Szukana fraza: [Abstrakt = "Over 449 nuclear reactors have been operating in the world in 2017. More than 60% of them were the pressurized water reactors. One from the most modern reactors of this type is the AP1000 reactor, developed by Westinghouse. The mentioned construction is also taken into account in terms of the construction of the first nuclear power plant in Poland, for both economic and technical reasons as well as very well developed safety systems. In the following work, apart from the presentation of the AP1000 reactor technology system, the model of reactor core was presented. Above\-mentioned model allows, among other things, to investigate the impact of fuel assemblies on the neutron multiplication factor\/reactivity, determination of neutron flux density in the core or level of fuel burnout. The obtained results were analyzed and referenced to the literature data in order to verify created model."]

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