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Page Title:
Table 2-1 Seismic Performance Categories and Seismic Hazard Exceedance Levels |
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|  DOE-STD-1020-2002
Table 2-1 Seismic Performance Categories and Seismic Hazard Exceedance Levels
Performance
Mean Seismic Hazard
Remarks
Category
Exceedance Levels, PH
0
No Requirements
Use IBC 2000
1
Seismic Use Group I Criteria-2/3
Follow IBC 2000 in its
Entirety*
MCE Ground Motion
2
Use IBC 2000 Seismic Use Group
Follow IBC 2000 in its
Entirety*
III Criteria 2/3 MCE Ground Motion
with Importance Factor of 1.5
4x10-4
3
Establish DBE Per DOE-STD-1023
(1x10-3 ) 1
Analysis Per DOE-Std. 1020
Establish DBE Per DOE-STD-1023
4
1x10-4
Analysis Per DOE-Std. 1020
1
-4)
(2x10
*
Based on Maximum Considered Earthquake (MCE) Ground Motion generally 2%
Exceedance Probability in 50 years from the seismic hazard maps, modified to account for site
effects. PH = 4x10-4
1
For sites such as LLNL, SNL-Livermore, SLAC, LBNL, and ETEC, which are near tectonic
plate boundaries.
Performance Category 2 and lower SSCs may be designed or evaluated using the
approaches specified in IBC 2000 seismic provisions. Common cause effects and interaction
effects per DOE- STD-1021 should be taken into account. However, for Performance Category
3 or higher, the seismic evaluation must be performed by a dynamic analysis approach. A
dynamic analysis approach requires that:
1.
The input to the SSC model be defined by either a design response
spectrum, or a compatible time history input motion.
2.
The important natural frequencies of the SSC be estimated, or the peak of
the design response spectrum be used as input. Multi-mode effects must
be considered.
2-4
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