Nuclear Seismic Qualification: instrumentation_control_panel
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 |
|---|---|---|---|---|---|---|---|---|---|
| instrumentation_control_panel | fragility_median_capacity_Am_g | Median seismic capacity for I&C panels, control boards, and annunciator panels. | Failure modes: relay chatter, instrument calibration shift, connection failure. Sensitive instruments may lose calibration at lower levels than structural failure. | g | 2.5 | 0.5 | 1 | fragility_analysis | Class_1E_Seismic_Category_I |
| instrumentation_control_panel | hclpf_capacity_g | HCLPF for I&C panels. Often lower than switchgear due to sensitive analog instruments. | Conservative for old-design analog systems; modern digital I&C systems may be more robust structurally but require separate software qualification. | g | 1.2 | 0.25 | 0.55 | fragility_analysis | Class_1E_Seismic_Category_I |
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