COBRA-TF Analysis of the High Flux Reactor Hot Channel for a Postulated Large-Break Loss-of-Coolant Accident

Autor:	Marek Stempniewicz, Lawrence E. Hochreiter, Marcel Slootman, Jason G. Williams, Hergen Wiersema, Sule Ergun
Rok vydání:	2008
Předmět:	Nuclear and High Energy Physics Materials science Critical heat flux Flow (psychology) Mechanics Condensed Matter Physics Power (physics) Nuclear physics Nuclear Energy and Engineering Margin (machine learning) Hfr cell Water cooling Loss-of-coolant accident Nominal power (photovoltaic)
Zdroj:	Nuclear Technology. 163:273-284
ISSN:	1943-7471 0029-5450
DOI:	10.13182/nt08-a3987
Popis:	In this study, calculations were performed to simulate a postulated large-break loss-of-coolant accident for the High Flux Reactor (HFR) cooling system using the COBRA-TF computer code. COBRA- TF has been chosen for this analysis since it has suitable and validated two-phase flow models and critical heat flux (CHF) correlations for channels having small hydraulic diameters. Calculations have been performed to determine the CHF margins for the HFR. Six types of calculations were performed to provide a range of CHF margins. All COBRA-TF calculations indicate that margin does exist to the CHF limit for the small-hydraulic-diameter highest-power HFR channel. The range of margin is 2.1 to 1.3 times the nominal power of the highest power channel, depending on the boundary conditions and CHF correlation used. The range of margin identified in the HFR analysis is consistent with the margin values used in commercial nuclear power plants.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2a73b9e54b165a03b3e508873cc9a00 https://doi.org/10.13182/nt08-a3987 Zobrazit plný text záznamu