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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
Appendix E
OUTLINE OF STEPS TO DEVELOP PSEUDO-MEAN CORRECTION FACTOR
Development of Pseudo-Mean Correction Factor Following A. Cornell Approach for
Peak Acceleration. LLNL 5 represents LLNL hazards results with LLNL-AE5 while
LLNL 4 represents LLNL hazard results without LLNL-AE5.
1.
Ratio of 85th/median at .2g
EPRI = 3.34
LLNL 5 - 11.17
LLNL 4 = 7.18
From Figure C1 and McGuire (geometric mean of 85th/median ratio from reactor
sites) and from Figures C7 - C9.
at .1g
EPRI - 2.99
LLNL 5 = 10.82
LLNL 4 = 6.84
at .4g
EPRI = 4.55
LLNL 4 = 13.38
LLNL 4 = 8.58
2.
Take Geometric Average of the above ratios
EPRI/LLNL5 Ratio = (3.34 * 11.17) = 6.11
at .2g
7.18) = 4.90
EPRI/LLNL4 Ratio = (3.34 *
EPRI/LLNL5 Ratio = (2.99 * 10.82) = 5.69
at .1g
6.84) = 4.52
EPRI/LLNL4 Ratio = (2.99 *
EPRI/LLNL5 Ratio = (4.55 * 13.38) = 7.80
at .4g
8.58) = 6.25
EPRI/LLNL4 Ratio = (4.55 *
These are composite LLNL/EPRI 85th/median ratios.
From Cornell if x = 85th/median ratio then mean/median = e (ln x)**2
3.
x
mean/median
at .2g
EPRI/LLNL 5
6.11
5.14
EPRI/LLNL 4
4.90
3.54
at .1g
EPRI/LLNL 5
5.69
4.53
EPRI/LLNL 4
4.52
3.12
at .4g
EPRI/LLNL 5
7.80
8.25
EPRI/LLNL 4
6.25
5.36
E-1
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