Concept

Nuclear reactor safety system

Publications associées (50)

Laplacian sheep: a hybrid, stop-go policy for leader-based containment control

Giancarlo Ferrari Trecate, Annalisa Buffa

The problem of driving a collection of mobile robots to a given target location is studied in the context of partial difference equations. In particular, we are interested in achieving this transfer while ensuring that the agents stay in the convex polytop ...

Springer2006

Development of a drift-flux model for heavy liquid metal/gas flow

Rakesh Chawla, Konstantin Mikityuk

The gas lift pump concept based on the bubbling of an inert gas into the primary reactor coolant to enhance natural circulation is currently considered in a number of PbBi-cooled reactor concepts. Thus, the analysis of available void fraction data and the ...

Atomic Energy Society of Japan2005

Neoclassical transport and alpha particle confinement in novel 3-D reactor systems

Laurent Villard, Wilfred Anthony Cooper

Neoclassical transport and a particle confinement are analysed for three 3-D reactor designs-the QAS3, the ST/sphellamak hybrid and the sphellamak-using the VENUS code. It is observed that neither the QAS3 nor the ST/sphellamak is truly aquasi-axisymmetric ...

2002

Application and in-depth assessment of RETRAN-3D for best estimate analysis of nuclear power plant transients

Rakesh Chawla

The code RETRAN-3D has been extensively applied in the project STARS at PSI to perform BE analysis for a range of operational and other (non-LOCA) transients for the Swiss NPPs, which include both PWRs and BWRs. Extensive assessment employing experimental ...

Atomic Energy Society of Japan2002

Synchrotron radiation total reflection X-ray fluorescence and energy dispersive X-ray fluorescence analysis on AP1 (TM) films applied to the analysis of trace elements in metal alloys for the construction of nuclear reactor core components: a comparison

Synchrotron radiation induced total reflection X-ray fluorescence (TXRF) and conventional 45 degrees energy dispersive X-ray fluorescence analysis (EDXRF) using a 150-nm-thick AP1 (TM) film as sample carrier have been exploited for the elemental analysis o ...

2001

Validation of an MCNP4B whole-reactor model for LWR-PROTEUS using ENDF/B-V, ENDF/B-VI, and JEF-2.2 cross-section libraries

Rakesh Chawla, Fabian Jatuff, Michaël Plaschy

A detailed three-dimensional, continuous-energy MCNP4B model of the LWR-PROTEUS critical facility has been developed for the analysis of whole-reactor characteristics using ENDF/B-V, ENDF/B-VI and JEF-2.2 cross-section sets. The model has been applied to t ...

Elsevier2001

Flow Boiling in Horizontal Tubes: A Critical Assessment of Current Methodologies.

John Richard Thome

A critical review of evaporation in plain, horizontal tubes is presented, focusing primarly on flow boiling correlations. Emphasis is placed on analyzing the integrity of currently accepted ideas and methods, identifying the weaknesses in current design me ...

1995

Bubble-free oxygenation by means of hydrophobic porous membranes

Urs von Stockar, Ian William Marison

Bubble-free aeration is applied in animal cell culture processes for oxygenation to avoid shear stress and foaming assocd. with direct sparging into the culture. Oxygen mass transfer across PTFE-membranes was detd. in three different reactor systems that m ...

1995

Transport de particules en milieu stochastique. Application au calcul de réactivité d'un corium

The aim of a particle transport theory in stochastic media is to describe the ensemble-averaged and higher moments of the flux by a relatively small set of deterministic equations. These equations based on the classical transport equations describe the tra ...

EPFL1995

Simulations of Compression and Thermonuclear Burn of an Indirect Drive Reactor-Size Inertial Fusion Target

In this paper we present one-dimensional numerical simulations of compression and burn of a high-gain indirect drive inertial fusion target suitable for use in a reactor system. The target consists of a capsule that contains 4.45 mg of DT fuel and the caps ...

1992

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