Concept

Passive nuclear safety

Publications associées (46)

Void reactivity decomposition for the Sodium-cooled Fast Reactor in equilibrium fuel cycle

Rakesh Chawla, Konstantin Mikityuk, Jiri Krepel, Kaichao Sun

The Sodium-cooled Fast Reactor (SFR) is one of the most promising Generation IV systems with many advantages, but has one dominating neutronic drawback - a positive sodium void reactivity. The aim of this study is to develop and apply a methodology, which ...

Elsevier2011

Modélisation de la tribocorrosion d'aciers inoxydables dans l'eau à haute pression et haute température

Jonathan Perret

Several metallic components of pressurized water reactors (PWR) used in nuclear power plants are exposed to the combined degradation by friction and corrosion (tribocorrosion). In PWR, corrosion arises from the water pressurized at 150 bars and maintained ...

EPFL2010

Heavy-gas injection in the Generation IV gas-cooled fast reactor for improved decay heat removal under depressurized conditions

Rakesh Chawla, Konstantin Mikityuk, Aaron Simon Epiney

Decay heat removal is a key safety and design issue for the Generation IV gas (helium)-cooled fast reactor. This paper investigates the natural convection capability of the dedicated DHR loops under depressurized conditions while injecting a heavy gas into ...

Elsevier2010

Automatic Verification of Parametric Specifications with Complex Topologies

Swen Jacobs

The focus of this paper is on reducing the complexity in verification by exploiting modularity at various levels: in specification, in verification, and structurally. For specifications, we use the modular language CSP-OZ-DC, which allows us to decouple ve ...

2010

Void reactivity coefficient benchmark results for a 10x10 BWR assembly in the full 0-100% void fraction range

Rakesh Chawla, Fabian Jatuff, Flavio Dante Giust

A boiling water reactor SVEA-96+ fresh fuel lattice has been used as the basis for a benchmark study of the void reactivity coefficient at assembly level in the full voidage range. Results have been obtained using the deterministic codes CASMO-4, HELIOS, P ...

Elsevier Science Ltd.2009

Design of a monitoring network over France in case of a radiological accidental release

Nikki Vercauteren

The Institute of Radiation Protection and Nuclear Safety (France) is planning the set-up of an automatic nuclear aerosol monitoring network over the French territory. Each of the stations will be able to automatically sample the air aerosol content and pro ...

2008

Effects of void uncertainties on the void reactivity coefficient and pin power distributions for a 1010 BWR assembly

Rakesh Chawla, Fabian Jatuff, Flavio Dante Giust

An important source of uncertainty in boiling water reactor physics is associated with the precise characterisation of the moderation properties of the coolant and by-pass regions, with significant impact on reactor physics parameters such as the lattice n ...

Elsevier2006

On the accuracy of reactor physics calculations for square HPLWR fuel assemblies

Rakesh Chawla, Fabian Jatuff

Although the supercritical-pressure or high-performance light water reactor (HPLWR) concept is largely based on the well-established technological experience available with conventional light water reactors, there is still no consensus on various key desig ...

Elsevier2006

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

Time-integrated monitoring of polycyclic aromatic hydrocarbons (PAHs) in groundwater using the Ceramic Dosimeter passive sampling device

Kristin Schirmer

Passive sampling relies on the uptake of contaminants into appropriate sampling devices along a diffusion gradient without using pumps or bailers. Thus, for example, in groundwater sampling, changes to flow due to pumping can be avoided. If the diffusion g ...

Elsevier2005

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