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Title: Results of an Analysis of Field Studies of the Intrinsic Dynamic Characteristics Important for the Safety of Nuclear Power Plant Equipment

A classification of the equipment important for the safety of nuclear power plants is proposed in terms of its dynamic behavior under seismic loading. An extended bank of data from dynamic tests over the entire range of thermal and mechanical equipment in generating units with VVER-1000 and RBMK-1000 reactors is analyzed. Results are presented from a study of the statistical behavior of the distribution of vibrational frequencies and damping decrements with the “small perturbation” factor that affects the measured damping decrements taken into account. A need to adjust the regulatory specifications for choosing the values of the damping decrements with specified inertial loads on equipment owing to seismic effects during design calculations is identified. Minimum values of the decrements are determined and proposed for all types of equipment as functions of the directions and natural vibration frequencies of the dynamic interactions to be adopted as conservative standard values in the absence of actual experimental data in the course of design studies of seismic resistance.
Authors:
; ;  [1]
  1. JSC “Atoménergo” (Russian Federation)
Publication Date:
OSTI Identifier:
22470088
Resource Type:
Journal Article
Resource Relation:
Journal Name: Power Technology and Engineering (Print); Journal Volume: 48; Journal Issue: 5; Other Information: Copyright (c) 2015 Springer Science+Business Media New York; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; DAMPING; DISTURBANCES; LENINGRAD-1 REACTOR; LOADING; NUCLEAR POWER PLANTS; REACTOR SAFETY; SEISMIC EFFECTS; SPECIFICATIONS; WWER TYPE REACTORS