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Page Title:
Appendix E: Outline of Steps to Develop PSEUDO-Mean Correction Factor - Continued |
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|  DOE-STD-1024-92
7.
Take b's from #6 and plug into equation in #4 using the mean/median hazard
ratios in #3.
from #3
A4/A3
A5/A4
A4/A3
A5/A4
mean/median
GMI
"b"
"b"
GMI
hazard
at .2g
EPRI/LLNL5
5.14
2.58
1.93
1.89
2.34
EPRI/LLNL4
3.54
2.58
1.93
1.63
1.93
at .1g
EPRI/LLNL5
4.53
2.58
1.93
1.80
2.19
EPRI/LLNL4
3.12
2.58
1.93
1.55
1.80
at .4g
EPRI/LLNL5
8.25
2.58
1.93
2.26
2.98
EPRI/LLNL4
5.36
2.58
1.93
1.92
2.39
where GMr = ground motion ratio (#4)
8.
Cross-complete ground motion ratios to UCRL-15910 (DOE-STD-1020) Hazard
Exceedance Prob. & Perf. Prob.
ProbH = 10-3
ProbP = 5 x 10-4
Low Haz.
(PC-2)
ProbH = 10-3
ProbP = 10-4
Mod. Haz.
(PC-3)
ProbH = 2 x 10-4
ProbP = 10-5
High Haz.
(PC-4)
Low and moderate should be based on A4/A3. High should be based on A5/A4.
= hazard
H
= performance
P
What ground motion levels should correction be based on? What median
9.
levels of ground motion represent DOE sites at above prob.
SEE TABLE 2
at 10-2 median ranges from 0.03 to .10g.
at 2 x 10-4 median ranges from 0.07 to .22g.
Note trend from #7 the lower the "g" value the smaller ground motion ratio.
E-4
E-3
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