Seismic capacity of switchgear
As part of a component fragility program sponsored by the USNRC, BNL has collected existing information on the seismic capacity of switchgear assemblies from major manufacturers. Existing seismic test data for both low and medium voltage switchgear assemblies have been evaluated and the generic results are presented in this paper. The failure modes are identified and the corresponding generic lower bound capacity levels are established. The test response spectra have been used as a measure of the test vibration input. The results indicate that relays chatter at a very low input level at the base of the switchgear cabinet. This change of state of devices including relays have been observed. Breaker tripping occurs at a higher vibration level. Although the structural failure of internal elements have been noticed, the overall switchgear cabinet structure withstands a high vibration level. 5 refs., 2 figs., 2 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6104309
- Report Number(s):
- BNL-NUREG-42704; CONF-890721-33; ON: DE89013223; TRN: 89-016442
- Resource Relation:
- Conference: Joint ASME/JSME pressure vessel and piping conference, Honolulu, HI, USA, 23 Jul 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRICAL EQUIPMENT
SEISMIC EFFECTS
NUCLEAR POWER PLANTS
CIRCUIT BREAKERS
DATA BASE MANAGEMENT
FAILURES
PROBABILISTIC ESTIMATION
REACTOR SAFETY
RELAYS
RELIABILITY
SWITCHES
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
MANAGEMENT
NUCLEAR FACILITIES
POWER PLANTS
SAFETY
THERMAL POWER PLANTS
220900* - Nuclear Reactor Technology- Reactor Safety
220200 - Nuclear Reactor Technology- Components & Accessories