Environmental Engineering Reference
In-Depth Information
1.0
633°K Autoclave
#1
#2
#3
#4
#5
0.9
0.8
0.7
0.6
EPRI STD
0.5
0.4
0.3
0.2
0.1
0
0
0.1
0.2
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0.4
0.5 0.6 0.7
Time, days (thousands)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
4.42 Corrosion weight gain as a function of laboratory autoclave
test exposure time for several Zircaloy-4 tube variants. (Source:
Reprinted, with permission, from Garde et al . (1994), copyright ASTM
International, 100 Barr Harbor Drive, West Conshohocken, PA 19428.)
Enhanced shadow
corrosion
￿ ￿ ￿ ￿ ￿ ￿
Shadow corrosion
Late increased
corrosion
Nodular corrosion
Uniform corrosion
0
10
20
30
40
50
60
FA burnup (MWd/kgU)
4.43 Characteristics of different types of corrosion observed in BWRs.
Oxide layer thickness in arbitrary units versus fuel assembly burnup.
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