sampling theory.
Note that the relatively low value of 1.3 in Part B versus 7.2 in Part A
does not necessarily imply the estimate of inventory in Part B is closer to the true inventory than that in Part A.
The deletion
of the three high Pu concentrations have simply reduced the estimated standard deviation in stratum 6 from 2,043 to 300 uCi/m?.
|
i
|
{
|
i
: