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126
Table 9.4, Fission Product Deposition on MSRE Graphite After 7800 and 24,000 Mwhr
Fission Product (dis min-' cm--2)s
....
. ~ . ............ . ..
Graphite 1.02-year
Location
67-hr 99b10 78-hr I3*Tc
~. __-__
39.7-day '03Ru
. 1OtjRu
~
35-day 9sNb 65-day 9sZr
................. ____
Ab Bb A B A B
~
A B A R A B
x 10'0 x 10'0 x 10'0 x 10'O x 10'0 x 10'0 x 10'0 Y 10'0 x 1010 x 10'0 x 10'0
'TOP 3.97 3.69 3.22 2.12 0.83 0.91 0.003 0.46 6.2 0.0004 0.001
Middle 5.14 4.79 3.26 3.82 0.75 1.19 0.006 2.28 1.17 0.003 0.007
Bottom 3.42 4.39 2.78 2.66 0.48 1.10 0.005 2.40 17.4 0.002 0.02
I__....._......... . . . . . . .
aMean values for all four faces.
bA: value obtained after 7800 Mwiir; R: value obtained after 24,000 Mwhr.
Table 9.5. Uranium in Millings from Top Graphite Bur in MSRE After 24,000 Mwhr
Sample Sample
Location Number
Side 1 1
(facing salt) 5
7
9
11
13
17
21
25
26
27
89
Side 2 2
(facing salt) 6
8
10
12
14
Blank
18
22
Side 3 3
(facing 15
graphite) 19
23
aQuestionable value.
Cumulative
Depth
(mils)
1.56
4.04
5.51
7. 50
10.75
13.60
17.10
21.75
25.61
30.57
36.58
48.18
5.58
8.60
11.84
14.03
16.62
24.44
31.90
40.94
5. so
8.79
12.98
18.56
~
.....
.....
Specimen 23SU 235u
Weight Analysis in Specimen
( 9) (ppm) (peg)
0.145
0.224
0.132
0.172
0.295
0.256
0.340
0.390
0.350
0.445
0.540
1.05
0.360
0.190
0.210
0.140
0.165
0. 500
0.480
0.580
0.495
0.300
0.470
0.505
9
2. 1
2.4
0.80
0.03a
0.72
0.48
0.29
0.49
0.39
0.28
0.15
8.8
3.0
3.6
2.6
1.4
1.6
0.28
0.99
1.33
6.7
1.2
0.84
0.78
1.3
0.47
0.32
0.13
0.009=
0.19
0.16
0.11
0.17
0.017
0.15
0.15
3.2
0.57
0.76
0.36
0.23
0.80
0.48
0.77
3.3
0.36
0.39
0.39