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In nuclear industry there are engineering systems with great complexity, composed by multiple subsystems in which each of them can contain physical phenomenologies that require different models for their analysis. In certain occasions only the detail in some components is of interest, needing to model the rest of the system to preserve global dynam...
A three-dimensional (3D) computational fluid dynamics (CFD) model is presented for the Second Shutdown System (SSS) of the experimental nuclear reactor RA-10 under design and construction by the Argentinian National Commission of Atomic Energy (CNEA). The RA-10 SSS consists on the drainage of the reflector tank surrounding the reactor core through...
Resumen. Los análisis de ingeniería actuales exigen estudios en sistemas cada vez más complejos. És-tos, a su vez, involucran subsistemas de características disímiles: principalmente diferentes tamaños y parámetros característicos. Por ejemplo, en los sistemas termohidráulicos es posible identificar distintos regímenes de flujo en tanques o en cañe...
A three-dimensional multiscale numerical model is presented in order to describe the fluid dynamics associated to the Second Shutdown System (SSS) of an experimental nuclear reactor. Detailed computational fluid dynamics simulations were performed in a RA-10 SSS Mockup similar to the RA-10 SSS. The main component of the SSS is the reflector tank wh...
This work discusses various aspects in the conceptual design of a fast reactor. The study is focused on breeder reactors and begins researching different choices. The calculation tool used throughout the work is the line CONDOR-CITVAP which is not validated in fast reactor calculations and for this reason a benchmark is done. The work continues wit...
Analysis of the Second Shutdown System (SSS) of the RA10 experimental nuclear reactor, under design and construction by the Argentinian National Commission of Atomic Energy (CNEA). The RA-10 SSS consists on the drainage of the reflector tank surrounding the reactor core through a system of pipes in a limited amount of time solely by the action of gravity.
Newton is a master code that solves implicit coupling in nonlinear calculations. It was designed with a general purpose. For example, it can be used in multiscale coupled problems, in CFD-temalhydraulic problems, in neutronic-termalhydraulic problems, and others. Newton solves residual coupling equations explicitly or implicitly. It has been demostrated in several works that implicit approaches improve convergence of the iterations.