scholarly journals The heuristically-based generalized perturbation theory

2021 ◽  
Vol 7 ◽  
pp. 7
Author(s):  
Augusto Gandini
Keyword(s):  
Perturbation Theory ◽  
Perturbation Method ◽  
Linear Analysis ◽  
Linear Functionals ◽  
Fast Reactors ◽  
The Real ◽  
Generalized Perturbation Theory ◽  
Sensitivity Studies

The generalized perturbation method is described relevant to ratios of bi-linear functionals of the real and adjoint neutron fluxes of critical multiplying systems. Simple linear analysis for optimization and sensitivity studies are then feasible relative to spectrum and space-dependent quantities, such as Doppler and coolant void reactivity effects in fast reactors.

A generalized perturbation theory program for CANDU core analysis

2001 ◽  
Vol 28 (2) ◽  
pp. 169-189 ◽  
Author(s):  
Do Heon Kim ◽  
Jong Kyung Kim ◽  
Hangbok Choi
Keyword(s):  
Perturbation Theory ◽  
Core Analysis ◽  
Generalized Perturbation Theory

scholarly journals Severe Accidents in Sodium-Cooled Fast Reactors: CFD Sensitivity Studies on the Thermal Ablation of Core-Catcher

2021 ◽  
Author(s):  
Olivier A. Czarny ◽  
Adrien Collin de l'Hortet ◽  
Nicolas Goreaud
Keyword(s):  
Thermal Ablation ◽  
Solid Material ◽  
Ablation Process ◽  
Fast Reactors ◽  
Severe Accidents ◽  
Core Catcher ◽  
Show Evidence ◽  
Internal Core ◽  
Sensitivity Studies

Abstract The present work aims at testing the CFD capabilities to simulate erosion of materials which interact with a corium mass. The main foreseen applications are the design of external/internal core catchers or in-vessel retentions devices used to mitigate severe accidents for Sodium-cooled Fast Reactors (SFR). 2D axisymmetric simulations of a corium jet impinging a sacrificial solid material show evidence of a pool-effect, previously observed in experiments, which contributes to limit the ablation process. Complementary sensitivities assess the influence of jet diameter, temperature and velocity.

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