Identification and classification of dynamic event tree scenarios via possibilistic clustering: Application to a steam generator tube rupture event

2009 ◽  
Vol 41 (6) ◽  
pp. 1180-1191 ◽  
Author(s):  
D. Mercurio ◽  
L. Podofillini ◽  
E. Zio ◽  
V.N. Dang
Keyword(s):  
Steam Generator ◽  
Event Tree ◽  
Steam Generator Tube ◽  
Dynamic Event ◽  
Possibilistic Clustering

Damage Domains Calculation Associated With Multiple Damages in a Steam Generator Tube Rupture Dynamic Event Tree

2013 ◽  
Author(s):  
Gonzalo Jimenez ◽  
Cesar Queral ◽  
Maria Jose Rebollo-Mena ◽  
Javier Magan ◽  
Ivan Fernandez ◽  
...  
Keyword(s):  
Steam Generator ◽  
Safety Assessment ◽  
System Response ◽  
Event Tree ◽  
Total Risk ◽  
Simulation Code ◽  
Steam Generator Tube ◽  
Dynamic Event ◽  
Core Damage ◽  
The Impact

The Integrated Safety Assessment (ISA) methodology, developed by the Spanish Nuclear Safety Council (CSN), has been applied to a thermo-hydraulical analysis of a Westinghouse 3-loop PWR plant by means of the dynamic event trees (DET) for Steam Generator Tube Rupture (SGTR) sequences. The ISA methodology allows obtaining the Damage Domains of a SGTR Dynamic Event Tree taking into account the operator actuation times and system response time. The Damage Domains allow to quantify more exactly the risk associated with the sequence even if the contribution to the total risk is due to multiple damages, like dose and core damage in the case of a SGTR. The results shows the impact of the risk associated with the dose as an addition of the risk associated with the core damage. Simulations are performed with SCAIS (Simulation Code system for Integrated Safety Assessment), which includes a dynamic coupling with MAAP thermal hydraulic code.

scholarly journals Analysis of the Accelerator-Driven System Fuel Assembly during the Steam Generator Tube Rupture Accident

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1818
Author(s):  
Di-Si Wang ◽  
Bo Liu ◽  
Sheng Yang ◽  
Bin Xi ◽  
Long Gu ◽  
...  
Keyword(s):  
Fuel Assembly ◽  
Steam Generator ◽  
Metal Flow ◽  
Maximum Temperature ◽  
Steam Generator Tube ◽  
Driven System ◽  
Fuel Assemblies ◽  
Accelerator Driven System ◽  
The Impact ◽  
Steam Bubble

China is developing an ADS (Accelerator-Driven System) research device named the China initiative accelerator-driven system (CiADS). When performing a safety analysis of this new proposed design, the core behavior during the steam generator tube rupture (SGTR) accident has to be investigated. The purpose of our research in this paper is to investigate the impact from different heating conditions and inlet steam contents on steam bubble and coolant temperature distributions in ADS fuel assemblies during a postulated SGTR accident by performing necessary computational fluid dynamics (CFD) simulations. In this research, the open source CFD calculation software OpenFOAM, together with the two-phase VOF (Volume of Fluid) model were used to simulate the steam bubble behavior in heavy liquid metal flow. The model was validated with experimental results published in the open literature. Based on our simulation results, it can be noticed that steam bubbles will accumulate at the periphery region of fuel assemblies, and the maximum temperature in fuel assembly will not overwhelm its working limit during the postulated SGTR accident when the steam content at assembly inlet is less than 15%.

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