The article is about nuclear power plant (NPP) safety analysis in case of aircraft crash. Specifically, the article considers the following problems: inclusion of aircraft crash into NPP design bases regarding calculation of frequency of an aircraft crash into NPP; aspects of justification of loads on NPP structures, systems and components (SSCs) caused by mechanical action of a primary missile – aircraft fuselage impact. Probabilistic characteristics of such random parameters as frequency of aircraft crash and direction of aircraft trajectory are determined by the results of analysis of world statistics of aviation accidents. Method of calculation of aircraft crash frequency on structures, buildings and NPP as a whole is presented. It takes into account options of accidental and intentional aircraft crashes and various aircraft approach scenarios. 
Procedure of probabilistic justification of loads on civil structures under aircraft impact is described. The loads are specified so as not to exceed allowable value of failure probability of NPP as a whole. Calculation of failure frequency of civil structures of existing NPP is given as an example to show analysis in case of a crash of an aircraft heavier than considered in NPP design. Procedure of probabilistic justification of dynamic loads on NPP equipment in case of aircraft impact is described. Method of floor response spectra (FRS) calculation with the required non-exceedance probability is given. Probabilistically justified loads in case of intentional aircraft impact (act of terrorism) are also considered. Additionally it is presented how internal forces calculated with the use of FRS with the required non-exceedance probability can be summed to provide analysis of subsystems.

The article is devoted to the determination of the probability characteristics of the parameters that are necessary for the safety analysis of nuclear power plant (NPP) when airplane falls on it. Probability distribution (probability density and cumulative function) of an aircraft trajectory angle with the vertical was found via processing of the world statistics of aircraft accidents. Recurrence of aircraft falls within the bounds of standard area was obtained by means of analysis of aircraft accident protocols with airplanes of general aviation in the United States. These data can be used when designing of NPPs in Russia.

The article is devoted to determination of probability of aircraft fall on nuclear power plant (NPP). Probability distribution of aircraft trajectory angle based on aircraft accidents statistics is used. Equiprobable aircraft approach from any direction is supposed. Probability distribution of impact to a building structure under an arbitrary angle to its normal was determined. Probability of impact to building structures of various shapes (typical for NPPs) was calculated. An example of calculation of the aircraft fall probability on NPP is given. The procedure for determination of the impact probability to building structures at intentional aircraft crash (act of terrorism) was assumed.

The paper concerns the problems of determining the probability of an aircraft crash on a nuclear power plant (NPP), located in the vicinity of the flight line. In this case only one preferred direction from which the aircraft approach to NPP is considered. Probability distribution of the aircraft angle of arrival due to aircraft accident statistics and probability of flight line deviation angle are used. The probability distribution law of impacts was determined for various angles between the flight line and the structure normal. Probability of impact to building structures of various shapes (typical for NPPs) was calculated. Example of calculating the probability of an aircraft crash on NPP located in the vicinity of the flight line is given.