Nuclear Seismic Qualification: class_1e_passive_structural
Seismic qualification requirements for nuclear power plant safety-related equipment per IEEE 344-2013, NRC Regulatory Guide 1.100 Rev.4, and NRC RG 1.60/1.61. Covers equipment seismic categories (Class 1E, Category I/II, non-seismic), test levels (OBE/SSE in g), Required Response Spectra (RRS) frequency ranges, damping ratios, fragility parameters (median capacity Am, randomness beta_R, uncertainty beta_U, HCLPF) by equipment class (switchgear, MCC, I&C panels, diesel generators, pumps, valves, piping, tanks), and anchorage design requirements.
| equipment category | qualification parameter | description | notes | parameter unit | parameter value max | parameter value min | parameter value typical | qualification method | seismic category |
|---|---|---|---|---|---|---|---|---|---|
| class_1e_passive_structural | static_coefficient_obe_g | Equivalent static seismic coefficient for OBE qualification of passive equipment by static analysis. | Static coefficient = peak floor acceleration x 1.5 dynamic amplification factor for equipment resonance in uncoupled analysis. | g | 0.25 | 0.1 | 0.15 | analysis | Class_1E_Seismic_Category_I |
| class_1e_passive_structural | static_coefficient_sse_g | Equivalent static seismic coefficient for SSE qualification of passive equipment. | Used for simple structures and anchorage design when dynamic analysis not warranted. | g | 0.5 | 0.15 | 0.3 | analysis | Class_1E_Seismic_Category_I |
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