Nuclear Seismic Qualification: valve_active
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 |
|---|---|---|---|---|---|---|---|---|---|
| valve_active | fragility_median_capacity_Am_g | Median seismic capacity for motor-operated valves (MOVs) and solenoid valves. | Valves are mechanically simple; high structural capacity. Actuator and position switch may govern. MOVs typically very robust. | g | 6 | 1 | 2.5 | fragility_analysis | Class_1E_Seismic_Category_I |
| valve_active | hclpf_capacity_g | HCLPF for safety-related active valves. Generally high due to simple robust construction. | Actuator failure modes evaluated separately; solenoid valves may have lower fragility than motor-operated valves. | g | 3 | 0.5 | 1.2 | fragility_analysis | Class_1E_Seismic_Category_I |
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