ASME QME-1-2017 pdf download

ASME QME-1-2017 pdf download.Qualification of Active Mechanical Equipment Used in Nuclear Facilities.
assembly: two or more connected components that may be qualified as a unit. attachment: an item that is appended to a device, compo- nent, or assembly. broadband response spectrum: a response spectrum that describes motion in which amplified response occurs over a wide (broad) range of frequencies. coherence: the coherence function defines a comparative relationship between two time histories. It provides a statistical estimate ofhow much two motions are related as a function of frequency. The numerical range is from 0, for unrelated, to 1, for perfectly correlated motions. correlation coefficient: the correlation coefficient function defines a comparative relationship between two time histories. It provides a statistical estimate of how much two motions are related as a function of time delay. The numerical range is from 0, for unrelated, to 1, for related motions. cutofffrequency: the frequency in the response spectrum where the zero period acceleration (ZPA) asymptote essentially begins. This is the frequency beyond which the single-degree-of-freedom oscillators exhibit very lit- tle or no amplification ofmotion and indicates the upper limit of the frequency content of the waveform being analyzed. cycle: one complete sequence of values of an alternating quantity. damping: a generic name ascribed to the energy dissipa- tionmechanisms orsmall,otherwiseunrepresentednon- linearities that reduce the amplification and broaden the vibratory response in the region of resonance. One- hundred percent critical damping is defined as the least amount of equivalent viscous damping that causes a single-degree-of-freedom system to return to its original position without oscillation after initial disturbance. device: an item that is used in connection with, or as an auxiliary to, other items of equipment on which it may be mounted. earthquake experience spectrum (EES): the earthquake- based response spectrum that defines the seismic capac- ity of a reference equipment class. effective mass: the mass of the structure or equipment that participates in determining the dynamic response of the structure or equipment. effective mass ratio: the ratio of the effective mass consid- ered in the response to the total effective mass for the equipment or structure. equivalent static load: anequivalentstatically applied load or acceleration based on a function of the peak of the applicable response spectrum that may be used as an alternative to response spectrum or time history to define seismic input for design of active mechanical equipment. 11 flexible equipment: active mechanical equipment includ- ing the effects of the active mechanical equipment sup- ports whose lowest natural frequency is less than the frequency value at the start of the ZPA or the cutoff frequency of the applicable response spectrum. foundation: the structure that supports or otherwise pro- vides restraint to active mechanical equipment and buildings. Fourier spectrum: the Fourier spectrum is a complex val- ued function that provides amplitude and phase infor- mation as a function of frequency for a time domain waveform. fragility: susceptibility of active mechanical equipment to malfunction as a result of structural or operational limitations or both when subjected to dynamic excitation. fragility level: the highest level of excitation parameters thatequipmentcan withstand and still perform the spec- ified functions (note that the fragility level may include the interdependence of amplitude, frequency, and time). ground acceleration: the acceleration time history of the ground resulting from the motion ofa given earthquake. Themaximumamplitude ground accelerationis the ZPA of the ground response spectrum. inclusion rules: the physical and operational characteris- tics that define an acceptable range of equipment physi- cal characteristics, dynamic characteristics, and functions for ensuring seismic ruggedness and defining the bounds of active mechanical equipment included in a reference equipment class (see para. QR-A-7421). independent items: items of equipment that have different physical characteristics or experience different seismic motion characteristics, e.g., different earthquakes, sites, buildings, or orientations/locations in the same building. in-line active mechanical equipment: active mechanical equipment whose loads are caused by the distribution system in which it is installed. load path: structural path necessary to transmit the seis- mic forces from the active mechanical equipment centers of mass through to the anchorage. low-cycle fatigue: a progressive fracture or cumulative fatigue damage of the material that may be inflicted by fewer than1,000 cycles ofload because oflocalized stress concentration at high strains under fluctuating loads. mass ratio: the ratio of the active mechanical equipment mass (secondary) to the building mass (primary) partici- pating in the response.