CSA N289.4-12 pdf download – Testing procedures for seismic qualification of nuclear power plant structures, systems, and components.
2 Reference publications This publication refers to the following, and the year dates shown indicate the latest issues available at the time of printing: CSA Group N286-05 (R201 1 ) Management system requirements for nuclear power plants N289 series of Standards N289.1 -08 General requirements for seismic design and qualification of CANDU nuclear power plants N289.2-1 0 Ground motion determination for seismic qualification of nuclear power plants N289.3-1 0 Design procedures for seismic qualification of nuclear power plants N289.5-1 2 Seismic instrumentation requirements for nuclear power plants and nuclear facilities N290.1 3-05 (R201 0) Environmental qualification of equipment for CANDU nuclear power plants ASME (American Society of Mechanical Engineers) ASME QME-1 -07 Qualification of Active Mechanical Equipment Used in Nuclear Power Plants EPRI (Electrical Power Research Institute) NP-6041 -88 A Methodology for Assessment of Nuclear Power Plant Seismic Margin NP-7484-93 Guideline for the Seismic Technical Evaluation of Replacement Items for Nuclear Power Plants TR-1 04871 -95 Generic Seismic Technical Evaluations of Replacement Items for Nuclear Power Plants TR-1 05849-08 Generic Seismic Technical Evaluations of Replacement Items for Nuclear Power Plants — Item-Specific Evaluations IEEE (Institute of Electrical and Electronics Engineers) 344-04 IEEE Recommended Practice for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations 382-06 IEEE Standard for Qualification of Safety-Related Actuators for Nuclear Power Generating Stations
3 Definitions and abbreviations 3.1 Definitions The following definitions shall apply in this Standard: Acceleration — the most common parameter for categorizing seismic motion; it is usually expressed in mm/s 2 , gals (cm/s 2 ) or “g” units. Note: By international agreement, the value of g is 9806.65 mm/s 2 . Anomaly — any deviation or malfunction from acceptable or expected functionality of the test specimen. Note: Examples of anomalies include failure of mounting, dislodging of sub-components, premature interruptions during testing, or incomplete compliance with the test specification. Authority having jurisdiction (AHJ) — the regulatory organization, office, or agency responsible for approving or accepting design, equipment, materials, installation, or procedures according to applicable codes and standards. Critical damping coefficient — the minimum value of damping that will allow a displaced oscillator to return to its initial position without oscillation. Damping ratio (b) — the ratio of the damping coefficient to the critical damping coefficient for a single-degree-of-freedom oscillator or a normal mode of vibration. Degrees-of-freedom (DOF) — the number of independent coordinates required to define the position of all parts of a system at any instant of time. Design basis earthquake (DBE) — an engineering representation of potentially severe effects at the site due to earthquake ground motions having a selected probability of exceedance of 1 × 1 0 –4 per year, or such a probability level as is acceptable to the authority having jurisdiction.
Notes: (1) DBE ground motions are usually referred to as an “earthquake”, and can take the form of a response spectrum, or time-history of acceleration, velocity, or displacement. (2) The DBE is used for the seismic qualification of certain SSCs. It is used as an input for nuclear power plant seismic design, analysis, and testing to produce a design that is adequate to mitigate the specified seismic hazard. (3) The DBE for some older plants was based on an estimated probability of exceedance of 1 × 10 –3 per year or was established deterministically (i.e., without probabilistic measures). Design basis seismic ground motion (DBSGM) — the seismic ground motion at the site that (a) represents the potentially severe effects of earthquakes in the region; and (b) has a sufficiently low probability of being exceeded during the lifetime of the plant that, when considered in relation to other engineering design margins, it provides adequate assurance against an earthquake-induced failure. Design floor response spectrum — the response spectrum developed for the design of equipment and components that are subjected to the motion of a particular floor (elevation) in a structure or a system when the structure or system is subjected to the applicable level of earthquake as defined in the test specification. Design ground response spectrum — the response spectrum developed from the design basis seismic ground motion (DBSGM) or site design seismic ground motion (SDSGM). Device — an assembly of interconnected electrical and/or mechanical parts constituting an identifiable instrument, that is used with, or as an auxiliary to, other equipment.CSA N289.4-12 pdf download.
