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2 Modern Engineering

2 2020

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Overview of the safety systems used in generation III and III+ of reactors

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Stępień M. , Niewiński G. , Kaszko A.

Modern Engineering

2020

tom 3

92--99

Generation III and III+ of nuclear reactors are most often operated in the world. Reactor safety issues are the most important part of designing nuclear power plants. This article presents the current accident protection systems in power plants. Among other things, the so-called "defense in depth" was presented, which minimizes the risk of the spread of nuclear fission products and the associated passive safety and reactor protection systems.

Probabilistic Safety Assessment of ESBWR gravity driven cooling system

100%

Kaszko A. , Niewiński G. , Stępień M.

Modern Engineering

2020

tom 1

18--25

According to Polish nuclear law, newly emerging nuclear facilities require probabilistic safety assessment (PSA). This article is intended to present the PSA method and to present the error tree method by which the probability of unavailability of the gravity reactor cooling system (GDCS) of the ESBWR power plant designed by GE Hitachi was determined. This work includes creatiion process of a damage tree and performing a quantitative analysis in SAPHIRE tool and estimating uncertainty using the Monte Carlo method. As a part of the work, it was shown that in the probability of failure of a single GDCS P LINE-A line, the most important element are the basic events related in particular to the operation of service valves.