Probabilistic Assessment of NPP Building Vibrations Caused by Aircraft Impact

摘要

An accidental aircraft impact on the NPP building causes its forced vibrations and dynamic loads on the equipmentrnlocated within it. Their intensity depends on the aircraft class, mass and velocity, load vector direction in space, and also onrnthe distance between the place of impact and the location point of the equipment item under consideration. All these parametersrnare random ones, therefore dynamic loads on the equipment are also random quantities.rnThe methodology of floor response spectra (FRS) development with various probabilities of exceedence is described inrnthe report. All random parameters mentioned above are considered. Examples of FRS calculations are given. They showrnthat FRS ensuring even very small probability of exceedence is significantly lower than FRS for the most unfavorable case.rnThe methodology can be used both when designing new NPPs, and when the analysing the safety of the existing ones.